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2020-04-07Merge tag 'for-linus-5.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs Pull UBI and UBIFS updates from Richard Weinberger: - Fix for memory leaks around UBIFS orphan handling - Fix for memory leaks around UBI fastmap - Remove zero-length array from ubi-media.h - Fix for TNC lookup in UBIFS orphan code * tag 'for-linus-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: ubi: ubi-media.h: Replace zero-length array with flexible-array member ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len ubi: fastmap: Only produce the initial anchor PEB when fastmap is used ubi: fastmap: Free unused fastmap anchor peb during detach ubifs: ubifs_add_orphan: Fix a memory leak bug ubifs: ubifs_jnl_write_inode: Fix a memory leak bug ubifs: Fix ubifs_tnc_lookup() usage in do_kill_orphans()
2020-03-30ubi: ubi-media.h: Replace zero-length array with flexible-array memberGustavo A. R. Silva
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] 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 <gustavo@embeddedor.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2020-03-30ubi: fastmap: Only produce the initial anchor PEB when fastmap is usedHou Tao
Don't produce the initial anchor PEB when ubi device is read-only or fastmap is disabled, else the resulting PEB will be unusable to any volume. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2020-03-30ubi: fastmap: Free unused fastmap anchor peb during detachHou Tao
When CONFIG_MTD_UBI_FASTMAP is enabled, fm_anchor will be assigned a free PEB during ubi_wl_init() or ubi_update_fastmap(). However if fastmap is not used or disabled on the MTD device, ubi_wl_entry related with the PEB will not be freed during detach. So Fix it by freeing the unused fastmap anchor during detach. Fixes: f9c34bb52997 ("ubi: Fix producing anchor PEBs") Reported-by: syzbot+f317896aae32eb281a58@syzkaller.appspotmail.com Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2020-03-30mtd: Convert fallthrough comments into statementsMiquel Raynal
Use Joe Perches cvt_fallthrough.pl script to convert /* fallthrough */ comments (and its derivatives) into a fallthrough; statement. This automatically drops useless ones. Do it MTD-wide. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Vignesh Raghavendra <vigneshr@ti.com> Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com> Acked-by: Richard Weinberger <richard@nod.at> Link: https://lore.kernel.org/linux-mtd/20200325212115.14170-1-miquel.raynal@bootlin.com
2020-02-04treewide: remove redundant IS_ERR() before error code checkMasahiro Yamada
'PTR_ERR(p) == -E*' is a stronger condition than IS_ERR(p). Hence, IS_ERR(p) is unneeded. The semantic patch that generates this commit is as follows: // <smpl> @@ expression ptr; constant error_code; @@ -IS_ERR(ptr) && (PTR_ERR(ptr) == - error_code) +PTR_ERR(ptr) == - error_code // </smpl> Link: http://lkml.kernel.org/r/20200106045833.1725-1-masahiroy@kernel.org Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Cc: Julia Lawall <julia.lawall@lip6.fr> Acked-by: Stephen Boyd <sboyd@kernel.org> [drivers/clk/clk.c] Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> [GPIO] Acked-by: Wolfram Sang <wsa@the-dreams.de> [drivers/i2c] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [acpi/scan.c] Acked-by: Rob Herring <robh@kernel.org> Cc: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-01-19ubi: Fix an error pointer dereference in error handling codeDan Carpenter
If "seen_pebs = init_seen(ubi);" fails then "seen_pebs" is an error pointer and we try to kfree() it which results in an Oops. This patch re-arranges the error handling so now it only frees things which have been allocated successfully. Fixes: daef3dd1f0ae ("UBI: Fastmap: Add self check to detect absent PEBs") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2020-01-16ubi: Free the normal volumes in error paths of ubi_attach_mtd_dev()Hou Tao
The allocated normal volumes saved in ubi->volumes are not freed in the error paths in ubi_attach_mtd_dev() and its callees (e.g. ubi_attach() and ubi_read_volume_table()). These normal volumes should be freed through kill_volumes() and vol_release(), but ubi_attach_mtd_dev() may fail before calling uif_init(), and there will be memory leaks. So adding a new helper ubi_free_all_volumes() to free the normal and the internal volumes. And in order to prevent double-free of volume, reset ubi->volumes[i] to NULL after freeing. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2020-01-16ubi: Check the presence of volume before call ubi_fastmap_destroy_checkmap()Hou Tao
Else there may be oops when fastmap is enabled and init_volumes() fails. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2020-01-16ubi: wl: Remove set but not used variable 'prev_e'YueHaibing
Fixes gcc '-Wunused-but-set-variable' warning: drivers/mtd/ubi/wl.c: In function 'find_wl_entry': drivers/mtd/ubi/wl.c:322:27: warning: variable 'prev_e' set but not used [-Wunused-but-set-variable] It's not used any more now, so remove it. Fixes: f9c34bb52997 ("ubi: Fix producing anchor PEBs") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2020-01-16ubi: fastmap: Fix inverted logic in seen selfcheckSascha Hauer
set_seen() sets the bit corresponding to the PEB number in the bitmap, so when self_check_seen() wants to find PEBs that haven't been seen we have to print the PEBs that have their bit cleared, not the ones which have it set. Fixes: 5d71afb00840 ("ubi: Use bitmaps in Fastmap self-check code") Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
2019-12-02Merge tag 'upstream-5.5-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs Pull UBI/UBIFS/JFFS2 updates from Richard Weinberger: "This pull request contains mostly fixes for UBI, UBIFS and JFFS2: UBI: - Fix a regression around producing a anchor PEB for fastmap. Due to a change in our locking fastmap was unable to produce fresh anchors an re-used the existing one a way to often. UBIFS: - Fixes for endianness. A few places blindly assumed little endian. - Fix for a memory leak in the orphan code. - Fix for a possible crash during a commit. - Revert a wrong bugfix. JFFS2: - Revert a bad bugfix (false positive from a code checking tool)" * tag 'upstream-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: Revert "jffs2: Fix possible null-pointer dereferences in jffs2_add_frag_to_fragtree()" ubi: Fix producing anchor PEBs ubifs: ubifs_tnc_start_commit: Fix OOB in layout_in_gaps ubifs: do_kill_orphans: Fix a memory leak bug Revert "ubifs: Fix memory leak bug in alloc_ubifs_info() error path" ubifs: Fix type of sup->hash_algo ubifs: Fixed missed le64_to_cpu() in journal ubifs: Force prandom result to __le32 ubifs: Remove obsolete TODO from dfs_file_write() ubi: Fix warning static is not at beginning of declaration ubi: Print skip_check in ubi_dump_vol_info()
2019-12-01Merge tag 'compat-ioctl-5.5' of ↵Linus Torvalds
git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground Pull removal of most of fs/compat_ioctl.c from Arnd Bergmann: "As part of the cleanup of some remaining y2038 issues, I came to fs/compat_ioctl.c, which still has a couple of commands that need support for time64_t. In completely unrelated work, I spent time on cleaning up parts of this file in the past, moving things out into drivers instead. After Al Viro reviewed an earlier version of this series and did a lot more of that cleanup, I decided to try to completely eliminate the rest of it and move it all into drivers. This series incorporates some of Al's work and many patches of my own, but in the end stops short of actually removing the last part, which is the scsi ioctl handlers. I have patches for those as well, but they need more testing or possibly a rewrite" * tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground: (42 commits) scsi: sd: enable compat ioctls for sed-opal pktcdvd: add compat_ioctl handler compat_ioctl: move SG_GET_REQUEST_TABLE handling compat_ioctl: ppp: move simple commands into ppp_generic.c compat_ioctl: handle PPPIOCGIDLE for 64-bit time_t compat_ioctl: move PPPIOCSCOMPRESS to ppp_generic compat_ioctl: unify copy-in of ppp filters tty: handle compat PPP ioctls compat_ioctl: move SIOCOUTQ out of compat_ioctl.c compat_ioctl: handle SIOCOUTQNSD af_unix: add compat_ioctl support compat_ioctl: reimplement SG_IO handling compat_ioctl: move WDIOC handling into wdt drivers fs: compat_ioctl: move FITRIM emulation into file systems gfs2: add compat_ioctl support compat_ioctl: remove unused convert_in_user macro compat_ioctl: remove last RAID handling code compat_ioctl: remove /dev/raw ioctl translation compat_ioctl: remove PCI ioctl translation compat_ioctl: remove joystick ioctl translation ...
2019-11-17ubi: Fix producing anchor PEBsSascha Hauer
When a new fastmap is about to be written UBI must make sure it has a free block for a fastmap anchor available. For this ubi_update_fastmap() calls ubi_ensure_anchor_pebs(). This stopped working with 2e8f08deabbc ("ubi: Fix races around ubi_refill_pools()"), with this commit the wear leveling code is blocked and can no longer produce free PEBs. UBI then more often than not falls back to write the new fastmap anchor to the same block it was already on which means the same erase block gets erased during each fastmap write and wears out quite fast. As the locking prevents us from producing the anchor PEB when we actually need it, this patch changes the strategy for creating the anchor PEB. We no longer create it on demand right before we want to write a fastmap, but instead we create an anchor PEB right after we have written a fastmap. This gives us enough time to produce a new anchor PEB before it is needed. To make sure we have an anchor PEB for the very first fastmap write we call ubi_ensure_anchor_pebs() during initialisation as well. Fixes: 2e8f08deabbc ("ubi: Fix races around ubi_refill_pools()") Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
2019-11-17ubi: Fix warning static is not at beginning of declarationRishi Gupta
Compiler generates following warning when kernel is built with W=1: drivers/mtd/ubi/ubi.h:971:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration] This commit fixes this by correctly ordering keywords. Signed-off-by: Rishi Gupta <gupt21@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2019-11-17ubi: Print skip_check in ubi_dump_vol_info()Stefan Roese
It might be interesting, if "skip_check" is set or not, so lets print this flag in ubi_dump_vol_info() as well. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Richard Weinberger <richard@nod.at> Cc: Boris Brezillon <boris.brezillon@collabora.com> Cc: Heiko Schocher <hs@denx.de> Signed-off-by: Richard Weinberger <richard@nod.at>
2019-11-14mtd: no need to check return value of debugfs_create functionsGreg Kroah-Hartman
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: David Woodhouse <dwmw2@infradead.org> Cc: Brian Norris <computersforpeace@gmail.com> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Miquel Raynal <miquel.raynal@bootlin.com> Cc: Richard Weinberger <richard@nod.at> Cc: Vignesh Raghavendra <vigneshr@ti.com> Cc: Artem Bityutskiy <dedekind1@gmail.com> Cc: linux-mtd@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
2019-10-23compat_ioctl: move drivers to compat_ptr_ioctlArnd Bergmann
Each of these drivers has a copy of the same trivial helper function to convert the pointer argument and then call the native ioctl handler. We now have a generic implementation of that, so use it. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com> Reviewed-by: Jiri Kosina <jkosina@suse.cz> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-09-15ubi: block: Warn if volume size is not multiple of 512Richard Weinberger
If volume size is not a multiple of 512, ubi block cuts off the last bytes of an volume since the block layer works on 512 byte sectors. This can happen especially on NOR flash with minimal io size of 1. To avoid unpleasant surprises, print a warning. Signed-off-by: Richard Weinberger <richard@nod.at>
2019-09-15ubi: ubi_wl_get_peb: Increase the number of attempts while getting PEBZhihao Cheng
Running stress test io_paral (A pressure ubi test in mtd-utils) on an UBI device with fewer PEBs (fastmap enabled) may cause ENOSPC errors and make UBI device read-only, but there are still free PEBs on the UBI device. This problem can be easily reproduced by performing the following steps on a 2-core machine: $ modprobe nandsim first_id_byte=0x20 second_id_byte=0x33 parts=80 $ modprobe ubi mtd="0,0" fm_autoconvert $ ./io_paral /dev/ubi0 We may see the following verbose: (output) [io_paral] update_volume():108: failed to write 380 bytes at offset 95920 of volume 2 [io_paral] update_volume():109: update: 97088 bytes [io_paral] write_thread():227: function pwrite() failed with error 28 (No space left on device) [io_paral] write_thread():229: cannot write 15872 bytes to offs 31744, wrote -1 (dmesg) ubi0 error: ubi_wl_get_peb [ubi]: Unable to get a free PEB from user WL pool ubi0 warning: ubi_eba_write_leb [ubi]: switch to read-only mode CPU: 0 PID: 2027 Comm: io_paral Not tainted 5.3.0-rc2-00001-g5986cd0 #9 ubi0 warning: try_write_vid_and_data [ubi]: failed to write VID header to LEB 2:5, PEB 18 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0 -0-ga698c8995f-prebuilt.qemu.org 04/01/2014 Call Trace: dump_stack+0x85/0xba ubi_eba_write_leb+0xa1e/0xa40 [ubi] vol_cdev_write+0x307/0x520 [ubi] vfs_write+0xfa/0x280 ksys_pwrite64+0xc5/0xe0 __x64_sys_pwrite64+0x22/0x30 do_syscall_64+0xbf/0x440 In function ubi_wl_get_peb, the operation of filling the pool (ubi_update_fastmap) with free PEBs and fetching a free PEB from the pool is not atomic. After thread A filling the pool with free PEB, free PEB may be taken away by thread B. When thread A checks the expression again, the condition is still unsatisfactory. At this time, there may still be free PEBs on UBI that can be filled into the pool. This patch increases the number of attempts to obtain PEB. An extreme case (No free PEBs left after creating test volumes) has been tested on different type of machines for 100 times. The biggest number of attempts are shown below: x86_64 arm64 2-core 4 4 4-core 8 4 8-core 4 4 Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2019-09-15ubi: Don't do anchor move within fastmap areaRichard Weinberger
To make sure that Fastmap can use a PEB within the first 64 PEBs, UBI moves blocks away from that area. It uses regular wear-leveling for that job. An anchor move can be triggered if no PEB is free in this area or because of anticipation. In the latter case it can happen that UBI decides to move a block but finds a free PEB within the same area. This case is in vain an increases only erase counters. Catch this case and cancel wear-leveling if this happens. Signed-off-by: Richard Weinberger <richard@nod.at>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 286Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation version 2 this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 97 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.025053186@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-07ubi: wl: Fix uninitialized variableGustavo A. R. Silva
There is a potential execution path in which variable *err* is compared against UBI_IO_BITFLIPS without being properly initialized previously. Fix this by initializing variable *err* to 0. Addresses-Coverity-ID: 1477298 "(Uninitialized scalar variable") Fixes: 663586c0a892 ("ubi: Expose the bitrot interface") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2019-03-05ubi: wl: Silence uninitialized variable warningDan Carpenter
This condition needs to be fipped around because "err" is uninitialized when "force" is set. The Smatch static analysis tool complains and UBsan will also complain at runtime. Fixes: 663586c0a892 ("ubi: Expose the bitrot interface") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2019-02-24ubi: Expose the bitrot interfaceRichard Weinberger
Using UBI_IOCRPEB and UBI_IOCSPEB userspace can force reading and scrubbing of PEBs. In case of bitflips UBI will automatically take action and move data to a different PEB. This interface allows a daemon to foster your NAND. Signed-off-by: Richard Weinberger <richard@nod.at>
2019-02-24ubi: Introduce in_pq()Richard Weinberger
This function works like in_wl_tree() but checks whether an ubi_wl_entry is currently in the protection queue. We need this function to query the current state of an ubi_wl_entry. Signed-off-by: Richard Weinberger <richard@nod.at>
2018-12-13ubi: Do not drop UBI device reference before usingPan Bian
The UBI device reference is dropped but then the device is used as a parameter of ubi_err. The bug is introduced in changing ubi_err's behavior. The old ubi_err does not require a UBI device as its first parameter, but the new one does. Fixes: 32608703310 ("UBI: Extend UBI layer debug/messaging capabilities") Signed-off-by: Pan Bian <bianpan2016@163.com> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-12-13ubi: Put MTD device after it is not usedPan Bian
The MTD device reference is dropped via put_mtd_device, however its field ->index is read and passed to ubi_msg. To fix this, the patch moves the reference dropping after calling ubi_msg. Signed-off-by: Pan Bian <bianpan2016@163.com> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-10-23ubi: Mark expected switch fall-throughsGustavo A. R. Silva
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Addresses-Coverity-ID: 1373884 ("Missing break in switch") Addresses-Coverity-ID: 114869 ("Missing break in switch") Addresses-Coverity-ID: 114870 ("Missing break in switch") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15ubi: expose the volume CRC check skip flagQuentin Schulz
Now that we have the logic for skipping CRC check for static UBI volumes in the core, let's expose it to users. This makes use of a padding byte in the volume description data structure as a flag. This flag only tell for now whether we should skip the CRC check of a volume. This checks the UBI volume for which we are trying to skip the CRC check is static. Let's also make sure that the flags passed to verify_mkvol_req are valid. We voluntarily do not take into account the skip_check flag in vol_cdev_write() as we want to make sure what we wrote was correctly written. Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15ubi: provide a way to skip CRC checksQuentin Schulz
Some users of static UBI volumes implement their own integrity check, thus making the volume CRC check done at open time useless. For instance, this is the case when one use the ubiblock + dm-verity + squashfs combination, where dm-verity already checks integrity of the block device but this time at the block granularity instead of verifying the whole volume. Skipping this test drastically improves the boot-time. Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Richard Weinberger <richard@nod.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-08-15ubi: Initialize Fastmap checkmapping correctlyRichard Weinberger
We cannot do it last, otherwithse it will be skipped for dynamic volumes. Reported-by: Lachmann, Juergen <juergen.lachmann@harman.com> Fixes: 34653fd8c46e ("ubi: fastmap: Check each mapping only once") Signed-off-by: Richard Weinberger <richard@nod.at>
2018-06-12treewide: kzalloc() -> kcalloc()Kees Cook
The kzalloc() function has a 2-factor argument form, kcalloc(). This patch replaces cases of: kzalloc(a * b, gfp) with: kcalloc(a * b, gfp) as well as handling cases of: kzalloc(a * b * c, gfp) with: kzalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kzalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kzalloc(4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kzalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kzalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kzalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(char) * COUNT + COUNT , ...) | kzalloc( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kzalloc + kcalloc ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kzalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kzalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kzalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kzalloc(C1 * C2 * C3, ...) | kzalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kzalloc( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kzalloc(sizeof(THING) * C2, ...) | kzalloc(sizeof(TYPE) * C2, ...) | kzalloc(C1 * C2 * C3, ...) | kzalloc(C1 * C2, ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - (E1) * E2 + E1, E2 , ...) | - kzalloc + kcalloc ( - (E1) * (E2) + E1, E2 , ...) | - kzalloc + kcalloc ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12treewide: kmalloc() -> kmalloc_array()Kees Cook
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This patch replaces cases of: kmalloc(a * b, gfp) with: kmalloc_array(a * b, gfp) as well as handling cases of: kmalloc(a * b * c, gfp) with: kmalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kmalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kmalloc(4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The tools/ directory was manually excluded, since it has its own implementation of kmalloc(). The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kmalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kmalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kmalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kmalloc( - sizeof(u8) * COUNT + COUNT , ...) | kmalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kmalloc( - sizeof(char) * COUNT + COUNT , ...) | kmalloc( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kmalloc + kmalloc_array ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kmalloc + kmalloc_array ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kmalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kmalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kmalloc( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kmalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kmalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kmalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kmalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kmalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kmalloc( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kmalloc(C1 * C2 * C3, ...) | kmalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kmalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kmalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kmalloc( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kmalloc(sizeof(THING) * C2, ...) | kmalloc(sizeof(TYPE) * C2, ...) | kmalloc(C1 * C2 * C3, ...) | kmalloc(C1 * C2, ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kmalloc + kmalloc_array ( - (E1) * E2 + E1, E2 , ...) | - kmalloc + kmalloc_array ( - (E1) * (E2) + E1, E2 , ...) | - kmalloc + kmalloc_array ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-07mtd: ubi: Update ubi-media.h to dual licenseLionel Debieve
Update license template using SPDX. Move the global layout of UBI headers to dual license helping UBI to be the standard solution for raw NAND management. Signed-off-by: Lionel Debieve <lionel.debieve@st.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Artem Bityutskiy <dedekind1@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-06-07ubi: fastmap: Detect EBA mismatches on-the-flyRichard Weinberger
Now we have the machinery to detect EBA mismatches on-the-fly by comparing the in-memory volume ID and LEB number with the found VID header. This helps to detect malfunction of Fastmap. Signed-off-by: Richard Weinberger <richard@nod.at>
2018-06-07ubi: fastmap: Check each mapping only onceRichard Weinberger
Maintain a bitmap to keep track of which LEB->PEB mapping was checked already. That way we have to read back VID headers only once. Signed-off-by: Richard Weinberger <richard@nod.at>
2018-06-07ubi: fastmap: Correctly handle interrupted erasures in EBARichard Weinberger
Fastmap cannot track the LEB unmap operation, therefore it can happen that after an interrupted erasure the mapping still looks good from Fastmap's point of view, while reading from the PEB will cause an ECC error and confuses the upper layer. Instead of teaching users of UBI how to deal with that, we read back the VID header and check for errors. If the PEB is empty or shows ECC errors we fixup the mapping and schedule the PEB for erasure. Fixes: dbb7d2a88d2a ("UBI: Add fastmap core") Cc: <stable@vger.kernel.org> Reported-by: martin bayern <Martinbayern@outlook.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-06-07ubi: fastmap: Cancel work upon detachRichard Weinberger
Ben Hutchings pointed out that 29b7a6fa1ec0 ("ubi: fastmap: Don't flush fastmap work on detach") does not really fix the problem, it just reduces the risk to hit the race window where fastmap work races against free()'ing ubi->volumes[]. The correct approach is making sure that no more fastmap work is in progress before we free ubi data structures. So we cancel fastmap work right after the ubi background thread is stopped. By setting ubi->thread_enabled to zero we make sure that no further work tries to wake the thread. Fixes: 29b7a6fa1ec0 ("ubi: fastmap: Don't flush fastmap work on detach") Fixes: 74cdaf24004a ("UBI: Fastmap: Fix memory leaks while closing the WL sub-system") Cc: stable@vger.kernel.org Cc: Ben Hutchings <ben.hutchings@codethink.co.uk> Cc: Martin Townsend <mtownsend1973@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-04-11Merge tag 'tags/upstream-4.17-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds
Pull UBI and UBIFS updates from Richard Weinberger: "Minor bug fixes and improvements" * tag 'tags/upstream-4.17-rc1' of git://git.infradead.org/linux-ubifs: ubi: Reject MLC NAND ubifs: Remove useless parameter of lpt_heap_replace ubifs: Constify struct ubifs_lprops in scan_for_leb_for_idx ubifs: remove unnecessary assignment ubi: Fix error for write access ubi: fastmap: Don't flush fastmap work on detach ubifs: Check ubifs_wbuf_sync() return code
2018-04-04ubi: Reject MLC NANDRichard Weinberger
While UBI and UBIFS seem to work at first sight with MLC NAND, you will most likely lose all your data upon a power-cut or due to read/write disturb. In order to protect users from bad surprises, refuse to attach to MLC NAND. Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Boris Brezillon <boris.brezillon@bootlin.com> Acked-by: Artem Bityutskiy <dedekind1@gmail.com>
2018-04-04ubi: Fix error for write accessRomain Izard
When opening a device with write access, ubiblock_open returns an error code. Currently, this error code is -EPERM, but this is not the right value. The open function for other block devices returns -EROFS when opening read-only devices with FMODE_WRITE set. When used with dm-verity, the veritysetup userspace tool is expecting EROFS, and refuses to use the ubiblock device. Use -EROFS for ubiblock as well. As a result, veritysetup accepts the ubiblock device as valid. Cc: stable@vger.kernel.org Fixes: 9d54c8a33eec (UBI: R/O block driver on top of UBI volumes) Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-04-04ubi: fastmap: Don't flush fastmap work on detachRichard Weinberger
At this point UBI volumes have already been free()'ed and fastmap can no longer access these data structures. Reported-by: Martin Townsend <mtownsend1973@gmail.com> Fixes: 74cdaf24004a ("UBI: Fastmap: Fix memory leaks while closing the WL sub-system") Cc: stable@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>
2018-03-21mtd: Stop updating erase_info->state and calling mtd_erase_callback()Boris Brezillon
MTD users are no longer checking erase_info->state to determine if the erase operation failed or succeeded. Moreover, mtd_erase_callback() is now a NOP. We can safely get rid of all mtd_erase_callback() calls and all erase_info->state assignments. While at it, get rid of the erase_info->state field, all MTD_ERASE_XXX definitions and the mtd_erase_callback() function. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Richard Weinberger <richard@nod.at> Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Bert Kenward <bkenward@solarflare.com> --- Changes in v2: - Address a few coding style issues (reported by Miquel) - Remove comments that are no longer valid (reported by Miquel)
2018-03-15mtd: Unconditionally update ->fail_addr and ->addr in part_erase()Boris Brezillon
->fail_addr and ->addr can be updated no matter the result of parent->_erase(), we just need to remove the code doing the same thing in mtd_erase_callback() to avoid adjusting those fields twice. Note that this can be done because all MTD users have been converted to not pass an erase_info->callback() and are thus only taking the ->addr_fail and ->addr fields into account after part_erase() has returned. While we're at it, get rid of the erase_info->mtd field which was only needed to let mtd_erase_callback() get the partition device back. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Richard Weinberger <richard@nod.at>
2018-03-15mtd: Stop assuming mtd_erase() is asynchronousBoris Brezillon
None of the mtd->_erase() implementations work in an asynchronous manner, so let's simplify MTD users that call mtd_erase(). All they need to do is check the value returned by mtd_erase() and assume that != 0 means failure. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Richard Weinberger <richard@nod.at>
2018-01-18ubi: block: Fix locking for idr_alloc/idr_removeBradley Bolen
This fixes a race with idr_alloc where gd->first_minor can be set to the same value for two simultaneous calls to ubiblock_create. Each instance calls device_add_disk with the same first_minor. device_add_disk calls bdi_register_owner which generates several warnings. WARNING: CPU: 1 PID: 179 at kernel-source/fs/sysfs/dir.c:31 sysfs_warn_dup+0x68/0x88 sysfs: cannot create duplicate filename '/devices/virtual/bdi/252:2' WARNING: CPU: 1 PID: 179 at kernel-source/lib/kobject.c:240 kobject_add_internal+0x1ec/0x2f8 kobject_add_internal failed for 252:2 with -EEXIST, don't try to register things with the same name in the same directory WARNING: CPU: 1 PID: 179 at kernel-source/fs/sysfs/dir.c:31 sysfs_warn_dup+0x68/0x88 sysfs: cannot create duplicate filename '/dev/block/252:2' However, device_add_disk does not error out when bdi_register_owner returns an error. Control continues until reaching blk_register_queue. It then BUGs. kernel BUG at kernel-source/fs/sysfs/group.c:113! [<c01e26cc>] (internal_create_group) from [<c01e2950>] (sysfs_create_group+0x20/0x24) [<c01e2950>] (sysfs_create_group) from [<c00e3d38>] (blk_trace_init_sysfs+0x18/0x20) [<c00e3d38>] (blk_trace_init_sysfs) from [<c02bdfbc>] (blk_register_queue+0xd8/0x154) [<c02bdfbc>] (blk_register_queue) from [<c02cec84>] (device_add_disk+0x194/0x44c) [<c02cec84>] (device_add_disk) from [<c0436ec8>] (ubiblock_create+0x284/0x2e0) [<c0436ec8>] (ubiblock_create) from [<c0427bb8>] (vol_cdev_ioctl+0x450/0x554) [<c0427bb8>] (vol_cdev_ioctl) from [<c0189110>] (vfs_ioctl+0x30/0x44) [<c0189110>] (vfs_ioctl) from [<c01892e0>] (do_vfs_ioctl+0xa0/0x790) [<c01892e0>] (do_vfs_ioctl) from [<c0189a14>] (SyS_ioctl+0x44/0x68) [<c0189a14>] (SyS_ioctl) from [<c0010640>] (ret_fast_syscall+0x0/0x34) Locking idr_alloc/idr_remove removes the race and keeps gd->first_minor unique. Fixes: 2bf50d42f3a4 ("UBI: block: Dynamically allocate minor numbers") Cc: stable@vger.kernel.org Signed-off-by: Bradley Bolen <bradleybolen@gmail.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2018-01-18mtd: ubi: wl: Fix error return code in ubi_wl_init()Wei Yongjun
Fix to return error code -ENOMEM from the kmem_cache_alloc() error handling case instead of 0, as done elsewhere in this function. Fixes: f78e5623f45b ("ubi: fastmap: Erase outdated anchor PEBs during attach") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Richard Weinberger <richard@nod.at>
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