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WARNING in rcu_sync_dtor (2)

Status: upstream: reported C repro on 2024/11/16 09:33
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+823cd0d24881f21ab9f1@syzkaller.appspotmail.com
First crash: 185d, last: 1d00h
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 212d 294d 3/3 fixed on 2024/11/26 10:25
upstream WARNING in rcu_sync_dtor f2fs C done 749 231d 294d 28/28 fixed on 2024/10/22 11:57
linux-6.1 WARNING in rcu_sync_dtor 1 245d 245d 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: 0 PID: 10 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177
Modules linked in:
CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.15.0-rc6-syzkaller-00085-gc94d59a126cb #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 27 c3 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 c5 75 ab 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:ffffc900000f7a88 EFLAGS: 00010246
RAX: 0000000000000002 RBX: ffff88807f6a2350 RCX: 164d0da3e71d3700
RDX: 0000000000000000 RSI: ffffffff8bc104c0 RDI: ffff88807f6a2350
RBP: 00000000000001a6 R08: ffffffff8dde112f R09: 1ffffffff1bbc225
R10: dffffc0000000000 R11: fffffbfff1bbc226 R12: dffffc0000000000
R13: 1ffff1100fed446a R14: ffff88807f6a2350 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc8965cf6c CR3: 0000000023e1e000 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:282
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (277):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/05/16 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
2025/05/14 01:59 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/14 00:38 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 23:30 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 22:17 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 21:17 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 17:29 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 15:24 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 12:57 upstream e9565e23cd89 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 11:25 upstream e9565e23cd89 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 09:02 upstream e9565e23cd89 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 06:38 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 03:57 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 02:54 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/13 01:30 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/12 21:37 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/12 19:45 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/12 18:32 upstream 627277ba7c23 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/12 17:08 upstream 82f2b0b97b36 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/12 16:03 upstream 82f2b0b97b36 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/12 10:16 upstream 82f2b0b97b36 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/12 04:31 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 23:45 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 20:55 upstream cd802e7e5f1e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 18:53 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 17:50 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 15:57 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 15:43 upstream 3ce9925823c7 77908e5f .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
2025/05/11 07:13 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/11 05:40 upstream bec6f00f120e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/10 08:08 upstream 0e1329d4045c 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/09 23:01 upstream 3013c33dcbd9 bb813bcc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in rcu_sync_dtor
2025/05/09 16:25 upstream 9c69f8884904 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/09 16:22 upstream 9c69f8884904 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/09 08:04 upstream 9c69f8884904 bb813bcc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in rcu_sync_dtor
2025/05/08 08:40 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/05/08 02:07 upstream d76bb1ebb558 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in rcu_sync_dtor
2025/05/07 07:42 upstream 0d8d44db295c 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2024/12/24 02:32 linux-next 8155b4ef3466 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in rcu_sync_dtor
2025/05/08 17:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e0f4c8dd9d2d dbf35fa1 .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.