kernel panic: kernel: panic_on_warn set ...

Status: upstream: reported on 2026/08/04 21:06
Reported-by: syzbot+ba58810472c35a9721f2@syzkaller.appspotmail.com
First crash: 4d22h, last: 2d02h
Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel panic: kernel: panic_on_warn set ... kernel 2 1 590d 586d 0/29 auto-obsoleted due to no activity on 2025/03/27 03:23
linux-5.15 kernel panic: kernel: panic_on_warn set ... (2) 2 3 4d16h 33d 0/3 upstream: reported on 2026/07/07 08:59
android-5-10 kernel panic: kernel: panic_on_warn set ... 2 1 5d04h 5d04h 0/2 premoderation: reported on 2026/08/04 14:18
linux-5.15 kernel panic: kernel: panic_on_warn set ... 2 1 243d 243d 0/3 auto-obsoleted due to no activity on 2026/03/19 11:08
linux-6.1 kernel panic: kernel: panic_on_warn set ... 2 9 4d16h 4d21h 0/3 upstream: reported on 2026/08/04 21:46
upstream kernel panic: kernel: panic_on_warn set ... (3) nfc 2 66 2d06h 18h59m 0/29 upstream: reported on 2026/08/09 00:09
upstream kernel panic: kernel: panic_on_warn set ... (2) net 2 64 263d 300d 0/29 auto-obsoleted due to no activity on 2026/01/19 08:34
android-6-1 kernel panic: kernel: panic_on_warn set ... 2 1 5d03h 5d03h 0/2 premoderation: reported on 2026/08/04 15:27

Sample crash report:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 PID: 3458 Comm: kworker/u4:9 Tainted: G S                 syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: phy13 ieee80211_csa_finalize_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 panic+0x2ca/0x720 kernel/panic.c:340
 check_panic_on_warn kernel/panic.c:236 [inline]
 __warn+0x2e0/0x470 kernel/panic.c:681
 __report_bug lib/bug.c:199 [inline]
 report_bug+0x2be/0x4f0 lib/bug.c:219
 handle_bug+0xcf/0x120 arch/x86/kernel/traps.c:310
 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:345
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:606
RIP: 0010:ieee80211_chanctx_reserved_chandef net/mac80211/chan.c:92 [inline]
RIP: 0010:ieee80211_chsw_switch_hwconf net/mac80211/chan.c:1422 [inline]
RIP: 0010:ieee80211_vif_use_reserved_switch+0x110e/0x2900 net/mac80211/chan.c:1638
Code: 48 89 df e8 d4 44 d0 f7 e9 d6 fc ff ff e8 7a c2 77 f7 eb 24 e8 73 c2 77 f7 c7 04 24 f4 ff ff ff e9 cc f5 ff ff e8 62 c2 77 f7 <0f> 0b 0f 0b e9 b7 f5 ff ff e8 54 c2 77 f7 48 8b 7c 24 08 4c 8b 74
RSP: 0018:ffffc9000c72f9c0 EFLAGS: 00010293
RAX: ffffffff8a0fab12 RBX: 0000000000000001 RCX: ffff88802dbf3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff8880638cd62f R09: 1ffff1100c719ac5
R10: dffffc0000000000 R11: ffffed100c719ac6 R12: 0000000000000001
R13: ffff8880638ce659 R14: ffff888025552d48 R15: ffff888142baf800
 ieee80211_link_use_reserved_context+0x37b/0x5c0 net/mac80211/chan.c:1927
 __ieee80211_csa_finalize net/mac80211/cfg.c:3669 [inline]
 ieee80211_csa_finalize+0x571/0xeb0 net/mac80211/cfg.c:3708
 ieee80211_csa_finalize_work+0xf6/0x140 net/mac80211/cfg.c:3733
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (30):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/07 16:14 linux-6.6.y 6436c12a2ced e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/07 16:14 linux-6.6.y 6436c12a2ced e4ef95d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/06 00:50 linux-6.6.y aa0e49877a2e cd5b1963 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 07:22 linux-6.6.y aa0e49877a2e 52aa2820 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 02:43 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 02:40 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 02:26 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 02:20 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 02:20 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 02:01 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:58 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:51 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:39 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:27 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:26 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:26 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:13 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 01:07 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 00:57 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/05 00:24 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 23:29 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 23:13 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 22:57 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 22:05 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 22:01 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 21:53 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 21:42 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 21:39 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 21:37 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
2026/08/04 21:06 linux-6.6.y aa0e49877a2e d4abbeac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan kernel panic: kernel: panic_on_warn set ...
* Struck through repros no longer work on HEAD.