syzbot
WARNING in trace_check_vprintf
Status:
upstream: reported on 2026/07/27 19:43
Reported-by: syzbot+ae301276c89ae21db82a@syzkaller.appspotmail.com
First crash: 51d, last: 1d00h
Sample crash report:
------------[ cut here ]------------
fmt: 'level=%s
' current_buffer: ' <...>-7529 [001] ..... 410.614188: dwc3_ctrl_req: Get Device Status(Length = 0)
<...>-1970561396 [001] .p.35 410.669480: Unknown type 25955
<idle>-0 [001] ..... 410.694712: initcall_level: level='
WARNING: CPU: 0 PID: 7946 at kernel/trace/trace.c:3891 trace_check_vprintf+0xd4a/0x1080 kernel/trace/trace.c:3889
Modules linked in:
CPU: 0 PID: 7946 Comm: syz.1.1095 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026
RIP: 0010:trace_check_vprintf+0xd4a/0x1080 kernel/trace/trace.c:3889
Code: e8 bb 20 fc ff c6 05 47 38 86 0c 01 48 8b 7c 24 40 e8 5a 04 00 00 48 c7 c7 80 83 90 8a 48 8b 74 24 60 48 89 c2 e8 76 a7 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:ffffc90003dd7a60 EFLAGS: 00010246
RAX: 01de372cf0eb2a00 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90012135000 RSI: 0000000000005e9e RDI: 0000000000005e9f
RBP: ffff888018a580d8 R08: ffff8880b8e279db R09: 1ffff110171c4f3b
R10: dffffc0000000000 R11: ffffed10171c4f3c R12: ffffffff8a800540
R13: ffffc90003dd7ba0 R14: dffffc0000000000 R15: 0000000000000002
FS: 00007fed02c4d6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c42c166 CR3: 000000007e6c3000 CR4: 00000000003526f0
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: 0033:0x7fed01d9e159
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:00007fed02c4d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fed02026270 RCX: 00007fed01d9e159
RDX: 0000000000004000 RSI: 00002000000091c0 RDI: 0000000000000009
RBP: 00007fed01e3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fed02026308 R14: 00007fed02026270 R15: 00007ffeef551aa8
</TASK>
* Struck through repros no longer work on HEAD.