syzbot


WARNING: locking bug in find_lock_lowest_rq

Status: upstream: reported C repro on 2024/04/25 01:07
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+9a3a26ce3bf119f0190b@syzkaller.appspotmail.com
First crash: 230d, last: 2d18h
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ext4?] WARNING: locking bug in find_lock_lowest_rq 2 (3) 2024/05/29 15:50
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel paging request in find_lock_lowest_rq kernel 13 15d 128d 0/28 upstream: reported on 2024/07/31 23:30
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/09/07 00:05 23m retest repro upstream report log
2024/05/18 13:23 23m retest repro upstream report log

Sample crash report:
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!test_bit(class_idx, lock_classes_in_use))
WARNING: CPU: 0 PID: 19 at kernel/locking/lockdep.c:5172 __lock_acquire+0x15fd/0x2050 kernel/locking/lockdep.c:5172
Modules linked in:
CPU: 0 UID: 0 PID: 19 Comm: rcu_exp_gp_kthr Not tainted 6.12.0-rc6-syzkaller-00169-g906bd684e4b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:__lock_acquire+0x15fd/0x2050 kernel/locking/lockdep.c:5172
Code: 0f b6 04 08 84 c0 0f 85 d7 09 00 00 83 3d 1a d8 ac 0e 00 75 19 90 48 c7 c7 60 c9 0a 8c 48 c7 c6 40 f2 0a 8c e8 44 6c e5 ff 90 <0f> 0b 90 90 90 e9 09 fe ff ff 90 0f 0b 90 e9 5f fd ff ff 90 e8 3a
RSP: 0018:ffffc90000187670 EFLAGS: 00010046
RAX: f7108018b05bce00 RBX: 0000000028f5c368 RCX: ffff88801c2abc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88801c2ac780 R08: ffffffff8155d312 R09: 1ffff110170c519a
R10: dffffc0000000000 R11: ffffed10170c519b R12: ffff88801c2abc00
R13: ffff88801c2ac6d8 R14: 0000000000000000 R15: ffff88801c2ac7a0
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9836b02d48 CR3: 0000000075f08000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
 _double_lock_balance kernel/sched/sched.h:2984 [inline]
 double_lock_balance kernel/sched/sched.h:3029 [inline]
 find_lock_lowest_rq+0x1e1/0x670 kernel/sched/rt.c:1924
 push_rt_task+0x13f/0x7e0 kernel/sched/rt.c:2057
 push_rt_tasks kernel/sched/rt.c:2107 [inline]
 task_woken_rt+0x14c/0x220 kernel/sched/rt.c:2407
 ttwu_do_activate+0x30c/0x760 kernel/sched/core.c:3692
 ttwu_queue kernel/sched/core.c:3953 [inline]
 try_to_wake_up+0x8d6/0x14b0 kernel/sched/core.c:4281
 autoremove_wake_function+0x16/0x110 kernel/sched/wait.c:384
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock+0x132/0x1e0 kernel/sched/wait.c:106
 rcu_exp_wait_wake kernel/rcu/tree_exp.h:696 [inline]
 rcu_exp_sel_wait_wake+0x18bf/0x1dc0 kernel/rcu/tree_exp.h:712
 kthread_worker_fn+0x502/0xb70 kernel/kthread.c:844
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (63):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/08 18:03 upstream 906bd684e4b1 179b040e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/04/21 03:01 upstream 977b1ef51866 af24b050 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/12/05 03:26 upstream feffde684ac2 29f61fce .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/29 10:59 upstream 7af08b57bcb9 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/29 07:23 upstream 7af08b57bcb9 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/28 07:15 upstream aaf20f870da0 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/26 17:11 upstream 2c22dc1ee3a1 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/26 12:18 upstream 2c22dc1ee3a1 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/26 10:21 upstream 2c22dc1ee3a1 11dbc254 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/25 18:36 upstream 9f16d5e6f220 a84878fc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/24 13:14 upstream 9f16d5e6f220 68da6d95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/22 00:48 upstream fcc79e1714e8 4b25d554 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/19 21:46 upstream 158f238aa69d 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/19 13:25 upstream c6d64479d609 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/18 01:46 upstream f66d6acccbc0 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/17 13:05 upstream 4a5df3796467 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/17 12:03 upstream 4a5df3796467 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/17 02:10 upstream e8bdb3c8be08 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/16 23:17 upstream e8bdb3c8be08 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/16 16:34 upstream e8bdb3c8be08 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/16 11:14 upstream f868cd251776 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/15 15:47 upstream cfaaa7d010d1 f6ede3a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/14 20:03 upstream 0a9b9d17f3a7 77f3eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/14 13:52 upstream 0a9b9d17f3a7 77f3eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/10 17:31 upstream de2f378f2b77 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/06 19:07 upstream 2e1b3cc9d7f7 3a465482 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/04 21:31 upstream 557329bcecc2 509da429 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/11/02 08:30 upstream 11066801dd4b f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/10/30 14:11 upstream c1e939a21eb1 66aeb999 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/10/19 09:39 upstream 3d5ad2d4eca3 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/10/17 09:08 upstream c964ced77262 666f77ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/10/14 18:33 upstream 6485cf5ea253 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/10/12 18:36 upstream 09f6b0c8904b 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/10/11 22:22 upstream 1d227fcc7222 cd942402 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/10/06 02:12 upstream fc20a3e57247 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/09/26 09:57 upstream aa486552a110 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/09/24 11:05 upstream abf2050f51fd 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/09/21 17:09 upstream 1868f9d0260e 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/09/18 15:53 upstream 2f27fce67173 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/08/23 23:56 upstream 3d5f968a177d d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/08/17 05:47 upstream 670c12ce09a8 76120936 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/08/08 23:28 upstream cf6d429eb656 61405512 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/08/02 03:33 upstream c0ecd6388360 1e9c4cf3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/31 01:38 upstream 22f546873149 a4e01e1e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/17 10:55 upstream 51835949dda3 215bec2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/11 22:16 upstream 8a18fda0febb c699c2eb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/10 11:45 upstream 34afb82a3c67 e7213be3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/07 00:42 upstream 22f902dfc51e bc4ebbb5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/05 16:56 upstream 661e504db04c 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/04 15:41 upstream 795c58e4c7fc dc6bbff0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/07/02 03:42 upstream 73e931504f8e b294e901 .config console log report info [disk image] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/06/29 12:37 upstream de0a9f448633 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/06/23 09:53 upstream 5f583a3162ff edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/06/19 22:02 upstream 2ccbdf43d5e7 41b7e219 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/06/19 00:57 upstream 2ccbdf43d5e7 639d6cdf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/06/16 01:08 upstream 2ccbdf43d5e7 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/06/14 02:06 upstream 2ccbdf43d5e7 a9616ff5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/06/13 17:21 upstream 2ccbdf43d5e7 2aa5052f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/05/31 00:25 upstream 4a4be1ad3a6e 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/05/22 19:16 upstream 8f6a15f095a6 4d098039 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/05/04 12:32 upstream 3d25a941ea50 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
2024/04/21 01:02 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING: locking bug in find_lock_lowest_rq
* Struck through repros no longer work on HEAD.