syzbot

 sign-in | mailing list | source | docs
🐞 Open [1542]
≡ Subsystems
🐞 Fixed [6210]
🐞 Invalid [15651]
⬇ Missing Backports [183]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

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: 2259d, last: 8h50m
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 (7)
Title Replies (including bot) Last reply
[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 (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in rcu_check_gp_start_stall (2) 7 226d 370d 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 509d 509d 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 C done 10 19d 590d 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 (2543):
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
2025/04/30 04:27 upstream 8bac8898fe39 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/04/28 11:11 upstream b4432656b36e c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in rcu_check_gp_start_stall
2025/04/04 00:39 upstream a2cc6ff5ec8f d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/27 02:17 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/03/22 17:30 upstream 88d324e69ea9 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/03/20 15:05 upstream a7f2e10ecd8f 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in rcu_check_gp_start_stall
2025/03/11 09:48 upstream 4d872d51bc9d 16256247 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root 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
2025/01/15 06:46 upstream c3812b15000c 7315a7cf .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in rcu_check_gp_start_stall
2025/02/21 23:39 upstream a3daad821514 d34966d1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in rcu_check_gp_start_stall
2025/04/26 07:47 bpf f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/25 03:45 bpf f2858f308131 e3715315 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/07 13:37 bpf 9bae8f4f2168 a2ada0e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/31 21:36 bpf 07be1f644ff9 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/31 12:47 bpf c6d8c02037c7 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/30 11:40 bpf 6ccf6adb05d0 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/29 16:04 bpf 6ccf6adb05d0 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/24 20:59 bpf 6ccf6adb05d0 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/23 08:08 bpf 6ccf6adb05d0 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/22 13:20 bpf 6ccf6adb05d0 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/21 08:19 bpf 6ccf6adb05d0 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/20 04:06 bpf 6ccf6adb05d0 3b7445cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/19 17:10 bpf 6ccf6adb05d0 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/19 14:41 bpf 6ccf6adb05d0 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/18 13:32 bpf 6ccf6adb05d0 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/15 15:14 bpf 6ccf6adb05d0 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/14 13:49 bpf 6ccf6adb05d0 e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/14 09:04 bpf 6ccf6adb05d0 e2826670 .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
2025/04/27 07:50 bpf-next 91dbac407653 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/24 22:52 bpf-next 4cc20482143c 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/24 07:50 bpf-next 60400cd2b9be 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/23 13:09 bpf-next 5cffad0a5c8f d971f7e2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/22 10:19 bpf-next 5709be4c35ba 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/17 11:47 bpf-next 8582d9ab3efd 2a6ededb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/13 02:18 bpf-next a27a97f71394 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/04/01 00:56 bpf-next 4e82c87058f4 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/30 20:42 bpf-next 9aa8fe29f624 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/29 18:43 bpf-next 9aa8fe29f624 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/29 01:27 bpf-next 9aa8fe29f624 cf25e2c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/27 14:35 bpf-next 9aa8fe29f624 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/26 23:37 bpf-next 9aa8fe29f624 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/26 12:15 bpf-next 9aa8fe29f624 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/26 09:36 bpf-next 9aa8fe29f624 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/25 12:32 bpf-next 9aa8fe29f624 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/22 22:32 bpf-next 9aa8fe29f624 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/19 08:46 bpf-next ae0a457f5d33 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/19 05:31 bpf-next ae0a457f5d33 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/19 04:27 bpf-next ae0a457f5d33 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/17 13:32 bpf-next 812f7702d83d 948c34e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/15 07:16 bpf-next 2d7597d67e3c e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-bpf-next-kasan-gce WARNING in rcu_check_gp_start_stall
2025/03/14 17:03 bpf-next 2d7597d67e3c e2826670 .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.