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WARNING in rcu_check_gp_start_stall

Status: upstream: reported C repro on 2019/02/22 17:10
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+111bc509cd9740d7e4aa@syzkaller.appspotmail.com
First crash: 2336d, last: 1h09m
Cause bisection: introduced by (bisect log) :
commit f1e3e92135202ff3d95195393ee62808c109208c
Author: Malcolm Priestley <tvboxspy@gmail.com>
Date: Wed Jul 22 18:16:42 2015 +0000

  staging: vt6655: fix tagSRxDesc -> next_desc type

Crash: INFO: rcu detected stall in corrupted (log)
Repro: C syz .config
  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Discussions (9)
Title Replies (including bot) Last reply
[syzbot] Monthly net report (Jul 2025) 0 (1) 2025/07/14 07:23
[syzbot] Monthly net report (Jun 2025) 0 (1) 2025/06/13 12:25
[syzbot] Monthly net report (Nov 2024) 0 (1) 2024/11/04 08:49
[syzbot] Monthly net report (Oct 2024) 0 (1) 2024/10/03 09:02
[syzbot] Monthly net report (Sep 2024) 0 (1) 2024/09/02 08:21
[syzbot] Monthly net report (Aug 2024) 0 (1) 2024/08/02 07:26
[syzbot] Monthly net report (Jul 2024) 0 (1) 2024/07/01 10:28
[syzbot] Monthly mm report (May 2023) 0 (1) 2023/05/03 07:26
WARNING in rcu_check_gp_start_stall 7 (9) 2019/03/18 12:18
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in rcu_check_gp_start_stall (3) -1 1 13d 13d 0/3 upstream: reported on 2025/07/02 22:12
linux-6.6 WARNING in rcu_check_gp_start_stall -1 18 4d16h 29d 0/2 upstream: reported on 2025/06/17 13:49
linux-5.15 WARNING in rcu_check_gp_start_stall (2) -1 7 303d 447d 0/3 auto-obsoleted due to no activity on 2024/12/25 11:45
linux-5.15 WARNING in rcu_check_gp_start_stall -1 1 586d 586d 0/3 auto-obsoleted due to no activity on 2024/03/17 09:39
linux-6.1 WARNING in rcu_check_gp_start_stall origin:upstream missing-backport -1 C done 14 34d 667d 0/3 upstream: reported C repro on 2023/09/17 20:24
▶ ▼ Last patch testing requests (9)
Created Duration User Patch Repo Result
2023/09/30 19:31 23m retest repro net-next OK log
2023/09/14 06:13 15m retest repro net-next report log
2023/08/25 17:45 15m retest repro upstream report log
2023/08/25 17:45 17m retest repro upstream report log
2023/08/25 17:45 15m retest repro upstream report log
2023/04/13 13:11 15m retest repro upstream report log
2023/03/30 03:32 18m retest repro upstream report log
2022/12/20 01:31 18m retest repro upstream report log
2022/12/20 00:31 16m retest repro upstream report log
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2020/05/17 02:11 0m bisect fix upstream error job log
2020/04/16 22:09 21m bisect fix upstream OK (0) job log log
2020/03/17 16:07 23m bisect fix upstream OK (0) job log log
2020/02/16 08:59 23m bisect fix upstream OK (0) job log log
2019/12/16 21:03 22m bisect fix upstream OK (0) job log log

Sample crash report:
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
------------[ cut here ]------------
WARNING: CPU: 1 PID: 24 at kernel/rcu/tree_stall.h:1010 rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:1010
Modules linked in:
CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-rc2-syzkaller-00320-gba01565ced22 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:1010
Code: c7 c0 1a 41 9a be 04 00 00 00 e8 8c 13 83 00 b8 01 00 00 00 87 05 d1 93 c5 18 85 c0 0f 85 1a ff ff ff 48 c7 c0 00 cc 93 8e 90 <0f> 0b 90 49 39 c7 74 47 48 c7 c0 bc 25 1d 90 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc900001e7a18 EFLAGS: 00010046
RAX: ffffffff8e93cc00 RBX: 00000000ffffee26 RCX: ffffffff817b86e4
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9a411ac0
RBP: ffffc900001e7c70 R08: 0000000000000003 R09: fffffbfff3482358
R10: dffffc0000000000 R11: fffffbfff3482358 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8e93cc00
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7e6a9f7f18 CR3: 0000000027932000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_core+0x650/0x17a0 kernel/rcu/tree.c:2818
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 run_ksoftirqd+0xca/0x130 kernel/softirq.c:927
 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (2616):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/14 06:28 upstream ba01565ced22 084d8178 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in rcu_check_gp_start_stall
2024/03/31 09:12 upstream fe46a7dd189e 6baf5069 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in rcu_check_gp_start_stall
2023/06/02 12:09 upstream 1874a42a7d74 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2024/11/26 16:34 net 5d066766c5f1 11dbc254 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in rcu_check_gp_start_stall
2024/10/15 02:49 net 0b84db5d8f25 b01b6661 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in rcu_check_gp_start_stall
2024/04/30 22:13 net ba1cb99b559e 9e0e6af1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in rcu_check_gp_start_stall
2024/04/12 02:19 net f99c5f563c17 478efa7f .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in rcu_check_gp_start_stall
2024/02/04 06:52 net b09b58e31b0f a67b2c42 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in rcu_check_gp_start_stall
2025/01/13 00:32 net-next 7d0da8f86234 6dbc6a9b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in rcu_check_gp_start_stall
2024/12/05 20:56 net-next da4fa00abe56 6e50d07b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in rcu_check_gp_start_stall
2023/08/30 09:13 net-next bd6c11bc43c4 b42ca3a7 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in rcu_check_gp_start_stall
2019/02/22 16:31 upstream 8a61716ff2ab 6a5fcca4 .config console log report syz C ci-upstream-kasan-gce-smack-root
2019/02/22 08:04 upstream 8a61716ff2ab 7ff74a98 .config console log report syz C ci-upstream-kasan-gce-root
2024/05/28 02:49 upstream 2bfcfd584ff5 f550015e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2023/09/16 19:19 net-next c123e0d30bdb 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/12 18:04 upstream 379f604cc3dc 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in rcu_check_gp_start_stall
2025/07/12 14:35 upstream 379f604cc3dc 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in rcu_check_gp_start_stall
2025/07/03 20:29 upstream 17bbde2e1716 115ceea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/07/01 06:33 upstream 66701750d556 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/06/26 21:25 upstream e34a79b96ab9 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/06/22 22:00 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/06/02 16:51 upstream cd2e103d57e5 b396b4bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in rcu_check_gp_start_stall
2025/05/31 04:38 upstream 0f70f5b08a47 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in rcu_check_gp_start_stall
2025/05/13 13:39 upstream e9565e23cd89 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/03 03:25 upstream 7eb172143d55 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in rcu_check_gp_start_stall
2025/02/22 20:56 upstream ff202c5028a1 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in rcu_check_gp_start_stall
2024/12/09 18:07 upstream fac04efc5c79 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in rcu_check_gp_start_stall
2024/12/25 16:16 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in rcu_check_gp_start_stall
2025/06/10 19:52 upstream f09079bd04a9 5d7e17ca .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in rcu_check_gp_start_stall
2025/07/13 00:29 upstream 3f31a806a62e 3cda49cf .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in rcu_check_gp_start_stall
2025/06/27 03:56 upstream f02769e7f272 803ce19b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in rcu_check_gp_start_stall
2025/07/16 15:32 bpf bf4807c89d8f c118d736 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/10 09:43 bpf bf4807c89d8f 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/08 19:10 bpf bf4807c89d8f abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/07 01:40 bpf bf4807c89d8f 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/06 23:12 bpf bf4807c89d8f 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/05 16:25 bpf bf4807c89d8f 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/27 01:01 bpf e34a79b96ab9 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/16 01:36 bpf ad9ef7f687ce 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/12 01:26 bpf 9cf1e25053c2 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/08 02:14 bpf 02670deede22 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/06 14:11 bpf 7fdaba912981 f61267d4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/02 09:55 bpf 5b3beac3c379 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/05/30 13:26 bpf 90b83efa6701 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/01/18 12:14 net 70d81f25cc92 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/16 09:21 bpf-next e860a98c8aeb c118d736 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/15 21:25 bpf-next ea2aecdf7a95 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/14 17:01 bpf-next ea2aecdf7a95 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/14 14:19 bpf-next ea2aecdf7a95 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/10 23:27 bpf-next ad97cb2ed06a 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/07 22:14 bpf-next 6e5cae9ddae7 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/07 19:23 bpf-next 6e5cae9ddae7 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/02 11:15 bpf-next 212ec9229567 ffe4b334 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/07/02 02:02 bpf-next cce3fee729ee ffe4b334 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/24 12:31 bpf-next 3ce7cdde66e6 e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/23 09:03 bpf-next 99fe8af069a9 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/20 05:32 bpf-next e30329b8a647 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/18 13:29 bpf-next bd07bd12f2c1 ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/18 00:13 bpf-next a633dab4b4d2 417d98fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/16 17:16 bpf-next f66b4aaff254 d1716036 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/15 06:07 bpf-next f66b4aaff254 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/14 23:38 bpf-next f66b4aaff254 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/14 17:39 bpf-next f66b4aaff254 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/13 14:03 bpf-next fa6932577c07 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/12 00:25 bpf-next 3b55a9e6738b 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/10 03:52 bpf-next 4d2815a1cc3d 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/06 22:11 bpf-next 64a064ce33b1 f61267d4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/05 23:53 bpf-next 7fdaba912981 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/05 04:33 bpf-next cd2e103d57e5 6b6b5f21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/06/03 09:23 bpf-next cd2e103d57e5 b396b4bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/05/31 22:33 bpf-next 90b83efa6701 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/05/30 14:59 bpf-next 90b83efa6701 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/05/30 10:35 bpf-next 90b83efa6701 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/01/22 12:59 net-next b1754a69e7be da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in rcu_check_gp_start_stall
2024/11/27 04:56 linux-next 6f3d2b5299b0 52b38cc1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in rcu_check_gp_start_stall
2024/04/26 06:01 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing a160e1202ca3 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in rcu_check_gp_start_stall
2020/12/29 06:01 upstream dea8dcf2a9fa 8259d56c .config console log report info ci-qemu-upstream-386
* Struck through repros no longer work on HEAD.