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WARNING in __brelse (3)

Status: upstream: reported C repro on 2023/07/26 14:30
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+ce3af36144a13b018cc7@syzkaller.appspotmail.com
First crash: 664d, last: 64d
Cause bisection: introduced by (bisect log) :
commit f6e2c20ca7604e6a267c93a511d19dda72573be1
Author: Liu Shixin <liushixin2@huawei.com>
Date: Fri Apr 29 21:38:04 2022 +0000

  fs: sysv: check sbi->s_firstdatazone in complete_read_super

Crash: WARNING in invalidate_bh_lru (log)
Repro: C syz .config
  
Fix bisection: fixed by (bisect log) :
commit 6f861765464f43a71462d52026fbddfc858239a5
Author: Jan Kara <jack@suse.cz>
Date: Wed Nov 1 17:43:10 2023 +0000

  fs: Block writes to mounted block devices

  
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[syzbot] Monthly exfat report (Jan 2025) 0 (1) 2025/01/07 14:54
[syzbot] Monthly exfat report (Dec 2024) 0 (1) 2024/12/07 16:12
[syzbot] [fs?] WARNING in __brelse (3) 0 (2) 2024/02/15 15:55
[PATCH 0/1 ] fs: Warming in __brelse 1 (1) 2023/08/16 16:40
▶ ▼ Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 WARNING in __brelse C 6 2235d 2225d 0/3 public: reported C repro on 2019/04/14 00:00
upstream WARNING in __brelse udf C inconclusive 22 819d 961d 22/28 fixed on 2023/02/24 13:50
linux-4.14 WARNING in __brelse vfs udf C 6 822d 928d 0/1 upstream: reported C repro on 2022/10/31 19:01
linux-6.1 WARNING in __brelse 8 381d 439d 0/3 auto-obsoleted due to no activity on 2024/08/08 10:26
linux-5.15 WARNING in __brelse (2) 10 65d 287d 0/3 upstream: reported on 2024/08/02 08:59
linux-6.1 WARNING in __brelse (2) 4 123d 175d 0/3 auto-obsoleted due to no activity on 2025/04/23 19:37
android-414 WARNING in __brelse C 10 2235d 2227d 0/1 public: reported C repro on 2019/04/12 00:00
upstream WARNING in __brelse (2) udf 1 811d 807d 0/28 auto-obsoleted due to no activity on 2023/06/25 16:51
linux-5.15 WARNING in __brelse 1 762d 762d 0/3 auto-obsoleted due to no activity on 2023/08/14 05:07
linux-4.19 WARNING in __brelse vfs reiserfs ext4 udf C 43 803d 959d 0/1 upstream: reported C repro on 2022/10/01 01:04
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/04/21 04:33 24m retest repro upstream OK log
2025/02/10 04:06 15m retest repro upstream report log
2025/02/10 03:22 25m retest repro upstream OK log
2025/02/10 03:22 28m retest repro upstream OK log
2024/08/26 08:31 18m retest repro upstream report log
2024/06/17 08:10 16m retest repro upstream error
2024/04/08 07:48 16m retest repro upstream report log
2024/02/15 13:04 20m retest repro upstream OK log
2024/01/13 19:03 21m retest repro upstream OK log
2023/08/09 06:58 28m andrew.kanner@gmail.com upstream report log
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2024/02/15 07:46 8h07m bisect fix upstream OK (1) job log
2023/12/06 04:05 3h19m bisect fix upstream OK (0) job log log
2023/11/05 08:44 1h36m bisect fix upstream OK (0) job log log
2023/10/06 02:15 1h24m bisect fix upstream OK (0) job log log

Sample crash report:
loop0: detected capacity change from 0 to 128
oldfs: cannot read superblock
------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 5068 at fs/buffer.c:1235 __brelse fs/buffer.c:1235 [inline]
WARNING: CPU: 0 PID: 5068 at fs/buffer.c:1235 __brelse+0x6d/0xb0 fs/buffer.c:1229
Modules linked in:
CPU: 0 PID: 5068 Comm: syz-executor201 Not tainted 6.7.0-rc7-syzkaller-00041-gf016f7547aee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__brelse fs/buffer.c:1235 [inline]
RIP: 0010:__brelse+0x6d/0xb0 fs/buffer.c:1229
Code: 84 d2 75 52 44 8b 63 60 31 ff 44 89 e6 e8 0b 36 89 ff 45 85 e4 75 20 e8 91 3a 89 ff 90 48 c7 c7 c0 8b dd 8a e8 34 7c 4f ff 90 <0f> 0b 90 90 5b 5d 41 5c e9 76 3a 89 ff e8 71 3a 89 ff be 04 00 00
RSP: 0018:ffffc900039af8c8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff888071dc30e8 RCX: ffffffff814db519
RDX: ffff88801cf75940 RSI: ffffffff814db526 RDI: 0000000000000001
RBP: ffff888071dc3148 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888071dc30e8 R14: dffffc0000000000 R15: ffff8880b983d8c0
FS:  00005555561ba380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff76d1f1b10 CR3: 00000000711fa000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 brelse include/linux/buffer_head.h:312 [inline]
 __invalidate_bh_lrus fs/buffer.c:1487 [inline]
 invalidate_bh_lru+0xa2/0x190 fs/buffer.c:1500
 csd_do_func kernel/smp.c:133 [inline]
 smp_call_function_many_cond+0x1214/0x1550 kernel/smp.c:846
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
 invalidate_bdev+0x95/0xd0 block/bdev.c:85
 invalidate_disk+0x41/0x110 block/genhd.c:744
 __loop_clr_fd+0x259/0x8f0 drivers/block/loop.c:1164
 loop_clr_fd drivers/block/loop.c:1257 [inline]
 lo_ioctl+0x5d8/0x1a50 drivers/block/loop.c:1563
 blkdev_ioctl+0x2f3/0x760 block/ioctl.c:633
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd41f2ea4bb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffc39ce91f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000016 RCX: 00007fd41f2ea4bb
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004
RBP: 0000000000000004 R08: 00007ffc39ce92a0 R09: 0000000000009e47
R10: 0000000000000404 R11: 0000000000000246 R12: 0000000000000404
R13: 00007ffc39ce92a0 R14: 0000000000000003 R15: 0000000000010000
 </TASK>

Crashes (1118):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/30 06:50 upstream f016f7547aee fb427a07 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root WARNING in __brelse
2023/07/22 14:28 upstream d192f5382581 27cbe77f .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-selinux-root WARNING in __brelse
2025/03/13 18:53 upstream b7f94fcf5546 44be8b44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/03/11 22:42 upstream 0b46b049d6ec 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/27 02:35 upstream c2da8b3f914f 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __brelse
2025/01/17 07:50 upstream ce69b4019001 f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/17 02:47 upstream ce69b4019001 f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __brelse
2025/01/13 17:21 upstream 5bc55a333a2f 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/09 06:03 upstream 0b7958fa05d5 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/06 14:41 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/06 13:20 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/06 12:15 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/06 06:59 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/06 04:09 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/06 04:09 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/05 22:03 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __brelse
2025/01/05 11:49 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/05 10:29 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/05 09:03 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/05 06:51 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/05 05:37 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/05 03:01 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/04 20:54 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/04 20:31 upstream ab75170520d4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/04 17:00 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/04 14:29 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/04 08:54 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/04 06:40 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/04 00:32 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/04 00:32 upstream 63676eefb7a0 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/03 23:04 upstream 0bc21e701a6f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/03 21:14 upstream 0bc21e701a6f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/03 18:43 upstream 0bc21e701a6f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __brelse
2025/01/03 16:22 upstream 0bc21e701a6f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/03 13:28 upstream 0bc21e701a6f f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/03 12:13 upstream 0bc21e701a6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/03 05:00 upstream 0bc21e701a6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/03 04:54 upstream 0bc21e701a6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/03 02:17 upstream 0bc21e701a6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/03 00:27 upstream 0bc21e701a6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __brelse
2025/01/02 19:55 upstream 0bc21e701a6f d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/02 12:37 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/02 08:59 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2025/01/02 07:33 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/02 03:44 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __brelse
2025/01/02 02:48 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __brelse
2024/12/02 13:42 upstream 40384c840ea1 68914665 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-badwrites-root WARNING in __brelse
2024/12/02 12:56 upstream 40384c840ea1 68914665 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-badwrites-root WARNING in __brelse
2024/04/14 23:15 upstream fe46a7dd189e c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in __brelse
2024/12/27 05:18 upstream d6ef8b40d075 d3ccff63 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __brelse
2024/04/15 20:20 upstream 0bbac3facb5d 459f4b00 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __brelse
2024/03/25 07:47 upstream 4cece7649650 0ea90952 .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-qemu-upstream WARNING in __brelse
2024/04/15 20:14 upstream 0bbac3facb5d 459f4b00 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in __brelse
2024/12/26 07:24 linux-next 8155b4ef3466 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in __brelse
2025/02/28 08:15 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 017f704fbfb1 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/17 13:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 953d1c45 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/16 15:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/16 05:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/15 18:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 7315a7cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/13 19:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 b1f1cd88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/12 13:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/12 01:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6251d1776bc5 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/09 15:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 577490b6abb9 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/08 17:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 577490b6abb9 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/06 10:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
2025/01/06 08:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __brelse
* Struck through repros no longer work on HEAD.