INFO: rcu detected stall in corrupted

Status: upstream: reported C repro on 2023/03/13 04:03
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+675efd00db19530582a5@syzkaller.appspotmail.com
First crash: 1288d, last: 6h39m
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/10/26 linux-6.1.y (ToT) 7ec6f9fa3d97 C [report] INFO: rcu detected stall in batadv_nc_worker
2023/12/09 upstream (ToT) f2e8a57ee903 C [report] INFO: rcu detected stall in corrupted
2024/10/26 upstream (ToT) 850925a8133c C Didn't crash
▶ ▼ Similar bugs (25)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-414 INFO: rcu detected stall in corrupted 1 syz, C 3 2647d 2720d 0/1 public: reported C repro on 2019/04/10 16:04
android-49 INFO: rcu detected stall in corrupted 1 syz, C 27 2532d 2717d 0/3 public: reported C repro on 2019/04/14 00:00
upstream INFO: rcu detected stall in corrupted (3) kernel 1 syz, C done 1 2736d 2732d 0/29 closed as invalid on 2019/03/30 00:13
linux-4.14 INFO: rcu detected stall in corrupted (2) 1 syz, C error 4 2290d 2452d 0/1 upstream: reported C repro on 2020/01/04 08:54
linux-6.6 INFO: rcu detected stall in corrupted origin:lts-only 1 syz, C done 121 18d 455d 0/2 upstream: reported C repro on 2025/06/23 09:19
upstream INFO: rcu detected stall in corrupted (4) prio:low wireless 1 syz, C done inconclusive 854 55m 2207d 0/29 upstream: reported C repro on 2020/09/04 18:49
android-6-12 INFO: rcu detected stall in corrupted origin:lts 1 syz 2 210d 330d 0/1 auto-obsoleted due to no activity on 2026/05/24 04:58
upstream INFO: rcu detected stall in corrupted net 1 syz 1 3045d 3044d 8/29 fixed on 2018/07/09 18:05
linux-4.14 INFO: rcu detected stall in corrupted 1 syz, C done 3 2565d 2587d 1/1 fixed on 2019/12/05 23:59
linux-4.19 INFO: rcu detected stall in corrupted 1 syz, C error 2 1704d 2412d 0/1 upstream: reported C repro on 2020/02/13 05:06
upstream INFO: rcu detected stall in corrupted (2) kernel 1 syz 1 2976d 2976d 0/29 closed as invalid on 2018/07/29 11:55
linux-5.15 INFO: rcu detected stall in corrupted origin:lts-only 1 syz, C error 177 1h51m 1064d 0/3 upstream: reported C repro on 2023/10/23 02:41
upstream INFO: task hung in inet_rtm_newaddr prio:normal net 1 syz, C done 229 1h42m 634d 13/29 upstream: reported C repro on 2024/12/26 09:45
upstream INFO: task hung in exit_aio (4) fs 1 6 647d 713d 0/29 auto-obsoleted due to no activity on 2025/03/13 05:51
android-5-15 BUG: soft lockup in corrupted origin:upstream 1 syz, C error 33 736d 893d 0/2 upstream: reported C repro on 2024/04/11 09:01
upstream BUG: workqueue lockup (5) prio:low kernel 1 syz, C done 17808 10h54m 2441d 0/29 upstream: reported C repro on 2020/01/14 22:04
upstream INFO: task hung in nsim_destroy (4) prio:high net 1 syz, C error error 495 4h55m 842d 0/29 upstream: reported C repro on 2024/05/31 11:16
upstream INFO: task hung in hub_port_init (3) prio:low usb 1 syz, C error 1174 6h35m 1272d 0/29 upstream: reported C repro on 2023/03/28 12:23
upstream INFO: task hung in reg_process_self_managed_hints prio:high wireless 1 syz, C done 1542 9h35m 1126d 0/29 upstream: reported C repro on 2023/08/21 16:36
linux-4.14 BUG: soft lockup in corrupted 1 syz, C error 12 1512d 1996d 0/1 upstream: reported C repro on 2021/04/04 06:30
upstream INFO: task hung in reg_check_chans_work (7) prio:normal wireless 1 syz, C error 1866 1h15m 728d 0/29 upstream: reported C repro on 2024/09/23 08:39
upstream INFO: task hung in linkwatch_event (4) prio:low net 1 syz, C done 4675 6m 786d 0/29 upstream: reported C repro on 2024/07/27 06:21
upstream INFO: task hung in uevent_show (2) kernel 1 syz, C inconclusive 8325 442d 680d 29/29 fixed on 2025/07/17 21:22
upstream INFO: task hung in read_part_sector (2) prio:low block 1 syz error error 78401 16m 777d 0/29 upstream: reported syz repro on 2024/08/04 19:22
linux-4.19 BUG: soft lockup in corrupted 1 syz, C error 3 1541d 1729d 0/1 upstream: reported C repro on 2021/12/26 20:46
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/05/14 00:00 1h54m fix candidate upstream OK (0) job log

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=7937, q=122 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294955896-4294945394), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g7937 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27920 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5246 [inline]
 __schedule+0x107f/0x4030 kernel/sched/core.c:6563
 schedule+0xb9/0x180 kernel/sched/core.c:6639
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1350 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4315 Comm: syz-executor252 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:check_preemption_disabled+0x47/0x110 lib/smp_processor_id.c:55
Code: cf 75 65 8b 0d 12 d2 cf 75 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 5b <41> 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00
RSP: 0018:ffffc900040f7e20 EFLAGS: 00000086
RAX: 0000000000000001 RBX: ffff88802de73c00 RCX: 29bae312d9e38600
RDX: dffffc0000000000 RSI: ffffffff8a8c2a20 RDI: ffffffff8adf68a0
RBP: ffffc900040f7ef0 R08: ffffffff8e20b46f R09: 1ffffffff1c4168d
R10: dffffc0000000000 R11: fffffbfff1c4168e R12: 0000000000000000
R13: 0000000000000000 R14: 1ffff11005bce8db R15: ffff88802de746c0
FS:  00005555676963c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 000000007c564000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lockdep_hardirqs_on_prepare+0x448/0x7c0 kernel/locking/lockdep.c:4321
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 syscall_enter_from_user_mode+0x21/0x80 kernel/entry/common.c:120
 do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:72
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f28e565bab7
Code: 93 07 00 ba 55 00 00 00 48 8d 35 d7 5d 07 00 48 8d 3d e7 5d 07 00 e8 18 65 fe ff e8 53 32 00 00 0f 1f 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 66 2e 0f 1f 84
RSP: 002b:00007fffd566d348 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007fffd566d4b0 RCX: 00007f28e565bab7
RDX: 00007fffd566d380 RSI: 00007fffd566d4b0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007f28e5633990 R09: 00007f28e5633990
R10: 0000000000000000 R11: 0000000000000206 R12: 00007f28e56d118d
R13: 0000000000000003 R14: 00007fffd566d940 R15: 0000000000000000
 </TASK>

Crashes (4059):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/21 04:32 linux-6.1.y 1a8763b93150 853b104b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/09/11 02:28 linux-6.1.y cf82dcca9634 1fe56c0a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/08/30 19:41 linux-6.1.y d64a499eea6b 2f52988a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/08/05 16:47 linux-6.1.y fb28aa725e05 52aa2820 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/08/03 04:26 linux-6.1.y fb28aa725e05 e611ffe1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/07/26 14:53 linux-6.1.y dc5c83b7f5f8 492bab15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/07/25 19:18 linux-6.1.y dc5c83b7f5f8 492bab15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/07/19 21:58 linux-6.1.y 090666d3cc90 72524a66 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/07/19 02:02 linux-6.1.y 090666d3cc90 72524a66 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/07/19 01:54 linux-6.1.y 090666d3cc90 72524a66 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/07/18 22:26 linux-6.1.y 090666d3cc90 72524a66 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/29 10:38 linux-6.1.y fdb6fcb41cc7 fb92f11c .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/06/29 01:46 linux-6.1.y fdb6fcb41cc7 fb92f11c .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/22 05:04 linux-6.1.y fdb6fcb41cc7 43bfcdb0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/21 00:44 linux-6.1.y fdb6fcb41cc7 43bfcdb0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/06/20 16:08 linux-6.1.y fdb6fcb41cc7 43bfcdb0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/19 01:12 linux-6.1.y 228da13e907e a776b0d0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/06/15 07:43 linux-6.1.y 228da13e907e 1d2f3589 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/15 03:05 linux-6.1.y 228da13e907e 1d2f3589 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/15 00:14 linux-6.1.y 228da13e907e 1d2f3589 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/14 21:22 linux-6.1.y 228da13e907e 1d2f3589 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/14 18:31 linux-6.1.y 228da13e907e 1d2f3589 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/06/09 04:15 linux-6.1.y 228da13e907e 656e94c6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/05/30 13:51 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/04/26 12:51 linux-6.1.y 7c87defbd336 9c2d0995 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/04/03 12:56 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/03/29 23:34 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/03/29 19:43 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/03/29 11:48 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/03/29 09:30 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/03/28 23:45 linux-6.1.y 1989cd3d56e2 b5ceaad2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/03/08 15:04 linux-6.1.y f2ddafa93a25 5cb44a80 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/02/23 05:11 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/22 11:47 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/21 19:06 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/14 22:53 linux-6.1.y 8ce36b2849ef 1e62d198 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/14 22:22 linux-6.1.y 8ce36b2849ef 1e62d198 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/08 13:39 linux-6.1.y 0182cb5b74ee 4c131dc4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/08 12:05 linux-6.1.y 0182cb5b74ee 4c131dc4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2023/12/09 00:13 linux-6.1.y 6c6a6c7e211c 28b24332 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/01/10 13:21 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: rcu detected stall in corrupted
2023/08/27 05:06 linux-6.1.y cd363bb9548e 7ba13a15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2023/08/01 08:17 linux-6.1.y d2a6dc4eaf6d 2a0d0f29 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/09/02 23:21 linux-6.1.y cf82dcca9634 85995287 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/08/11 03:40 linux-6.1.y e4f7d8be268e 508909ea .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/08/01 18:36 linux-6.1.y fb28aa725e05 e611ffe1 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/07/19 18:14 linux-6.1.y 090666d3cc90 72524a66 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/07/06 02:58 linux-6.1.y 090666d3cc90 fcece630 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/05/24 07:38 linux-6.1.y dcbcab9d7079 c69befb3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/05/14 16:55 linux-6.1.y ad16b162f21d 6ccb967e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/05/02 17:10 linux-6.1.y 4931e0e1673d a0d91488 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2026/04/22 06:56 linux-6.1.y 7c87defbd336 0b6ab7ec .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/04/13 10:02 linux-6.1.y 8e8fc038cad5 38c8e246 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/22 22:28 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2026/02/21 14:02 linux-6.1.y 779f9571ac3e 6e7b5511 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2023/05/19 01:12 linux-6.1.y fa74641fb6b9 3bb7af1d .config console log report syz [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2023/03/13 04:02 linux-6.1.y 1cc3fcf63192 5205ef30 .config console log report syz [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
* Struck through repros no longer work on HEAD.