WARNING in trace_check_vprintf

Status: upstream: reported on 2026/07/27 19:43
Reported-by: syzbot+ae301276c89ae21db82a@syzkaller.appspotmail.com
First crash: 84d, last: 9h40m
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in trace_check_vprintf -1 18 3d18h 67d 0/3 upstream: reported on 2026/08/13 09:23

Sample crash report:
' current_buffer: '           <...>-21599   [001] .....  1557.032895: dwc3_ctrl_req: Get Device Status(Length = 0)
           <...>-1970561396 [001] .p.35  1557.088187: Unknown type 25955
          <idle>-0       [001] .....  1557.113419: initcall_level: level='
WARNING: CPU: 0 PID: 26382 at kernel/trace/trace.c:3891 trace_check_vprintf+0xd4a/0x1080 kernel/trace/trace.c:3889
Modules linked in:
CPU: 0 PID: 26382 Comm: syz.4.6160 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:trace_check_vprintf+0xd4a/0x1080 kernel/trace/trace.c:3889
Code: e8 9b 20 fc ff c6 05 53 42 66 0d 01 48 8b 7c 24 40 e8 5a 04 00 00 48 c7 c7 00 85 90 8a 48 8b 74 24 60 48 89 c2 e8 b6 93 c7 ff <0f> 0b e9 1c fe ff ff 48 8b 4c 24 38 80 e1 07 38 c1 0f 8c ca f7 ff
RSP: 0018:ffffc90004d77a60 EFLAGS: 00010246
RAX: 870c2da63f843100 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90013ae4000 RSI: 000000000004fb11 RDI: 000000000004fb12
RBP: ffff8880786440d8 R08: ffffc90004d776e7 R09: 1ffff920009aeedc
R10: dffffc0000000000 R11: fffff520009aeedd R12: ffffffff8a800540
R13: ffffc90004d77ba0 R14: dffffc0000000000 R15: 0000000000000002
FS:  00007f546ff066c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f546ff05ff8 CR3: 0000000057a9a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 trace_event_printf+0xea/0x140 kernel/trace/trace_output.c:321
 trace_raw_output_initcall_level+0x93/0xd0 include/trace/events/initcall.h:10
 tracing_read_pipe+0x53b/0xb10 kernel/trace/trace.c:6896
 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: 0033:0x7f546ef9e559
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:00007f546ff06028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f546f226180 RCX: 00007f546ef9e559
RDX: 0000000000004000 RSI: 0000200000000600 RDI: 0000000000000008
RBP: 00007f546f035ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f546f226218 R14: 00007f546f226180 R15: 00007fff8811d9b8
 </TASK>

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/19 10:28 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/10/15 10:18 linux-6.1.y a500ba24937a 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/10/06 12:14 linux-6.1.y a500ba24937a f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/10/03 23:05 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/10/03 23:05 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/10/03 17:41 linux-6.1.y a500ba24937a 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/09/27 03:28 linux-6.1.y 1a8763b93150 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
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 trace_check_vprintf
2026/09/16 18:40 linux-6.1.y 1a8763b93150 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/08/12 02:59 linux-6.1.y e4f7d8be268e f8d35649 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/08/07 06:42 linux-6.1.y 03f3a99e8e93 c38879ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
2026/07/27 19:43 linux-6.1.y dc5c83b7f5f8 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in trace_check_vprintf
* Struck through repros no longer work on HEAD.