syzbot

 sign-in | mailing list | source | docs
🐞 Open [813]
🐞 Fixed [135]
🐞 Invalid [935]
⬇ Missing Backports [79]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

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: 977d, last: 11h23m
▶ ▼ 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 (22)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-414 INFO: rcu detected stall in corrupted 1 C 3 2337d 2410d 0/1 public: reported C repro on 2019/04/10 16:04
android-49 INFO: rcu detected stall in corrupted 1 C 27 2221d 2406d 0/3 public: reported C repro on 2019/04/14 00:00
upstream INFO: rcu detected stall in corrupted (3) kernel 1 C done 1 2425d 2421d 0/29 closed as invalid on 2019/03/30 00:13
linux-4.14 INFO: rcu detected stall in corrupted (2) 1 C error 4 1980d 2141d 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 C done 81 16h14m 144d 0/2 upstream: reported C repro on 2025/06/23 09:19
upstream INFO: rcu detected stall in corrupted (4) tipc 1 C done inconclusive 695 2d17h 1896d 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 1 19d 19d 0/1 premoderation: reported syz repro on 2025/10/26 00:18
upstream INFO: rcu detected stall in corrupted net 1 syz 1 2734d 2733d 8/29 fixed on 2018/07/09 18:05
linux-4.14 INFO: rcu detected stall in corrupted 1 C done 3 2254d 2276d 1/1 fixed on 2019/12/05 23:59
linux-4.19 INFO: rcu detected stall in corrupted 1 C error 2 1394d 2101d 0/1 upstream: reported C repro on 2020/02/13 05:06
upstream INFO: rcu detected stall in corrupted (2) kernel 1 syz 1 2665d 2665d 0/29 closed as invalid on 2018/07/29 11:55
linux-5.15 INFO: rcu detected stall in corrupted origin:lts-only 1 C error 67 4d00h 753d 0/3 upstream: reported C repro on 2023/10/23 02:41
upstream INFO: task hung in exit_aio (4) fs 1 6 336d 402d 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 C error 33 425d 582d 0/2 upstream: reported C repro on 2024/04/11 09:01
upstream BUG: workqueue lockup (5) net 1 C done 14125 2h55m 2130d 0/29 upstream: reported C repro on 2020/01/14 22:04
upstream INFO: task hung in nsim_destroy (4) net 1 syz 434 29d 532d 0/29 upstream: reported syz repro on 2024/05/31 11:16
upstream INFO: task hung in reg_process_self_managed_hints wireless 1 C done 885 1d23h 815d 0/29 upstream: reported C repro on 2023/08/21 16:36
linux-4.14 BUG: soft lockup in corrupted 1 C error 12 1201d 1685d 0/1 upstream: reported C repro on 2021/04/04 06:30
upstream INFO: task hung in reg_check_chans_work (7) wireless 1 C error 768 19h50m 417d 0/29 upstream: reported C repro on 2024/09/23 08:39
upstream INFO: task hung in linkwatch_event (4) net 1 C done 3393 9h47m 475d 0/29 upstream: reported C repro on 2024/07/27 06:21
upstream INFO: task hung in uevent_show (2) kernel 1 C inconclusive 8325 131d 370d 29/29 fixed on 2025/07/17 21:22
linux-4.19 BUG: soft lockup in corrupted 1 C error 3 1230d 1418d 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=9085, q=203 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294956596-4294946094), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g9085 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:26880 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 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: 4366 Comm: syz-executor225 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:common_interrupt_return+0x1b/0x5d arch/x86/entry/entry_64.S:617
Code: e8 fa c0 d7 ff e9 f5 02 00 00 0f 1f 44 00 00 66 90 b9 48 00 00 00 65 48 8b 14 25 68 6f 02 00 83 e2 fe 89 d0 48 c1 ea 20 0f 30 <41> 5f 41 5e 41 5d 41 5c 5d 5b 41 5b 41 5a 41 59 41 58 58 59 5a 5e
RSP: 0018:ffffc900048fff58 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000048
RDX: 0000000000000000 RSI: ffffffff8a8c0580 RDI: ffffffff8adef760
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c3ed56
R10: fffffbfff1c3ed56 R11: 00007f4e5f5c8f70 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000555594b1d3c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 000000001e343000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
RIP: 0033:0x7f4e5f5c8f70
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d ba fc 02 00 e8 55 df fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007fff66efd778 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f4e5f5a0e39
RDX: 00007fff66efd780 RSI: 00007fff66efd8b0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007f4e5f5f71fa R09: 00007f4e5f5f71fa
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4e5f5f7469
R13: 0000000000000001 R14: 00007fff66efdd60 R15: 0000000000000000
 </TASK>

Crashes (3975):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/13 21:15 linux-6.1.y f6e38ae624cf 07e030de .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/11/08 09:48 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2025/11/05 22:48 linux-6.1.y f6e38ae624cf a6c9c731 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/30 12:58 linux-6.1.y f6e38ae624cf fd2207e7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/30 12:14 linux-6.1.y f6e38ae624cf fd2207e7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/27 11:12 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2025/10/22 00:08 linux-6.1.y 8e6e2188d949 9832ed61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/05 16:37 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/04 19:44 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/28 13:40 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/28 02:26 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/27 23:26 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/27 20:22 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/27 17:18 linux-6.1.y 7b34dc04e4ff 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/17 06:56 linux-6.1.y 3db754f56897 e2beed91 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/04 01:55 linux-6.1.y f89b6e15694c 96a211bc .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/03 14:04 linux-6.1.y f89b6e15694c 96a211bc .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/02 03:33 linux-6.1.y f89b6e15694c 807a3b61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/08/22 16:39 linux-6.1.y 0bc96de781b4 bf27483f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf 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
2025/11/11 20:28 linux-6.1.y f6e38ae624cf 4e1406b4 .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
2025/11/14 05:10 linux-6.1.y f6e38ae624cf 07e030de .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/11/13 18:45 linux-6.1.y f6e38ae624cf 07e030de .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2025/11/07 23:08 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/11/07 15:03 linux-6.1.y f6e38ae624cf 4e1406b4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/11/06 04:22 linux-6.1.y f6e38ae624cf a6c9c731 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/11/06 04:14 linux-6.1.y f6e38ae624cf a6c9c731 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/28 10:45 linux-6.1.y 8e6e2188d949 fd2207e7 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2025/10/26 21:01 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/26 03:10 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/21 21:40 linux-6.1.y 8e6e2188d949 9832ed61 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/13 08:47 linux-6.1.y 882efbdd9d34 ff1712fe .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2025/10/11 21:26 linux-6.1.y 882efbdd9d34 ff1712fe .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2025/10/05 17:31 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/10/04 07:43 linux-6.1.y 882efbdd9d34 49379ee0 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/26 16:06 linux-6.1.y 7b34dc04e4ff 0abd0691 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/20 18:30 linux-6.1.y 363a599da6d9 67c37560 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/20 16:28 linux-6.1.y 363a599da6d9 67c37560 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/15 14:23 linux-6.1.y 3db754f56897 e2beed91 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/11 08:44 linux-6.1.y f97f1002271b fdeaa69b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/11 08:33 linux-6.1.y f97f1002271b fdeaa69b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/09/06 20:16 linux-6.1.y 28c695c365e1 d291dd2d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf INFO: rcu detected stall in corrupted
2025/08/18 19:53 linux-6.1.y 0bc96de781b4 1804e95e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/08/18 13:44 linux-6.1.y 0bc96de781b4 1804e95e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/08/18 08:09 linux-6.1.y 0bc96de781b4 1804e95e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in corrupted
2025/08/18 01:51 linux-6.1.y 0bc96de781b4 1804e95e .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
2025/10/26 11:58 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: rcu detected stall in corrupted
2025/10/23 14:55 linux-6.1.y 8e6e2188d949 c0460fcd .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: rcu detected stall in corrupted
2025/10/07 17:22 linux-6.1.y 882efbdd9d34 8ef35d49 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 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.