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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: 135d, last: 2d01h
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 162d 244d 3/3 fixed on 2024/11/26 10:25
upstream WARNING in rcu_sync_dtor f2fs C done 749 181d 244d 28/28 fixed on 2024/10/22 11:57
linux-6.1 WARNING in rcu_sync_dtor 1 195d 195d 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: 5827 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177
Modules linked in:
CPU: 0 UID: 0 PID: 5827 Comm: kworker/0:3 Not tainted 6.14.0-rc6-syzkaller-00003-g4d872d51bc9d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events destroy_super_work
RIP: 0010:rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177
Code: 74 19 e8 76 ca 00 00 43 0f b6 44 25 00 84 c0 0f 85 82 00 00 00 41 83 3f 00 75 1d 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 <0f> 0b 90 e9 66 ff ff ff 90 0f 0b 90 eb 89 90 0f 0b 90 eb dd 44 89
RSP: 0018:ffffc900041afa90 EFLAGS: 00010246
RAX: 0000000000000002 RBX: 1ffff11006ab8077 RCX: ffff88802eb48000
RDX: 0000000000000000 RSI: ffffffff8c802c00 RDI: ffff8880355c0350
RBP: 00000000000001db R08: ffffffff82391404 R09: 1ffffffff1d3c0ad
R10: dffffc0000000000 R11: fffffbfff1d3c0ae R12: dffffc0000000000
R13: 1ffff11006ab806a R14: ffff8880355c0350 R15: ffff8880355c0350
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b394151000 CR3: 000000003346c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 percpu_free_rwsem+0x41/0x80 kernel/locking/percpu-rwsem.c:42
 destroy_super_work+0xef/0x130 fs/super.c:282
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd30 kernel/workqueue.c:3400
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (59):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/03/26 04:59 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/05 19:18 upstream bb2281fb05e5 60f5d8d9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/02 20:02 upstream b91872c56940 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/02 11:10 upstream ece144f151ac c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/02 02:45 upstream 03d38806a902 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/01 17:36 upstream 03d38806a902 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/03/01 13:39 upstream 7a5668899f54 67cf5345 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/28 15:15 upstream 76544811c850 67cf5345 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/28 10:28 upstream 1e15510b71c9 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/27 21:19 upstream dd83757f6e68 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/27 12:44 upstream dd83757f6e68 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/27 06:34 upstream 5394eea10651 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/26 20:59 upstream ac9c34d1e45a 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/26 16:36 upstream ac9c34d1e45a d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/26 08:04 upstream ac9c34d1e45a d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/26 08:04 upstream ac9c34d1e45a d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/25 14:24 upstream d082ecbc71e9 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/23 11:43 upstream 27102b38b8ca d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/22 20:41 upstream ff202c5028a1 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/22 14:39 upstream ff202c5028a1 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/22 05:40 upstream 8a61cb6e150e d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/22 04:38 upstream 8a61cb6e150e d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/22 02:25 upstream 8a61cb6e150e d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/22 00:30 upstream 8a61cb6e150e d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/21 09:17 upstream 334426094588 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/21 06:03 upstream e9a8cac0bf89 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/21 02:00 upstream e9a8cac0bf89 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/20 23:38 upstream e9a8cac0bf89 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/20 19:30 upstream e9a8cac0bf89 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/20 04:13 upstream 87a132e73910 50668798 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/19 08:13 upstream 6537cfb395f3 9a14138f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/19 06:06 upstream 6537cfb395f3 9a14138f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/18 23:11 upstream 6537cfb395f3 9a14138f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/18 19:25 upstream 6537cfb395f3 c37c7249 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/18 10:00 upstream 2408a807bfc3 c37c7249 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/18 10:00 upstream 2408a807bfc3 c37c7249 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/17 22:21 upstream 2408a807bfc3 429ea007 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/17 22:20 upstream 2408a807bfc3 429ea007 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/17 10:02 upstream 0ad2507d5d93 4121cf9d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/16 12:38 upstream ad1b832bf1cf 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/16 11:37 upstream ad1b832bf1cf 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/16 09:36 upstream ad1b832bf1cf 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/15 20:01 upstream 496659003dac 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/15 15:01 upstream 78a632a2086c 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/15 14:20 upstream 7ff71e6d9239 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in rcu_sync_dtor
2025/02/15 12:37 upstream 78a632a2086c 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2025/02/15 12:37 upstream 78a632a2086c 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2024/12/08 18:17 upstream 7503345ac5f5 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in rcu_sync_dtor
2024/11/12 09:32 upstream 2d5404caa8c7 75bb1b32 .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
2025/03/24 17:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a2392f333575 875573af .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.