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WARNING in rcu_sync_dtor (2)

Status: upstream: reported C repro on 2024/11/16 09:33
Subsystems: exfat
[Documentation on labels]
Reported-by: syzbot+823cd0d24881f21ab9f1@syzkaller.appspotmail.com
First crash: 226d, last: 4h41m
Cause bisection: introduced by (bisect log) :
commit f761fcdd289d07e8547fef7ac76c3760fc7803f2
Author: Dongliang Cui <dongliang.cui@unisoc.com>
Date: Tue Sep 17 22:40:05 2024 +0000

  exfat: Implement sops->shutdown and ioctl

Crash: WARNING in rcu_sync_dtor (log)
Repro: C syz .config
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [fs?] WARNING in rcu_sync_dtor (2) 2 (5) 2024/11/17 00:46
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in rcu_sync_dtor origin:upstream C done 157 252d 334d 3/3 fixed on 2024/11/26 10:25
upstream WARNING in rcu_sync_dtor f2fs C done 749 271d 335d 28/29 fixed on 2024/10/22 11:57
linux-6.1 WARNING in rcu_sync_dtor 1 286d 286d 0/3 auto-obsoleted due to no activity on 2024/12/22 13:56
▶ ▼ Last patch testing requests (5)
Created Duration User Patch Repo Result
2025/02/12 06:25 13m retest repro upstream report log
2024/11/26 20:36 1h03m retest repro upstream report log
2024/11/26 20:36 15m retest repro upstream report log
2024/11/17 00:26 13m hdanton@sina.com patch upstream report log
2024/11/16 23:09 15m hdanton@sina.com patch upstream report log
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/01/29 03:26 2h03m bisect fix upstream OK (0) job log log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 24 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177
Modules linked in:
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events destroy_super_work
RIP: 0010:rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177
Code: 18 e8 b7 c4 00 00 43 0f b6 44 25 00 84 c0 0f 85 82 00 00 00 83 3b 00 75 1f 5b 41 5c 41 5d 41 5e 41 5f 5d e9 d5 e7 bb 09 cc 90 <0f> 0b 90 e9 66 ff ff ff 90 0f 0b 90 eb 8a 90 0f 0b 90 eb db 89 d9
RSP: 0018:ffffc900001e79e8 EFLAGS: 00010246
RAX: 0000000000000002 RBX: ffff88807fa2c358 RCX: 41bb0e4b4c15a900
RDX: 0000000000000000 RSI: ffffffff8be1b9a0 RDI: ffff88807fa2c358
RBP: 000000000000019f R08: ffffffff8dfe15ef R09: 1ffffffff1bfc2bd
R10: dffffc0000000000 R11: fffffbfff1bfc2be R12: dffffc0000000000
R13: 1ffff1100ff4586b R14: ffff88807fa2c358 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125d83000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000080 CR3: 0000000076658000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 percpu_free_rwsem+0x40/0x80 kernel/locking/percpu-rwsem.c:42
 destroy_super_work+0xee/0x130 fs/super.c:283
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (322):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/26 02:00 upstream 92ca6c498a5e 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/19 07:54 upstream a5806cd506af f41472b0 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/15 06:38 upstream c94d59a126cb d6b2ee52 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 16:44 upstream 3ce9925823c7 77908e5f .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/01 02:31 upstream 7a13c14ee59d ce7952f4 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/11 06:37 upstream 4d872d51bc9d 16256247 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/19 23:36 upstream 6537cfb395f3 b257a9b7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2024/11/12 17:55 upstream 2d5404caa8c7 75bb1b32 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-upstream-fs WARNING in rcu_sync_dtor
2024/11/12 14:05 upstream 2d5404caa8c7 75bb1b32 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/11 05:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0a6021b3fc20 16256247 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
2025/05/12 23:23 upstream 627277ba7c23 f6671af7 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/26 13:57 upstream ee88bddf7f2f 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/26 06:47 upstream 92ca6c498a5e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/25 19:23 upstream 92ca6c498a5e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/23 19:25 upstream 86731a2a651e d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/22 15:22 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/22 02:16 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/21 04:42 upstream 11313e2f7812 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/21 02:21 upstream 11313e2f7812 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/20 12:54 upstream 41687a5c6f8b 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/19 03:58 upstream fb4d33ab452e ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/18 12:15 upstream 52da431bf03b ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/17 17:20 upstream 9afe652958c3 cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/16 13:53 upstream e04c78d86a96 d1716036 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/16 02:24 upstream 08215f5486ec 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/15 11:18 upstream 8c6bc74c7f89 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/13 23:52 upstream 02adc1490e6d 0e8da31f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/12 22:45 upstream 2c4a1f3fe03e 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/12 10:51 upstream 2c4a1f3fe03e 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/10 11:58 upstream f09079bd04a9 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/10 03:39 upstream 19272b37aa4f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/06/08 12:41 upstream 8630c59e9936 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/31 21:09 upstream 0f70f5b08a47 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/24 14:52 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/18 02:38 upstream 5723cc3450bc f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/18 00:45 upstream 5723cc3450bc f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/16 05:47 upstream fee3e843b309 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/15 21:20 upstream 088d13246a46 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/15 20:13 upstream 088d13246a46 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/15 15:59 upstream 088d13246a46 cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/15 09:20 upstream c94d59a126cb d6b2ee52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/15 03:22 upstream c94d59a126cb d6b2ee52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/14 18:05 upstream 1a80a098c606 a4fa04ef .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/14 07:26 upstream 9f35e33144ae 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 09:18 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in rcu_sync_dtor
2025/06/23 09:07 linux-next f817b6dd2b62 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in rcu_sync_dtor
2025/06/18 13:32 linux-next 6e5ab6fee68d ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in rcu_sync_dtor
2025/06/14 17:49 linux-next bc6e0ba6c9ba 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in rcu_sync_dtor
2025/06/13 01:49 linux-next 0bb71d301869 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in rcu_sync_dtor
2025/06/13 01:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 19272b37aa4f 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
2025/06/11 01:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d7fa1af5b33e 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
2025/06/08 21:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d7fa1af5b33e 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
2025/06/06 06:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d7fa1af5b33e 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
2025/06/05 03:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d7fa1af5b33e fd5e6e61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
2025/06/03 03:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d7fa1af5b33e b396b4bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
2025/05/25 08:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d7fa1af5b33e ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in rcu_sync_dtor
* Struck through repros no longer work on HEAD.