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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a number of USB fixes for 5.7-rc6
The "largest" in here is a bunch of raw-gadget fixes and api changes
as the driver just showed up in -rc1 and work has been done to fix up
some uapi issues found with the original submission, before it shows
up in a -final release.
Other than that, a bunch of other small USB gadget fixes, xhci fixes,
some quirks, andother tiny fixes for reported issues.
All of these have been in linux-next with no reported issues"
* tag 'usb-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (26 commits)
USB: gadget: fix illegal array access in binding with UDC
usb: core: hub: limit HUB_QUIRK_DISABLE_AUTOSUSPEND to USB5534B
USB: usbfs: fix mmap dma mismatch
usb: host: xhci-plat: keep runtime active when removing host
usb: xhci: Fix NULL pointer dereference when enqueuing trbs from urb sg list
usb: cdns3: gadget: make a bunch of functions static
usb: mtu3: constify struct debugfs_reg32
usb: gadget: udc: atmel: Make some symbols static
usb: raw-gadget: fix null-ptr-deref when reenabling endpoints
usb: raw-gadget: documentation updates
usb: raw-gadget: support stalling/halting/wedging endpoints
usb: raw-gadget: fix gadget endpoint selection
usb: raw-gadget: improve uapi headers comments
usb: typec: mux: intel: Fix DP_HPD_LVL bit field
usb: raw-gadget: fix return value of ep read ioctls
usb: dwc3: select USB_ROLE_SWITCH
usb: gadget: legacy: fix error return code in gncm_bind()
usb: gadget: legacy: fix error return code in cdc_bind()
usb: gadget: legacy: fix redundant initialization warnings
usb: gadget: tegra-xudc: Fix idle suspend/resume
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Borislav Petkov:
"A single fix for early boot crashes of kernels built with gcc10 and
stack protector enabled"
* tag 'x86_urgent_for_v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Fix early boot crash on gcc-10, third try
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Pull up arch-specific prototype efi_systab_show_arch() in order to
fix a -Wmissing-prototypes warning:
arch/x86/platform/efi/efi.c:957:7: warning: no previous prototype for
‘efi_systab_show_arch’ [-Wmissing-prototypes]
char *efi_systab_show_arch(char *str)
Signed-off-by: Benjamin Thiel <b.thiel@posteo.de>
Link: https://lore.kernel.org/r/20200516132647.14568-1-b.thiel@posteo.de
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
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RFC8684 allows to send 32-bit DATA_ACKs as long as the peer is not
sending 64-bit data-sequence numbers. The 64-bit DSN is only there for
extreme scenarios when a very high throughput subflow is combined with a
long-RTT subflow such that the high-throughput subflow wraps around the
32-bit sequence number space within an RTT of the high-RTT subflow.
It is thus a rare scenario and we should try to use the 32-bit DATA_ACK
instead as long as possible. It allows to reduce the TCP-option overhead
by 4 bytes, thus makes space for an additional SACK-block. It also makes
tcpdumps much easier to read when the DSN and DATA_ACK are both either
32 or 64-bit.
Signed-off-by: Christoph Paasch <cpaasch@apple.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull kvm fixes from Paolo Bonzini:
"A new testcase for guest debugging (gdbstub) that exposed a bunch of
bugs, mostly for AMD processors. And a few other x86 fixes"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: Fix off-by-one error in kvm_vcpu_ioctl_x86_setup_mce
KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c
KVM: SVM: Disable AVIC before setting V_IRQ
KVM: Introduce kvm_make_all_cpus_request_except()
KVM: VMX: pass correct DR6 for GD userspace exit
KVM: x86, SVM: isolate vcpu->arch.dr6 from vmcb->save.dr6
KVM: SVM: keep DR6 synchronized with vcpu->arch.dr6
KVM: nSVM: trap #DB and #BP to userspace if guest debugging is on
KVM: selftests: Add KVM_SET_GUEST_DEBUG test
KVM: X86: Fix single-step with KVM_SET_GUEST_DEBUG
KVM: X86: Set RTM for DB_VECTOR too for KVM_EXIT_DEBUG
KVM: x86: fix DR6 delivery for various cases of #DB injection
KVM: X86: Declare KVM_CAP_SET_GUEST_DEBUG properly
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Move the bpf verifier trace check into the new switch statement in
HEAD.
Resolve the overlapping changes in hinic, where bug fixes overlap
the addition of VF support.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) Fix sk_psock reference count leak on receive, from Xiyu Yang.
2) CONFIG_HNS should be invisible, from Geert Uytterhoeven.
3) Don't allow locking route MTUs in ipv6, RFCs actually forbid this,
from Maciej Żenczykowski.
4) ipv4 route redirect backoff wasn't actually enforced, from Paolo
Abeni.
5) Fix netprio cgroup v2 leak, from Zefan Li.
6) Fix infinite loop on rmmod in conntrack, from Florian Westphal.
7) Fix tcp SO_RCVLOWAT hangs, from Eric Dumazet.
8) Various bpf probe handling fixes, from Daniel Borkmann.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits)
selftests: mptcp: pm: rm the right tmp file
dpaa2-eth: properly handle buffer size restrictions
bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier
bpf: Add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range
bpf: Restrict bpf_probe_read{, str}() only to archs where they work
MAINTAINERS: Mark networking drivers as Maintained.
ipmr: Add lockdep expression to ipmr_for_each_table macro
ipmr: Fix RCU list debugging warning
drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c
net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810
tcp: fix error recovery in tcp_zerocopy_receive()
MAINTAINERS: Add Jakub to networking drivers.
MAINTAINERS: another add of Karsten Graul for S390 networking
drivers: ipa: fix typos for ipa_smp2p structure doc
pppoe: only process PADT targeted at local interfaces
selftests/bpf: Enforce returning 0 for fentry/fexit programs
bpf: Enforce returning 0 for fentry/fexit progs
net: stmmac: fix num_por initialization
security: Fix the default value of secid_to_secctx hook
libbpf: Fix register naming in PT_REGS s390 macros
...
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Move the steps to prepare an inet_connection_sock for
forced disposal inside a separate helper. No functional
changes inteded, this will just simplify the next patch.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Christoph Paasch <cpaasch@apple.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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MP_JOIN subflows must not land into the accept queue.
Currently tcp_check_req() calls an mptcp specific helper
to detect such scenario.
Such helper leverages the subflow context to check for
MP_JOIN subflows. We need to deal also with MP JOIN
failures, even when the subflow context is not available
due allocation failure.
A possible solution would be changing the syn_recv_sock()
signature to allow returning a more descriptive action/
error code and deal with that in tcp_check_req().
Since the above need is MPTCP specific, this patch instead
uses a TCP request socket hole to add a MPTCP specific flag.
Such flag is used by the MPTCP syn_recv_sock() to tell
tcp_check_req() how to deal with the request socket.
This change is a no-op for !MPTCP build, and makes the
MPTCP code simpler. It allows also the next patch to deal
correctly with MP JOIN failure.
v1 -> v2:
- be more conservative on drop_req initialization (Mat)
RFC -> v1:
- move the drop_req bit inside tcp_request_sock (Eric)
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Reviewed-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Alexei Starovoitov says:
====================
pull-request: bpf 2020-05-15
The following pull-request contains BPF updates for your *net* tree.
We've added 9 non-merge commits during the last 2 day(s) which contain
a total of 14 files changed, 137 insertions(+), 43 deletions(-).
The main changes are:
1) Fix secid_to_secctx LSM hook default value, from Anders.
2) Fix bug in mmap of bpf array, from Andrii.
3) Restrict bpf_probe_read to archs where they work, from Daniel.
4) Enforce returning 0 for fentry/fexit progs, from Yonghong.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The BCM54811 PHY shares many similarities with the already supported BCM54810
PHY but additionally requires some semi-unique configuration.
Signed-off-by: Kevin Lo <kevlo@kevlo.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Alexei Starovoitov says:
====================
pull-request: bpf-next 2020-05-15
The following pull-request contains BPF updates for your *net-next* tree.
We've added 37 non-merge commits during the last 1 day(s) which contain
a total of 67 files changed, 741 insertions(+), 252 deletions(-).
The main changes are:
1) bpf_xdp_adjust_tail() now allows to grow the tail as well, from Jesper.
2) bpftool can probe CONFIG_HZ, from Daniel.
3) CAP_BPF is introduced to isolate user processes that use BPF infra and
to secure BPF networking services by dropping CAP_SYS_ADMIN requirement
in certain cases, from Alexei.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Extend tcf_action_dump() with boolean argument 'terse' that is used to
request terse-mode action dump. In terse mode only essential data needed to
identify particular action (action kind, cookie, etc.) and its stats is put
to resulting skb and everything else is omitted. Implement
tcf_exts_terse_dump() helper in cls API that is intended to be used to
request terse dump of all exts (actions) attached to the filter.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add new TCA_DUMP_FLAGS attribute and use it in cls API to request terse
filter output from classifiers with TCA_DUMP_FLAGS_TERSE flag. This option
is intended to be used to improve performance of TC filter dump when
userland only needs to obtain stats and not the whole classifier/action
data. Extend struct tcf_proto_ops with new terse_dump() callback that must
be defined by supporting classifier implementations.
Support of the options in specific classifiers and actions is
implemented in following patches in the series.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Things look good and calming down; the only change to ALSA core is the
fix for racy rawmidi buffer accesses spotted by syzkaller, and the
rest are all small device-specific quirks for HD-audio and USB-audio
devices"
* tag 'sound-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek - Limit int mic boost for Thinkpad T530
ALSA: hda/realtek - Add COEF workaround for ASUS ZenBook UX431DA
ALSA: hda/realtek: Enable headset mic of ASUS UX581LV with ALC295
ALSA: hda/realtek - Enable headset mic of ASUS UX550GE with ALC295
ALSA: hda/realtek - Enable headset mic of ASUS GL503VM with ALC295
ALSA: hda/realtek: Add quirk for Samsung Notebook
ALSA: rawmidi: Fix racy buffer resize under concurrent accesses
ALSA: usb-audio: add mapping for ASRock TRX40 Creator
ALSA: hda/realtek - Fix S3 pop noise on Dell Wyse
Revert "ALSA: hda/realtek: Fix pop noise on ALC225"
ALSA: firewire-lib: fix 'function sizeof not defined' error of tracepoints format
ALSA: usb-audio: Add control message quirk delay for Kingston HyperX headset
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Pull drm fixes from Dave Airlie:
"As mentioned last week an i915 PR came in late, but I left it, so the
i915 bits of this cover 2 weeks, which is why it's likely a bit larger
than usual.
Otherwise it's mostly amdgpu fixes, one tegra fix, one meson fix.
i915:
- Handle idling during i915_gem_evict_something busy loops (Chris)
- Mark current submissions with a weak-dependency (Chris)
- Propagate error from completed fences (Chris)
- Fixes on execlist to avoid GPU hang situation (Chris)
- Fixes couple deadlocks (Chris)
- Timeslice preemption fixes (Chris)
- Fix Display Port interrupt handling on Tiger Lake (Imre)
- Reduce debug noise around Frame Buffer Compression (Peter)
- Fix logic around IPC W/a for Coffee Lake and Kaby Lake (Sultan)
- Avoid dereferencing a dead context (Chris)
tegra:
- tegra120/4 smmu fixes
amdgpu:
- Clockgating fixes
- Fix fbdev with scatter/gather display
- S4 fix for navi
- Soft recovery for gfx10
- Freesync fixes
- Atomic check cursor fix
- Add a gfxoff quirk
- MST fix
amdkfd:
- Fix GEM reference counting
meson:
- error code propogation fix"
* tag 'drm-fixes-2020-05-15' of git://anongit.freedesktop.org/drm/drm: (29 commits)
drm/i915: Handle idling during i915_gem_evict_something busy loops
drm/meson: pm resume add return errno branch
drm/amd/amdgpu: Update update_config() logic
drm/amd/amdgpu: add raven1 part to the gfxoff quirk list
drm/i915: Mark concurrent submissions with a weak-dependency
drm/i915: Propagate error from completed fences
drm/i915/gvt: Fix kernel oops for 3-level ppgtt guest
drm/i915/gvt: Init DPLL/DDI vreg for virtual display instead of inheritance.
drm/amd/display: add basic atomic check for cursor plane
drm/amd/display: Fix vblank and pageflip event handling for FreeSync
drm/amdgpu: implement soft_recovery for gfx10
drm/amdgpu: enable hibernate support on Navi1X
drm/amdgpu: Use GEM obj reference for KFD BOs
drm/amdgpu: force fbdev into vram
drm/amd/powerplay: perform PG ungate prior to CG ungate
drm/amdgpu: drop unnecessary cancel_delayed_work_sync on PG ungate
drm/amdgpu: disable MGCG/MGLS also on gfx CG ungate
drm/i915/execlists: Track inflight CCID
drm/i915/execlists: Avoid reusing the same logical CCID
drm/i915/gem: Remove object_is_locked assertion from unpin_from_display_plane
...
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Implement permissions as stated in uapi/linux/capability.h
In order to do that the verifier allow_ptr_leaks flag is split
into four flags and they are set as:
env->allow_ptr_leaks = bpf_allow_ptr_leaks();
env->bypass_spec_v1 = bpf_bypass_spec_v1();
env->bypass_spec_v4 = bpf_bypass_spec_v4();
env->bpf_capable = bpf_capable();
The first three currently equivalent to perfmon_capable(), since leaking kernel
pointers and reading kernel memory via side channel attacks is roughly
equivalent to reading kernel memory with cap_perfmon.
'bpf_capable' enables bounded loops, precision tracking, bpf to bpf calls and
other verifier features. 'allow_ptr_leaks' enable ptr leaks, ptr conversions,
subtraction of pointers. 'bypass_spec_v1' disables speculative analysis in the
verifier, run time mitigations in bpf array, and enables indirect variable
access in bpf programs. 'bypass_spec_v4' disables emission of sanitation code
by the verifier.
That means that the networking BPF program loaded with CAP_BPF + CAP_NET_ADMIN
will have speculative checks done by the verifier and other spectre mitigation
applied. Such networking BPF program will not be able to leak kernel pointers
and will not be able to access arbitrary kernel memory.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200513230355.7858-3-alexei.starovoitov@gmail.com
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Split BPF operations that are allowed under CAP_SYS_ADMIN into
combination of CAP_BPF, CAP_PERFMON, CAP_NET_ADMIN.
For backward compatibility include them in CAP_SYS_ADMIN as well.
The end result provides simple safety model for applications that use BPF:
- to load tracing program types
BPF_PROG_TYPE_{KPROBE, TRACEPOINT, PERF_EVENT, RAW_TRACEPOINT, etc}
use CAP_BPF and CAP_PERFMON
- to load networking program types
BPF_PROG_TYPE_{SCHED_CLS, XDP, SK_SKB, etc}
use CAP_BPF and CAP_NET_ADMIN
There are few exceptions from this rule:
- bpf_trace_printk() is allowed in networking programs, but it's using
tracing mechanism, hence this helper needs additional CAP_PERFMON
if networking program is using this helper.
- BPF_F_ZERO_SEED flag for hash/lru map is allowed under CAP_SYS_ADMIN only
to discourage production use.
- BPF HW offload is allowed under CAP_SYS_ADMIN.
- bpf_probe_write_user() is allowed under CAP_SYS_ADMIN only.
CAPs are not checked at attach/detach time with two exceptions:
- loading BPF_PROG_TYPE_CGROUP_SKB is allowed for unprivileged users,
hence CAP_NET_ADMIN is required at attach time.
- flow_dissector detach doesn't check prog FD at detach,
hence CAP_NET_ADMIN is required at detach time.
CAP_SYS_ADMIN is required to iterate BPF objects (progs, maps, links) via get_next_id
command and convert them to file descriptor via GET_FD_BY_ID command.
This restriction guarantees that mutliple tasks with CAP_BPF are not able to
affect each other. That leads to clean isolation of tasks. For example:
task A with CAP_BPF and CAP_NET_ADMIN loads and attaches a firewall via bpf_link.
task B with the same capabilities cannot detach that firewall unless
task A explicitly passed link FD to task B via scm_rights or bpffs.
CAP_SYS_ADMIN can still detach/unload everything.
Two networking user apps with CAP_SYS_ADMIN and CAP_NET_ADMIN can
accidentely mess with each other programs and maps.
Two networking user apps with CAP_NET_ADMIN and CAP_BPF cannot affect each other.
CAP_NET_ADMIN + CAP_BPF allows networking programs access only packet data.
Such networking progs cannot access arbitrary kernel memory or leak pointers.
bpftool, bpftrace, bcc tools binaries should NOT be installed with
CAP_BPF and CAP_PERFMON, since unpriv users will be able to read kernel secrets.
But users with these two permissions will be able to use these tracing tools.
CAP_PERFMON is least secure, since it allows kprobes and kernel memory access.
CAP_NET_ADMIN can stop network traffic via iproute2.
CAP_BPF is the safest from security point of view and harmless on its own.
Having CAP_BPF and/or CAP_NET_ADMIN is not enough to write into arbitrary map
and if that map is used by firewall-like bpf prog.
CAP_BPF allows many bpf prog_load commands in parallel. The verifier
may consume large amount of memory and significantly slow down the system.
Existing unprivileged BPF operations are not affected.
In particular unprivileged users are allowed to load socket_filter and cg_skb
program types and to create array, hash, prog_array, map-in-map map types.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200513230355.7858-2-alexei.starovoitov@gmail.com
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... or the odyssey of trying to disable the stack protector for the
function which generates the stack canary value.
The whole story started with Sergei reporting a boot crash with a kernel
built with gcc-10:
Kernel panic — not syncing: stack-protector: Kernel stack is corrupted in: start_secondary
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc5—00235—gfffb08b37df9 #139
Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./H77M—D3H, BIOS F12 11/14/2013
Call Trace:
dump_stack
panic
? start_secondary
__stack_chk_fail
start_secondary
secondary_startup_64
-—-[ end Kernel panic — not syncing: stack—protector: Kernel stack is corrupted in: start_secondary
This happens because gcc-10 tail-call optimizes the last function call
in start_secondary() - cpu_startup_entry() - and thus emits a stack
canary check which fails because the canary value changes after the
boot_init_stack_canary() call.
To fix that, the initial attempt was to mark the one function which
generates the stack canary with:
__attribute__((optimize("-fno-stack-protector"))) ... start_secondary(void *unused)
however, using the optimize attribute doesn't work cumulatively
as the attribute does not add to but rather replaces previously
supplied optimization options - roughly all -fxxx options.
The key one among them being -fno-omit-frame-pointer and thus leading to
not present frame pointer - frame pointer which the kernel needs.
The next attempt to prevent compilers from tail-call optimizing
the last function call cpu_startup_entry(), shy of carving out
start_secondary() into a separate compilation unit and building it with
-fno-stack-protector, was to add an empty asm("").
This current solution was short and sweet, and reportedly, is supported
by both compilers but we didn't get very far this time: future (LTO?)
optimization passes could potentially eliminate this, which leads us
to the third attempt: having an actual memory barrier there which the
compiler cannot ignore or move around etc.
That should hold for a long time, but hey we said that about the other
two solutions too so...
Reported-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Kalle Valo <kvalo@codeaurora.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200314164451.346497-1-slyfox@gentoo.org
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The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
sizeof(flexible-array-member) triggers a warning because flexible array
members have incomplete type[1]. There are some instances of code in
which the sizeof operator is being incorrectly/erroneously applied to
zero-length arrays and the result is zero. Such instances may be hiding
some bugs. So, this work (flexible-array member conversions) will also
help to get completely rid of those sorts of issues.
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
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Finally, after all drivers have a frame size, allow BPF-helper
bpf_xdp_adjust_tail() to grow or extend packet size at frame tail.
Remember that helper/macro xdp_data_hard_end have reserved some
tailroom. Thus, this helper makes sure that the BPF-prog don't have
access to this tailroom area.
V2: Remove one chicken check and use WARN_ONCE for other
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/158945348530.97035.12577148209134239291.stgit@firesoul
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Intel drivers implement native AF_XDP zerocopy in separate C-files,
that have its own invocation of bpf_prog_run_xdp(). The setup of
xdp_buff is also handled in separately from normal code path.
This patch update XDP frame_sz for AF_XDP zerocopy drivers i40e, ice
and ixgbe, as the code changes needed are very similar. Introduce a
helper function xsk_umem_xdp_frame_sz() for calculating frame size.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Cc: intel-wired-lan@lists.osuosl.org
Cc: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/158945347511.97035.8536753731329475655.stgit@firesoul
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Use hole in struct xdp_frame, when adding member frame_sz, which keeps
same sizeof struct (32 bytes)
Drivers ixgbe and sfc had bug cases where the necessary/expected
tailroom was not reserved. This can lead to some hard to catch memory
corruption issues. Having the drivers frame_sz this can be detected when
packet length/end via xdp->data_end exceed the xdp_data_hard_end
pointer, which accounts for the reserved the tailroom.
When detecting this driver issue, simply fail the conversion with NULL,
which results in feedback to driver (failing xdp_do_redirect()) causing
driver to drop packet. Given the lack of consistent XDP stats, this can
be hard to troubleshoot. And given this is a driver bug, we want to
generate some more noise in form of a WARN stack dump (to ID the driver
code that inlined convert_to_xdp_frame).
Inlining the WARN macro is problematic, because it adds an asm
instruction (on Intel CPUs ud2) what influence instruction cache
prefetching. Thus, introduce xdp_warn and macro XDP_WARN, to avoid this
and at the same time make identifying the function and line of this
inlined function easier.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/158945337313.97035.10015729316710496600.stgit@firesoul
|
|
XDP have evolved to support several frame sizes, but xdp_buff was not
updated with this information. The frame size (frame_sz) member of
xdp_buff is introduced to know the real size of the memory the frame is
delivered in.
When introducing this also make it clear that some tailroom is
reserved/required when creating SKBs using build_skb().
It would also have been an option to introduce a pointer to
data_hard_end (with reserved offset). The advantage with frame_sz is
that (like rxq) drivers only need to setup/assign this value once per
NAPI cycle. Due to XDP-generic (and some drivers) it's not possible to
store frame_sz inside xdp_rxq_info, because it's varies per packet as it
can be based/depend on packet length.
V2: nitpick: deduct -> deduce
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/158945334261.97035.555255657490688547.stgit@firesoul
|
|
Alexei Starovoitov says:
====================
pull-request: bpf-next 2020-05-14
The following pull-request contains BPF updates for your *net-next* tree.
The main changes are:
1) Merged tag 'perf-for-bpf-2020-05-06' from tip tree that includes CAP_PERFMON.
2) support for narrow loads in bpf_sock_addr progs and additional
helpers in cg-skb progs, from Andrey.
3) bpf benchmark runner, from Andrii.
4) arm and riscv JIT optimizations, from Luke.
5) bpf iterator infrastructure, from Yonghong.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
With having ability to lookup sockets in cgroup skb programs it becomes
useful to access cgroup id of retrieved sockets so that policies can be
implemented based on origin cgroup of such socket.
For example, a container running in a cgroup can have cgroup skb ingress
program that can lookup peer socket that is sending packets to a process
inside the container and decide whether those packets should be allowed
or denied based on cgroup id of the peer.
More specifically such ingress program can implement intra-host policy
"allow incoming packets only from this same container and not from any
other container on same host" w/o relying on source IP addresses since
quite often it can be the case that containers share same IP address on
the host.
Introduce two new helpers for this use-case: bpf_sk_cgroup_id() and
bpf_sk_ancestor_cgroup_id().
These helpers are similar to existing bpf_skb_{,ancestor_}cgroup_id
helpers with the only difference that sk is used to get cgroup id
instead of skb, and share code with them.
See documentation in UAPI for more details.
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/f5884981249ce911f63e9b57ecd5d7d19154ff39.1589486450.git.rdna@fb.com
|
|
bpf_sock_addr.user_port supports only 4-byte load and it leads to ugly
code in BPF programs, like:
volatile __u32 user_port = ctx->user_port;
__u16 port = bpf_ntohs(user_port);
Since otherwise clang may optimize the load to be 2-byte and it's
rejected by verifier.
Add support for 1- and 2-byte loads same way as it's supported for other
fields in bpf_sock_addr like user_ip4, msg_src_ip4, etc.
Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/c1e983f4c17573032601d0b2b1f9d1274f24bc16.1589420814.git.rdna@fb.com
|
|
Set the correct bit when checking for PHY_BRCM_DIS_TXCRXC_NOENRGY on the
BCM54810 PHY.
Fixes: 0ececcfc9267 ("net: phy: broadcom: Allow BCM54810 to use bcm54xx_adjust_rxrefclk()")
Signed-off-by: Kevin Lo <kevlo@kevlo.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
On some adjacent code, fix bad code formatting
Signed-off-by: Ariel Elior <ariel.elior@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
On different hardware events we have to respond differently,
on some of hardware indications hw attention (error condition)
should be cleared by the driver to continue normal functioning.
Here we introduce attention clear flags, and put them on some
important events (in aeu_descs).
Signed-off-by: Ariel Elior <ariel.elior@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Here we introduce qed device error tracking flags and error types.
qed_hw_err_notify is an entrace point to report errors.
It'll notify higher level drivers (qede/qedr/etc) to handle and recover
the error.
List of posible errors comes from hardware interfaces, but could be
extended in future.
Signed-off-by: Ariel Elior <ariel.elior@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for net:
1) Fix gcc-10 compilation warning in nf_conntrack, from Arnd Bergmann.
2) Add NF_FLOW_HW_PENDING to avoid races between stats and deletion
commands, from Paul Blakey.
3) Remove WQ_MEM_RECLAIM from the offload workqueue, from Roi Dayan.
4) Infinite loop when removing nf_conntrack module, from Florian Westphal.
5) Set NF_FLOW_TEARDOWN bit on expiration to avoid races when refreshing
the timeout from the software path.
6) Missing nft_set_elem_expired() check in the rbtree, from Phil Sutter.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
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security_secid_to_secctx is called by the bpf_lsm hook and a successful
return value (i.e 0) implies that the parameter will be consumed by the
LSM framework. The current behaviour return success when the pointer
isn't initialized when CONFIG_BPF_LSM is enabled, with the default
return from kernel/bpf/bpf_lsm.c.
This is the internal error:
[ 1229.341488][ T2659] usercopy: Kernel memory exposure attempt detected from null address (offset 0, size 280)!
[ 1229.374977][ T2659] ------------[ cut here ]------------
[ 1229.376813][ T2659] kernel BUG at mm/usercopy.c:99!
[ 1229.378398][ T2659] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[ 1229.380348][ T2659] Modules linked in:
[ 1229.381654][ T2659] CPU: 0 PID: 2659 Comm: systemd-journal Tainted: G B W 5.7.0-rc5-next-20200511-00019-g864e0c6319b8-dirty #13
[ 1229.385429][ T2659] Hardware name: linux,dummy-virt (DT)
[ 1229.387143][ T2659] pstate: 80400005 (Nzcv daif +PAN -UAO BTYPE=--)
[ 1229.389165][ T2659] pc : usercopy_abort+0xc8/0xcc
[ 1229.390705][ T2659] lr : usercopy_abort+0xc8/0xcc
[ 1229.392225][ T2659] sp : ffff000064247450
[ 1229.393533][ T2659] x29: ffff000064247460 x28: 0000000000000000
[ 1229.395449][ T2659] x27: 0000000000000118 x26: 0000000000000000
[ 1229.397384][ T2659] x25: ffffa000127049e0 x24: ffffa000127049e0
[ 1229.399306][ T2659] x23: ffffa000127048e0 x22: ffffa000127048a0
[ 1229.401241][ T2659] x21: ffffa00012704b80 x20: ffffa000127049e0
[ 1229.403163][ T2659] x19: ffffa00012704820 x18: 0000000000000000
[ 1229.405094][ T2659] x17: 0000000000000000 x16: 0000000000000000
[ 1229.407008][ T2659] x15: 0000000000000000 x14: 003d090000000000
[ 1229.408942][ T2659] x13: ffff80000d5b25b2 x12: 1fffe0000d5b25b1
[ 1229.410859][ T2659] x11: 1fffe0000d5b25b1 x10: ffff80000d5b25b1
[ 1229.412791][ T2659] x9 : ffffa0001034bee0 x8 : ffff00006ad92d8f
[ 1229.414707][ T2659] x7 : 0000000000000000 x6 : ffffa00015eacb20
[ 1229.416642][ T2659] x5 : ffff0000693c8040 x4 : 0000000000000000
[ 1229.418558][ T2659] x3 : ffffa0001034befc x2 : d57a7483a01c6300
[ 1229.420610][ T2659] x1 : 0000000000000000 x0 : 0000000000000059
[ 1229.422526][ T2659] Call trace:
[ 1229.423631][ T2659] usercopy_abort+0xc8/0xcc
[ 1229.425091][ T2659] __check_object_size+0xdc/0x7d4
[ 1229.426729][ T2659] put_cmsg+0xa30/0xa90
[ 1229.428132][ T2659] unix_dgram_recvmsg+0x80c/0x930
[ 1229.429731][ T2659] sock_recvmsg+0x9c/0xc0
[ 1229.431123][ T2659] ____sys_recvmsg+0x1cc/0x5f8
[ 1229.432663][ T2659] ___sys_recvmsg+0x100/0x160
[ 1229.434151][ T2659] __sys_recvmsg+0x110/0x1a8
[ 1229.435623][ T2659] __arm64_sys_recvmsg+0x58/0x70
[ 1229.437218][ T2659] el0_svc_common.constprop.1+0x29c/0x340
[ 1229.438994][ T2659] do_el0_svc+0xe8/0x108
[ 1229.440587][ T2659] el0_svc+0x74/0x88
[ 1229.441917][ T2659] el0_sync_handler+0xe4/0x8b4
[ 1229.443464][ T2659] el0_sync+0x17c/0x180
[ 1229.444920][ T2659] Code: aa1703e2 aa1603e1 910a8260 97ecc860 (d4210000)
[ 1229.447070][ T2659] ---[ end trace 400497d91baeaf51 ]---
[ 1229.448791][ T2659] Kernel panic - not syncing: Fatal exception
[ 1229.450692][ T2659] Kernel Offset: disabled
[ 1229.452061][ T2659] CPU features: 0x240002,20002004
[ 1229.453647][ T2659] Memory Limit: none
[ 1229.455015][ T2659] ---[ end Kernel panic - not syncing: Fatal exception ]---
Rework the so the default return value is -EOPNOTSUPP.
There are likely other callbacks such as security_inode_getsecctx() that
may have the same problem, and that someone that understand the code
better needs to audit them.
Thank you Arnd for helping me figure out what went wrong.
Fixes: 98e828a0650f ("security: Refactor declaration of LSM hooks")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: James Morris <jamorris@linux.microsoft.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/bpf/20200512174607.9630-1-anders.roxell@linaro.org
|
|
Merge misc fixes from Andrew Morton:
"7 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
kasan: add missing functions declarations to kasan.h
kasan: consistently disable debugging features
ipc/util.c: sysvipc_find_ipc() incorrectly updates position index
userfaultfd: fix remap event with MREMAP_DONTUNMAP
mm/gup: fix fixup_user_fault() on multiple retries
epoll: call final ep_events_available() check under the lock
mm, memcg: fix inconsistent oom event behavior
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull more tracing fixes from Steven Rostedt:
"Various tracing fixes:
- Fix a crash when having function tracing and function stack tracing
on the command line.
The ftrace trampolines are created as executable and read only. But
the stack tracer tries to modify them with text_poke() which
expects all kernel text to still be writable at boot. Keep the
trampolines writable at boot, and convert them to read-only with
the rest of the kernel.
- A selftest was triggering in the ring buffer iterator code, that is
no longer valid with the update of keeping the ring buffer writable
while a iterator is reading.
Just bail after three failed attempts to get an event and remove
the warning and disabling of the ring buffer.
- While modifying the ring buffer code, decided to remove all the
unnecessary BUG() calls"
* tag 'trace-v5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ring-buffer: Remove all BUG() calls
ring-buffer: Don't deactivate the ring buffer on failed iterator reads
x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up
|
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A recent commit 9852ae3fe529 ("mm, memcg: consider subtrees in
memory.events") changed the behavior of memcg events, which will now
consider subtrees in memory.events.
But oom_kill event is a special one as it is used in both cgroup1 and
cgroup2. In cgroup1, it is displayed in memory.oom_control. The file
memory.oom_control is in both root memcg and non root memcg, that is
different with memory.event as it only in non-root memcg. That commit
is okay for cgroup2, but it is not okay for cgroup1 as it will cause
inconsistent behavior between root memcg and non-root memcg.
Here's an example on why this behavior is inconsistent in cgroup1.
root memcg
/
memcg foo
/
memcg bar
Suppose there's an oom_kill in memcg bar, then the oon_kill will be
root memcg : memory.oom_control(oom_kill) 0
/
memcg foo : memory.oom_control(oom_kill) 1
/
memcg bar : memory.oom_control(oom_kill) 1
For the non-root memcg, its memory.oom_control(oom_kill) includes its
descendants' oom_kill, but for root memcg, it doesn't include its
descendants' oom_kill. That means, memory.oom_control(oom_kill) has
different meanings in different memcgs. That is inconsistent. Then the
user has to know whether the memcg is root or not.
If we can't fully support it in cgroup1, for example by adding
memory.events.local into cgroup1 as well, then let's don't touch its
original behavior.
Fixes: 9852ae3fe529 ("mm, memcg: consider subtrees in memory.events")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Chris Down <chris@chrisdown.name>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200502141055.7378-1-laoar.shao@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Raw Gadget is currently unable to stall/halt/wedge gadget endpoints,
which is required for proper emulation of certain USB classes.
This patch adds a few more ioctls:
- USB_RAW_IOCTL_EP0_STALL allows to stall control endpoint #0 when
there's a pending setup request for it.
- USB_RAW_IOCTL_SET/CLEAR_HALT/WEDGE allow to set/clear halt/wedge status
on non-control non-isochronous endpoints.
Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
|
|
Currently automatic gadget endpoint selection based on required features
doesn't work. Raw Gadget tries iterating over the list of available
endpoints and finding one that has the right direction and transfer type.
Unfortunately selecting arbitrary gadget endpoints (even if they satisfy
feature requirements) doesn't work, as (depending on the UDC driver) they
might have fixed addresses, and one also needs to provide matching
endpoint addresses in the descriptors sent to the host.
The composite framework deals with this by assigning endpoint addresses
in usb_ep_autoconfig() before enumeration starts. This approach won't work
with Raw Gadget as the endpoints are supposed to be enabled after a
set_configuration/set_interface request from the host, so it's too late to
patch the endpoint descriptors that had already been sent to the host.
For Raw Gadget we take another approach. Similarly to GadgetFS, we allow
the user to make the decision as to which gadget endpoints to use.
This patch adds another Raw Gadget ioctl USB_RAW_IOCTL_EPS_INFO that
exposes information about all non-control endpoints that a currently
connected UDC has. This information includes endpoints addresses, as well
as their capabilities and limits to allow the user to choose the most
fitting gadget endpoint.
The USB_RAW_IOCTL_EP_ENABLE ioctl is updated to use the proper endpoint
validation routine usb_gadget_ep_match_desc().
These changes affect the portability of the gadgets that use Raw Gadget
when running on different UDCs. Nevertheless, as long as the user relies
on the information provided by USB_RAW_IOCTL_EPS_INFO to dynamically
choose endpoint addresses, UDC-agnostic gadgets can still be written with
Raw Gadget.
Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
|
|
Fix typo "trasferred" => "transferred".
Don't call USB requests URBs.
Fix comment style.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
|
|
While debugging a boot failure, the following unknown error record was
seen in the boot logs.
<...>
BERT: Error records from previous boot:
[Hardware Error]: event severity: fatal
[Hardware Error]: Error 0, type: fatal
[Hardware Error]: section type: unknown, 81212a96-09ed-4996-9471-8d729c8e69ed
[Hardware Error]: section length: 0x290
[Hardware Error]: 00000000: 00000001 00000000 00000000 00020002 ................
[Hardware Error]: 00000010: 00020002 0000001f 00000320 00000000 ........ .......
[Hardware Error]: 00000020: 00000000 00000000 00000000 00000000 ................
[Hardware Error]: 00000030: 00000000 00000000 00000000 00000000 ................
<...>
On further investigation, it was found that the error record with
UUID (81212a96-09ed-4996-9471-8d729c8e69ed) has been defined in the
UEFI Specification at least since v2.4 and has recently had additional
fields defined in v2.7 Section N.2.10 Firmware Error Record Reference.
Add support for parsing and printing the defined fields to give users
a chance to figure out what went wrong.
Signed-off-by: Punit Agrawal <punit1.agrawal@toshiba.co.jp>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: James Morse <james.morse@arm.com>
Cc: linux-acpi@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Link: https://lore.kernel.org/r/20200512045502.3810339-1-punit1.agrawal@toshiba.co.jp
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
|
|
git://anongit.freedesktop.org/tegra/linux into drm-fixes
drm/tegra: Fixes for v5.7
This contains a pair of patches which fix SMMU support on Tegra124 and
Tegra210 for host1x and the Tegra DRM driver.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thierry Reding <thierry.reding@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200508101355.3031268-1-thierry.reding@gmail.com
|
|
Most modern broadcom PHYs support ECD (enhanced cable diagnostics). Add
support for it in the bcm-phy-lib so they can easily be used in the PHY
driver.
There are two access methods for ECD: legacy by expansion registers and
via the new RDB registers which are exclusive. Provide functions in two
variants where the PHY driver can choose from. To keep things simple for
now, we just switch the register access to expansion registers in the
RDB variant for now. On the flipside, we have to keep a bus lock to
prevent any other non-legacy access on the PHY.
The results of the intra-pair tests are inconclusive (at least for the
BCM54140). Most of the times half the length is reported but sometimes
the length is correct.
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Commit b121b341e598 ("bpf: Add PTR_TO_BTF_ID_OR_NULL
support") adds a field btf_id_or_null_non0_off to
bpf_prog->aux structure to indicate that the
first ctx argument is PTR_TO_BTF_ID reg_type and
all others are PTR_TO_BTF_ID_OR_NULL.
This approach does not really scale if we have
other different reg types in the future, e.g.,
a pointer to a buffer.
This patch enables bpf_iter targets registering ctx argument
reg types which may be different from the default one.
For example, for pointers to structures, the default reg_type
is PTR_TO_BTF_ID for tracing program. The target can register
a particular pointer type as PTR_TO_BTF_ID_OR_NULL which can
be used by the verifier to enforce accesses.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200513180221.2949882-1-yhs@fb.com
|
|
Change func bpf_iter_unreg_target() parameter from target
name to target reg_info, similar to bpf_iter_reg_target().
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200513180220.2949737-1-yhs@fb.com
|
|
Currently bpf_iter_reg_target takes parameters from target
and allocates memory to save them. This is really not
necessary, esp. in the future we may grow information
passed from targets to bpf_iter manager.
The patch refactors the code so target reg_info
becomes static and bpf_iter manager can just take
a reference to it.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200513180219.2949605-1-yhs@fb.com
|
|
This is to be consistent with tracing and lsm programs
which have prefix "bpf_trace_" and "bpf_lsm_" respectively.
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200513180216.2949387-1-yhs@fb.com
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Johan Hedberg says:
====================
pull request: bluetooth-next 2020-05-13
Here's a second attempt at a bluetooth-next pull request which
supercedes the one dated 2020-05-09. This should have the issues
discovered by Jakub fixed.
- Add support for Intel Typhoon Peak device (8087:0032)
- Add device tree bindings for Realtek RTL8723BS device
- Add device tree bindings for Qualcomm QCA9377 device
- Add support for experimental features configuration through mgmt
- Add driver hook to prevent wake from suspend
- Add support for waiting for L2CAP disconnection response
- Multiple fixes & cleanups to the btbcm driver
- Add support for LE scatternet topology for selected devices
- A few other smaller fixes & cleanups
Please let me know if there are any issues pulling. Thanks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Let drivers have a hook to disable configuring scanning during suspend.
Drivers should use the device_may_wakeup function call to determine
whether hci should be configured for wakeup.
For example, an implementation for btusb may look like the following:
bool btusb_prevent_wake(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);
return !device_may_wakeup(&data->udev->dev);
}
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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Renamed BT_SUSPEND_COMPLETE to BT_SUSPEND_CONFIGURE_WAKE since it sets
up the event filter and whitelist for wake-up.
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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Booting one of my machines, it triggered the following crash:
Kernel/User page tables isolation: enabled
ftrace: allocating 36577 entries in 143 pages
Starting tracer 'function'
BUG: unable to handle page fault for address: ffffffffa000005c
#PF: supervisor write access in kernel mode
#PF: error_code(0x0003) - permissions violation
PGD 2014067 P4D 2014067 PUD 2015063 PMD 7b253067 PTE 7b252061
Oops: 0003 [#1] PREEMPT SMP PTI
CPU: 0 PID: 0 Comm: swapper Not tainted 5.4.0-test+ #24
Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./To be filled by O.E.M., BIOS SDBLI944.86P 05/08/2007
RIP: 0010:text_poke_early+0x4a/0x58
Code: 34 24 48 89 54 24 08 e8 bf 72 0b 00 48 8b 34 24 48 8b 4c 24 08 84 c0 74 0b 48 89 df f3 a4 48 83 c4 10 5b c3 9c 58 fa 48 89 df <f3> a4 50 9d 48 83 c4 10 5b e9 d6 f9 ff ff
0 41 57 49
RSP: 0000:ffffffff82003d38 EFLAGS: 00010046
RAX: 0000000000000046 RBX: ffffffffa000005c RCX: 0000000000000005
RDX: 0000000000000005 RSI: ffffffff825b9a90 RDI: ffffffffa000005c
RBP: ffffffffa000005c R08: 0000000000000000 R09: ffffffff8206e6e0
R10: ffff88807b01f4c0 R11: ffffffff8176c106 R12: ffffffff8206e6e0
R13: ffffffff824f2440 R14: 0000000000000000 R15: ffffffff8206eac0
FS: 0000000000000000(0000) GS:ffff88807d400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffa000005c CR3: 0000000002012000 CR4: 00000000000006b0
Call Trace:
text_poke_bp+0x27/0x64
? mutex_lock+0x36/0x5d
arch_ftrace_update_trampoline+0x287/0x2d5
? ftrace_replace_code+0x14b/0x160
? ftrace_update_ftrace_func+0x65/0x6c
__register_ftrace_function+0x6d/0x81
ftrace_startup+0x23/0xc1
register_ftrace_function+0x20/0x37
func_set_flag+0x59/0x77
__set_tracer_option.isra.19+0x20/0x3e
trace_set_options+0xd6/0x13e
apply_trace_boot_options+0x44/0x6d
register_tracer+0x19e/0x1ac
early_trace_init+0x21b/0x2c9
start_kernel+0x241/0x518
? load_ucode_intel_bsp+0x21/0x52
secondary_startup_64+0xa4/0xb0
I was able to trigger it on other machines, when I added to the kernel
command line of both "ftrace=function" and "trace_options=func_stack_trace".
The cause is the "ftrace=function" would register the function tracer
and create a trampoline, and it will set it as executable and
read-only. Then the "trace_options=func_stack_trace" would then update
the same trampoline to include the stack tracer version of the function
tracer. But since the trampoline already exists, it updates it with
text_poke_bp(). The problem is that text_poke_bp() called while
system_state == SYSTEM_BOOTING, it will simply do a memcpy() and not
the page mapping, as it would think that the text is still read-write.
But in this case it is not, and we take a fault and crash.
Instead, lets keep the ftrace trampolines read-write during boot up,
and then when the kernel executable text is set to read-only, the
ftrace trampolines get set to read-only as well.
Link: https://lkml.kernel.org/r/20200430202147.4dc6e2de@oasis.local.home
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: stable@vger.kernel.org
Fixes: 768ae4406a5c ("x86/ftrace: Use text_poke()")
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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