kernel panic: KASAN: panic_on_warn set ...

Status: upstream: reported on 2026/08/04 22:32
Reported-by: syzbot+e8c67c1de47f4d559a54@syzkaller.appspotmail.com
First crash: 5d20h, last: 5d20h
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel panic: KASAN: panic_on_warn set ... block fs 2 11 184d 478d 0/29 auto-obsoleted due to no activity on 2026/05/18 06:02
linux-6.1 kernel panic: KASAN: panic_on_warn set ... 2 3 5d16h 5d20h 0/3 upstream: reported on 2026/08/04 22:35
linux-5.15 kernel panic: KASAN: panic_on_warn set ... 2 10 5d17h 6d00h 0/3 upstream: reported on 2026/08/04 18:29

Sample crash report:
Kernel panic - not syncing: KASAN: panic_on_warn set ...
CPU: 1 PID: 5125 Comm: acpid Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 panic+0x2ca/0x720 kernel/panic.c:340
 check_panic_on_warn+0x84/0xa0 kernel/panic.c:236
 end_report+0x6f/0x130 mm/kasan/report.c:225
 kasan_report+0x128/0x150 mm/kasan/report.c:583
 sur40_command drivers/input/touchscreen/sur40.c:258 [inline]
 sur40_init drivers/input/touchscreen/sur40.c:352 [inline]
 sur40_open+0xa1/0x440 drivers/input/touchscreen/sur40.c:397
 input_open_device+0x171/0x2e0 drivers/input/input.c:654
 mousedev_open_device+0xc7/0x150 drivers/input/mousedev.c:430
 mousedev_open+0x2de/0x480 drivers/input/mousedev.c:556
 chrdev_open+0x58c/0x600 fs/char_dev.c:414
 do_dentry_open+0x880/0x14b0 fs/open.c:929
 do_open fs/namei.c:3683 [inline]
 path_openat+0x284f/0x3270 fs/namei.c:3844
 do_filp_open+0x1f2/0x430 fs/namei.c:3871
 do_sys_openat2+0x134/0x1d0 fs/open.c:1422
 do_sys_open fs/open.c:1437 [inline]
 __do_sys_openat fs/open.c:1453 [inline]
 __se_sys_openat fs/open.c:1448 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1448
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1920a0b407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe5e1be6a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1920981740 RCX: 00007f1920a0b407
RDX: 0000000000080800 RSI: 00007ffe5e1be8b0 RDI: ffffffffffffff9c
RBP: 00007ffe5e1be8b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000080
R13: 00007ffe5e1be9b0 R14: 000055cf6a5a77fe R15: 00007ffe5e1be9d0
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/04 22:31 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: KASAN: panic_on_warn set ...
* Struck through repros no longer work on HEAD.