WARNING in ring_buffer_peek

Status: upstream: reported C repro on 2026/07/27 19:36
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+c560c412639853d85b5d@syzkaller.appspotmail.com
First crash: 61d, last: 1d16h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/09/02 linux-6.1.y (ToT) cf82dcca9634 C [report] general protection fault in select_task_rq_fair
2026/09/02 upstream (ToT) 89a312991dc6 C Didn't crash
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in ring_buffer_peek -1 35 2d11h 58d 0/3 upstream: reported on 2026/07/31 15:20

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4620 at kernel/trace/ring_buffer.c:4571 arch_atomic_inc include/linux/instrumented.h:102 [inline]
WARNING: CPU: 1 PID: 4620 at kernel/trace/ring_buffer.c:4571 atomic_inc include/linux/atomic/atomic-instrumented.h:191 [inline]
WARNING: CPU: 1 PID: 4620 at kernel/trace/ring_buffer.c:4571 rb_get_reader_page+0xabf/0xcd0 kernel/trace/ring_buffer.c:4570
Modules linked in:
CPU: 1 PID: 4620 Comm: syz.2.147 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:rb_get_reader_page+0xabf/0xcd0 kernel/trace/ring_buffer.c:4570
Code: 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 e7 e8 38 41 4e 00 4d 8b 3c 24 49 8d 7f 08 be 04 00 00 00 e8 c6 42 4e 00 f0 41 ff 47 08 <0f> 0b 49 bf 00 00 00 00 00 fc ff df 4c 8b 6c 24 30 48 83 7c 24 18
RSP: 0000:ffffc900043477e0 EFLAGS: 00010002
RAX: 1ffff11002e8f101 RBX: 1ffff11002e8e876 RCX: ffffffff81852a1a
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888017470408
RBP: ffffc90004347970 R08: ffff88801747040b R09: 1ffff11002e8e081
R10: dffffc0000000000 R11: ffffed1002e8e082 R12: ffff888017478810
R13: 0000000000000854 R14: 1ffff11002e8e873 R15: ffff888017470400
FS:  0000555573da6500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c8b55da08 CR3: 000000007c483000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rb_buffer_peek+0x5e/0x940 kernel/trace/ring_buffer.c:4784
 ring_buffer_peek+0x1f8/0x440 kernel/trace/ring_buffer.c:4986
 peek_next_entry+0x113/0x1c0 kernel/trace/trace.c:3596
 __find_next_entry+0x547/0x6c0 kernel/trace/trace.c:3628
 trace_find_next_entry_inc kernel/trace/trace.c:4021 [inline]
 tracing_read_pipe+0x3bd/0xb10 kernel/trace/trace.c:6882
 vfs_read+0x2db/0x960 fs/read_write.c:468
 ksys_read+0x14d/0x260 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1f4ed9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd5081768 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f1f4f025fa0 RCX: 00007f1f4ed9e0d9
RDX: 0000000000002020 RSI: 0000200000000bc0 RDI: 0000000000000004
RBP: 00007f1f4ee35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f4f025fac R14: 00007f1f4f025fa0 R15: 00007f1f4f025fa0
 </TASK>

Crashes (27):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/27 09:14 linux-6.1.y 05208478041c a2b77b9e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/26 01:48 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/26 01:48 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/25 06:20 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/25 06:20 linux-6.1.y 1a8763b93150 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/24 08:06 linux-6.1.y 1a8763b93150 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/22 09:50 linux-6.1.y 1a8763b93150 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/20 01:17 linux-6.1.y 1a8763b93150 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/03 05:27 linux-6.1.y cf82dcca9634 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/09/03 05:26 linux-6.1.y cf82dcca9634 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/27 12:00 linux-6.1.y 05208478041c 69a01293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/25 06:09 linux-6.1.y 05208478041c 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/25 06:06 linux-6.1.y 05208478041c 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/25 04:58 linux-6.1.y 05208478041c 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/24 12:35 linux-6.1.y 05208478041c b55bd4c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/23 15:42 linux-6.1.y 05208478041c 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/21 21:00 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/19 21:06 linux-6.1.y 7e6e67054721 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/12 03:17 linux-6.1.y e4f7d8be268e f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/07 11:47 linux-6.1.y e4f7d8be268e e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/07 11:46 linux-6.1.y e4f7d8be268e e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/04 14:50 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/04 14:46 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/04 14:46 linux-6.1.y fb28aa725e05 d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/04 08:28 linux-6.1.y fb28aa725e05 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/08/03 17:20 linux-6.1.y fb28aa725e05 6b7c9f71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
2026/07/27 19:36 linux-6.1.y dc5c83b7f5f8 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ring_buffer_peek
* Struck through repros no longer work on HEAD.