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2018-02-23net: fib_rules: Add new attribute to set protocolDonald Sharp
For ages iproute2 has used `struct rtmsg` as the ancillary header for FIB rules and in the process set the protocol value to RTPROT_BOOT. Until ca56209a66 ("net: Allow a rule to track originating protocol") the kernel rules code ignored the protocol value sent from userspace and always returned 0 in notifications. To avoid incompatibility with existing iproute2, send the protocol as a new attribute. Fixes: cac56209a66 ("net: Allow a rule to track originating protocol") Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-23rds: rds_msg_zcopy should return error of null rm->data.op_mmp_znotifierSowmini Varadhan
if either or both of MSG_ZEROCOPY and SOCK_ZEROCOPY have not been specified, the rm->data.op_mmp_znotifier allocation will be skipped. In this case, it is invalid ot pass down a cmsghdr with RDS_CMSG_ZCOPY_COOKIE, so return EINVAL from rds_msg_zcopy for this case. Reported-by: syzbot+f893ae7bb2f6456dfbc3@syzkaller.appspotmail.com Fixes: 0cebaccef3ac ("rds: zerocopy Tx support.") Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Willem de Bruijn <willemb@google.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-22Merge tag 'mac80211-next-for-davem-2018-02-22' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Johannes Berg says: ==================== Various updates across wireless. One thing to note: I've included a new ethertype that wireless uses (ETH_P_PREAUTH) in if_ether.h. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-22mac80211: Call mgd_prep_tx before transmitting deauthenticationIlan Peer
In multi channel scenarios, when disassociating from the AP before a beacon was heard from the AP, it is not guaranteed that the virtual interface is granted air time for the transmission of the deauthentication frame. This in turn can lead to various issues as the AP might never get the deauthentication frame. To mitigate such possible issues, add a HW flag indicating that the driver requires mac80211 to call the mgd_prep_tx() driver callback to make sure that the virtual interface is granted immediate airtime to be able to transmit the frame, in case that no beacon was heard from the AP. Signed-off-by: Ilan Peer <ilan.peer@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-22mac80211: add get TID helperSara Sharon
Extracting the TID from the QOS header is common enough to justify helper. Signed-off-by: Sara Sharon <sara.sharon@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-22mac80211: support reporting A-MPDU EOF bit value/knownJohannes Berg
Support getting the EOF bit value reported from hardware and writing it out to radiotap. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-21net: Allow a rule to track originating protocolDonald Sharp
Allow a rule that is being added/deleted/modified or dumped to contain the originating protocol's id. The protocol is handled just like a routes originating protocol is. This is especially useful because there is starting to be a plethora of different user space programs adding rules. Allow the vrf device to specify that the kernel is the originator of the rule created for this device. Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21tcp: remove dead code after CHECKSUM_PARTIAL adoptionEric Dumazet
Since all skbs in write/rtx queues have CHECKSUM_PARTIAL, we can remove dead code. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21tcp: remove dead code from tcp_set_skb_tso_segs()Eric Dumazet
We no longer have skbs with skb->ip_summed == CHECKSUM_NONE in TCP write queues. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21tcp: tcp_sendmsg() only deals with CHECKSUM_PARTIALEric Dumazet
We no longer have skbs with skb->ip_summed == CHECKSUM_NONE in TCP write queues. We can remove dead code in tcp_sendmsg(). Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21tcp: remove sk_check_csum_caps()Eric Dumazet
Since TCP relies on GSO, we do not need this helper anymore. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21tcp: remove sk_can_gso() useEric Dumazet
After previous commit, sk_can_gso() is always true. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21tcp: switch to GSO being always onEric Dumazet
Oleksandr Natalenko reported performance issues with BBR without FQ packet scheduler that were root caused to lack of SG and GSO/TSO on his configuration. In this mode, TCP internal pacing has to setup a high resolution timer for each MSS sent. We could implement in TCP a strategy similar to the one adopted in commit fefa569a9d4b ("net_sched: sch_fq: account for schedule/timers drifts") or decide to finally switch TCP stack to a GSO only mode. This has many benefits : 1) Most TCP developments are done with TSO in mind. 2) Less high-resolution timers needs to be armed for TCP-pacing 3) GSO can benefit of xmit_more hint 4) Receiver GRO is more effective (as if TSO was used for real on sender) -> Lower ACK traffic 5) Write queues have less overhead (one skb holds about 64KB of payload) 6) SACK coalescing just works. 7) rtx rb-tree contains less packets, SACK is cheaper. This patch implements the minimum patch, but we can remove some legacy code as follow ups. Tested: On 40Gbit link, one netperf -t TCP_STREAM BBR+fq: sg on: 26 Gbits/sec sg off: 15.7 Gbits/sec (was 2.3 Gbit before patch) BBR+pfifo_fast: sg on: 24.2 Gbits/sec sg off: 14.9 Gbits/sec (was 0.66 Gbit before patch !!! ) BBR+fq_codel: sg on: 24.4 Gbits/sec sg off: 15 Gbits/sec (was 0.66 Gbit before patch !!! ) Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21rds: send: mark expected switch fall-through in rds_rm_sizeGustavo A. R. Silva
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Addresses-Coverity-ID: 1465362 ("Missing break in switch") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-21net: sched: add em_ipt ematch for calling xtables matchesEyal Birger
The commit a new tc ematch for using netfilter xtable matches. This allows early classification as well as mirroning/redirecting traffic based on logic implemented in netfilter extensions. Current supported use case is classification based on the incoming IPSec state used during decpsulation using the 'policy' iptables extension (xt_policy). The module dynamically fetches the netfilter match module and calls it using a fake xt_action_param structure based on validated userspace provided parameters. As the xt_policy match does not access skb->data, no skb modifications are needed on match. Signed-off-by: Eyal Birger <eyal.birger@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-20x25: use %*ph to print small bufferAntonio Cardace
Use %*ph format to print small buffer as hex string. Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Antonio Cardace <anto.cardace@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-20devlink: Move size validation to coreArkadi Sharshevsky
Currently the size validation is done via a cb, which is unneeded. The size validation can be moved to core. The next patch will perform cleanup. Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-20net: Queue net_cleanup_work only if there is first net addedKirill Tkhai
When llist_add() returns false, cleanup_net() hasn't made its llist_del_all(), while the work has already been scheduled by the first queuer. So, we may skip queue_work() in this case. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-20net: Make cleanup_list and net::cleanup_list of llist typeKirill Tkhai
This simplifies cleanup queueing and makes cleanup lists to use llist primitives. Since llist has its own cmpxchg() ordering, cleanup_list_lock is not more need. Also, struct llist_node is smaller, than struct list_head, so we save some bytes in struct net with this patch. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-20net: Kill net_mutexKirill Tkhai
We take net_mutex, when there are !async pernet_operations registered, and read locking of net_sem is not enough. But we may get rid of taking the mutex, and just change the logic to write lock net_sem in such cases. This obviously reduces the number of lock operations, we do. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
2018-02-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Prevent index integer overflow in ptr_ring, from Jason Wang. 2) Program mvpp2 multicast filter properly, from Mikulas Patocka. 3) The bridge brport attribute file is write only and doesn't have a ->show() method, don't blindly invoke it. From Xin Long. 4) Inverted mask used in genphy_setup_forced(), from Ingo van Lil. 5) Fix multiple definition issue with if_ether.h UAPI header, from Hauke Mehrtens. 6) Fix GFP_KERNEL usage in atomic in RDS protocol code, from Sowmini Varadhan. 7) Revert XDP redirect support from thunderx driver, it is not implemented properly. From Jesper Dangaard Brouer. 8) Fix missing RTNL protection across some tipc operations, from Ying Xue. 9) Return the correct IV bytes in the TLS getsockopt code, from Boris Pismenny. 10) Take tclassid into consideration properly when doing FIB rule matching. From Stefano Brivio. 11) cxgb4 device needs more PCI VPD quirks, from Casey Leedom. 12) TUN driver doesn't align frags properly, and we can end up doing unaligned atomics on misaligned metadata. From Eric Dumazet. 13) Fix various crashes found using DEBUG_PREEMPT in rmnet driver, from Subash Abhinov Kasiviswanathan. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (56 commits) tg3: APE heartbeat changes mlxsw: spectrum_router: Do not unconditionally clear route offload indication net: qualcomm: rmnet: Fix possible null dereference in command processing net: qualcomm: rmnet: Fix warning seen with 64 bit stats net: qualcomm: rmnet: Fix crash on real dev unregistration sctp: remove the left unnecessary check for chunk in sctp_renege_events rxrpc: Work around usercopy check tun: fix tun_napi_alloc_frags() frag allocator udplite: fix partial checksum initialization skbuff: Fix comment mis-spelling. dn_getsockoptdecnet: move nf_{get/set}sockopt outside sock lock PCI/cxgb4: Extend T3 PCI quirk to T4+ devices cxgb4: fix trailing zero in CIM LA dump cxgb4: free up resources of pf 0-3 fib_semantics: Don't match route with mismatching tclassid NFC: llcp: Limit size of SDP URI tls: getsockopt return record sequence number tls: reset the crypto info if copy_from_user fails tls: retrun the correct IV in getsockopt docs: segmentation-offloads.txt: add SCTP info ...
2018-02-19tipc: don't call sock_release() in atomic contextPaolo Abeni
syzbot reported a scheduling while atomic issue at netns destruction time: BUG: sleeping function called from invalid context at net/core/sock.c:2769 in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3 5 locks held by kworker/u4:3/85: #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084 #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088 #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20 net/core/net_namespace.c:494 #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20 net/core/net_namespace.c:496 #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] spin_lock_bh include/linux/spinlock.h:315 [inline] #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>] tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685 CPU: 0 PID: 85 Comm: kworker/u4:3 Not tainted 4.16.0-rc1+ #230 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128 __might_sleep+0x95/0x190 kernel/sched/core.c:6081 lock_sock_nested+0x37/0x110 net/core/sock.c:2769 lock_sock include/net/sock.h:1463 [inline] tipc_release+0x103/0xff0 net/tipc/socket.c:572 sock_release+0x8d/0x1e0 net/socket.c:594 tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696 tipc_exit_net+0x15/0x40 net/tipc/core.c:96 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148 cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113 worker_thread+0x223/0x1990 kernel/workqueue.c:2247 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429 This is caused by tipc_topsrv_stop() releasing the listener socket with the idr lock held. This changeset addresses the issue moving the release operation outside such lock. Reported-and-tested-by: syzbot+749d9d87c294c00ca856@syzkaller.appspotmail.com Fixes: 0ef897be12b8 ("tipc: separate topology server listener socket from subcsriber sockets") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: ///jon Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19tipc: fix bug on error path in tipc_topsrv_kern_subscr()Jon Maloy
In commit cc1ea9ffadf7 ("tipc: eliminate struct tipc_subscriber") we re-introduced an old bug on the error path in the function tipc_topsrv_kern_subscr(). We now re-introduce the correction too. Reported-by: syzbot+f62e0f2a0ef578703946@syzkaller.appspotmail.com Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert iptable_filter_net_opsKirill Tkhai
These pernet_operations register and unregister net::ipv4.iptable_filter table. Since there are no packets in-flight at the time of exit method is working, iptables rules should not be touched. Also, pernet_operations should not send ipv4 packets each other. So, it's safe to mark them async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert ip_tables_net_ops, udplite6_net_ops and xt_net_opsKirill Tkhai
ip_tables_net_ops and udplite6_net_ops create and destroy /proc entries. xt_net_ops does nothing. So, we are able to mark them async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert ip6_frags_opsKirill Tkhai
Exit methods calls inet_frags_exit_net() with global ip6_frags as argument. So, after we make the pernet_operations async, a pair of exit methods may be called to iterate this hash table. Since there is inet_frag_worker(), which already may work in parallel with inet_frags_exit_net(), and it can make the same cleanup, that inet_frags_exit_net() does, it's safe. So we may mark these pernet_operations as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert fib6_net_ops, ipv6_addr_label_ops and ip6_segments_opsKirill Tkhai
These pernet_operations register and unregister tables and lists for packets forwarding. All of the entities are per-net. Init methods makes simple initializations, and since net is not visible for foreigners at the time it is working, it can't race with anything. Exit method is executed when there are only local devices, and there mustn't be packets in-flight. Also, it looks like no one pernet_operations want to send ipv6 packets to foreign net. The same reasons are for ipv6_addr_label_ops and ip6_segments_ops. So, we are able to mark all them as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert xfrm6_net_opsKirill Tkhai
These pernet_operations create sysctl tables and initialize net::xfrm.xfrm6_dst_ops used for routing. It doesn't look like another pernet_operations send ipv6 packets to foreign net namespaces, so it should be safe to mark the pernet_operations as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert ip6_flowlabel_net_opsKirill Tkhai
These pernet_operations create and destroy /proc entries. ip6_fl_purge() makes almost the same actions as timer ip6_fl_gc_timer does, and as it can be executed in parallel with ip6_fl_purge(), two parallel ip6_fl_purge() may be executed. So, we can mark it async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert ping_v6_net_opsKirill Tkhai
These pernet_operations only register and unregister /proc entries, so it's possible to mark them async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert ipv6_sysctl_net_opsKirill Tkhai
These pernet_operations create and destroy sysctl tables. They are not touched by another net pernet_operations. So, it's possible to execute them in parallel with others. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert tcpv6_net_opsKirill Tkhai
These pernet_operations create and destroy net::ipv6.tcp_sk socket, which is used in tcp_v6_send_response() only. It looks like foreign pernet_operations don't want to set ipv6 connection inside destroyed net, so this socket may be created in destroyed in parallel with anything else. inet_twsk_purge() is also safe for that, as described in patch for tcp_sk_ops. So, it's possible to mark them as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert fib6_rules_net_opsKirill Tkhai
These pernet_operations register and unregister net::ipv6.fib6_rules_ops, which are used for routing. It looks like there are no pernet_operations, which send ipv6 packages to another net, so we are able to mark them as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert ipv6_inetpeer_opsKirill Tkhai
net->ipv6.peers is dereferenced in three places via inet_getpeer_v6(), and it's used to handle skb. All the users of inet_getpeer_v6() do not look like be able to be called from foreign net pernet_operations, so we may mark them as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert raw6_net_ops, udplite6_net_ops, ipv6_proc_ops, if6_proc_net_ops ↵Kirill Tkhai
and ip6_route_net_late_ops These pernet_operations create and destroy /proc entries and safely may be converted and safely may be mark as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert icmpv6_sk_ops, ndisc_net_ops and igmp6_net_opsKirill Tkhai
These pernet_operations create and destroy net::ipv6.icmp_sk socket, used to send ICMP or error reply. Nobody can dereference the socket to handle a packet before net is initialized, as there is no routing; nobody can do that in parallel with exit, as all of devices are moved to init_net or destroyed and there are no packets it-flight. So, it's possible to mark these pernet_operations as async. The same for ndisc_net_ops and for igmp6_net_ops. The last one also creates and destroys /proc entries. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert ip6mr_net_opsKirill Tkhai
These pernet_operations create and destroy /proc entries, populate and depopulate net::rules_ops and multiroute table. All the structures are pernet, and they are not touched by foreign net pernet_operations. So, it's possible to mark them async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert cfg80211_pernet_opsKirill Tkhai
This patch finishes converting pernet_operations registered in net/wireless directory. These pernet_operations have only exit method, which moves devices to init_net. This action is not pernet_operations-specific, and function cfg80211_switch_netns() may be called all time during the system life. All necessary protection against concurrent cfg80211_pernet_exit() is made by rtnl_lock(). So, cfg80211_pernet_ops is able to be marked as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19net: Convert inet6_net_opsKirill Tkhai
init method initializes sysctl defaults, allocates percpu arrays and creates /proc entries. exit method reverts the above. There are no pernet_operations, which are interested in the above entities of foreign net namespace, so inet6_net_ops are able to be marked as async. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-19mac80211: Add tx ack signal support in sta infoVenkateswara Naralasetty
This allows users to get ack signal strength of last transmitted frame. Signed-off-by: Venkateswara Naralasetty <vnaralas@codeaurora.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-19cfg80211: send ack_signal to user in probe client responseVenkateswara Naralasetty
This patch provides support to get ack signal in probe client response and in station info from user. Signed-off-by: Venkateswara Naralasetty <vnaralas@codeaurora.org> [squash in compilation fixes] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-19mac80211: remove redundant initialization to pointer 'hdr'Colin Ian King
The pointer hrd is being initialized with a value that is never read and re-assigned a little later, hence the initialization is redundant and can be removed. Cleans up clang warning: net/mac80211/tx.c:1924:24: warning: Value stored to 'hdr' during its initialization is never read Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-19nl80211: Fix external_auth check for offloaded authenticationSrinivas Dasari
Unfortunately removal of the ext_feature flag in the last revision of the patch ended up negating the comparison and prevented the command from being processed (either nl80211_external_auth() or rdev_external_auth() returns -EOPNOTSUPP). Fix this by adding back the lost '!'. Fixes: 40cbfa90218b ("cfg80211/nl80211: Optional authentication offload to userspace") Signed-off-by: Srinivas Dasari <dasaris@codeaurora.org> Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-19nl80211: remove unnecessary genlmsg_cancel() callsJohannes Berg
If we free the message immediately, there's no reason to trim it back to the previous size. Done with spatch: @@ identifier msg, hdr; @@ -if (hdr) - genlmsg_cancel(msg, hdr); ... when != msg; nlmsg_free(msg); @@ identifier msg, hdr; @@ -genlmsg_cancel(msg, hdr); ... when != msg; nlmsg_free(msg); Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-02-16net: Only honor ifindex in IP_PKTINFO if non-0David Ahern
Only allow ifindex from IP_PKTINFO to override SO_BINDTODEVICE settings if the index is actually set in the message. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-16sctp: remove the left unnecessary check for chunk in sctp_renege_eventsXin Long
Commit fb23403536ea ("sctp: remove the useless check in sctp_renege_events") forgot to remove another check for chunk in sctp_renege_events. Dan found this when doing a static check. This patch is to remove that check, and also to merge two checks into one 'if statement'. Fixes: fb23403536ea ("sctp: remove the useless check in sctp_renege_events") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-16rxrpc: Work around usercopy checkDavid Howells
Due to a check recently added to copy_to_user(), it's now not permitted to copy from slab-held data to userspace unless the slab is whitelisted. This affects rxrpc_recvmsg() when it attempts to place an RXRPC_USER_CALL_ID control message in the userspace control message buffer. A warning is generated by usercopy_warn() because the source is the copy of the user_call_ID retained in the rxrpc_call struct. Work around the issue by copying the user_call_ID to a variable on the stack and passing that to put_cmsg(). The warning generated looks like: Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLUB object 'dmaengine-unmap-128' (offset 680, size 8)! WARNING: CPU: 0 PID: 1401 at mm/usercopy.c:81 usercopy_warn+0x7e/0xa0 ... RIP: 0010:usercopy_warn+0x7e/0xa0 ... Call Trace: __check_object_size+0x9c/0x1a0 put_cmsg+0x98/0x120 rxrpc_recvmsg+0x6fc/0x1010 [rxrpc] ? finish_wait+0x80/0x80 ___sys_recvmsg+0xf8/0x240 ? __clear_rsb+0x25/0x3d ? __clear_rsb+0x15/0x3d ? __clear_rsb+0x25/0x3d ? __clear_rsb+0x15/0x3d ? __clear_rsb+0x25/0x3d ? __clear_rsb+0x15/0x3d ? __clear_rsb+0x25/0x3d ? __clear_rsb+0x15/0x3d ? finish_task_switch+0xa6/0x2b0 ? trace_hardirqs_on_caller+0xed/0x180 ? _raw_spin_unlock_irq+0x29/0x40 ? __sys_recvmsg+0x4e/0x90 __sys_recvmsg+0x4e/0x90 do_syscall_64+0x7a/0x220 entry_SYSCALL_64_after_hwframe+0x26/0x9b Reported-by: Jonathan Billings <jsbillings@jsbillings.org> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Tested-by: Jonathan Billings <jsbillings@jsbillings.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-16net: sched: act: mirred: add extack supportAlexander Aring
This patch adds extack support for TC mirred action. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-02-16net: sched: act: handle extack in tcf_generic_walkerAlexander Aring
This patch adds extack handling for a common used TC act function "tcf_generic_walker()" to add an extack message on failures. The tcf_generic_walker() function can fail if get a invalid command different than DEL and GET. The naming "action" here is wrong, the correct naming would be command. Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Alexander Aring <aring@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>