panic: unhandled af (6)

Status: upstream: reported on 2026/05/06 07:48
Reported-by: syzbot+18702aa07d5443a7e32b@syzkaller.appspotmail.com
First crash: 107d, last: now
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd panic: unhandled af 2 syz, C 21 2420d 2422d 3/4 fixed on 2020/01/09 12:20
openbsd panic: unhandled af (5) 2 5 305d 397d 0/4 auto-obsoleted due to no activity on 2026/01/18 09:28
openbsd panic: unhandled af (3) 2 syz 7 2234d 2243d 0/4 closed as invalid on 2020/10/03 07:42
openbsd panic: unhandled af (4) 2 syz 11 1672d 1701d 3/4 fixed on 2022/01/25 13:33
openbsd panic: unhandled af (2) 2 syz, C 22 2246d 2272d 3/4 fixed on 2020/06/28 14:37

Sample crash report:
panic: unhandled af 147
Starting stack trace...
panic(ffffffff834af708) at panic+0x1ba sys/kern/subr_prf.c:229
unhandled_af(93) at unhandled_af+0x1a sys/net/if.c:-1
if_output_tso(ffff8000002a3058,ffff80002a7bcdd0,ffff800000c57dd0,fffff8007a95f5d8,5dc) at if_output_tso+0x22b
ip_output(fffff8007abbc100,0,fffff8007ab01448,800,0,fffff8007ab014e0,96c6a1fce16bd225) at ip_output+0x107e sys/netinet/ip_output.c:437
tcp_output(ffff8000015bbb80) at tcp_output+0x3513 sys/netinet/tcp_output.c:1070
tcp_send(ffff800010fe0cf8,fffff8007abbc400,0,0) at tcp_send+0x191 sys/netinet/tcp_usrreq.c:859
sosend(ffff800010fe0cf8,0,ffff80002a7bd208,0,0,80) at sosend+0x804 sys/kern/uipc_socket.c:-1
dofilewritev(ffff80002a778d08,3,ffff80002a7bd208,0,ffff80002a7bd2b0) at dofilewritev+0x2bd sys/kern/sys_generic.c:384
sys_write(ffff80002a778d08,ffff80002a7bd360,ffff80002a7bd2b0) at sys_write+0xa2 sys/kern/sys_generic.c:300
syscall(ffff80002a7bd360) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80002a7bd360) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74191d9515d0, count: 246
End of stack trace.
syncing disks...

Crashes (160):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/21 18:04 openbsd 073728865af4 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/21 17:01 openbsd 073728865af4 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/21 13:14 openbsd 073728865af4 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/21 10:50 openbsd 073728865af4 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/21 09:21 openbsd 073728865af4 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/20 17:10 openbsd ea526e64a863 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/20 13:27 openbsd 1a498b6f2b58 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/19 20:50 openbsd f46fed5b255a 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/19 16:02 openbsd f46fed5b255a 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/19 11:31 openbsd aeb4a173c2e6 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/19 00:18 openbsd aeb4a173c2e6 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/18 21:27 openbsd c2844c6b7636 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/18 17:00 openbsd c2844c6b7636 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/18 13:36 openbsd c2844c6b7636 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/18 04:45 openbsd caeb0e649bb8 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/17 19:19 openbsd 3b8d610e537f 905244d6 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/17 04:34 openbsd 3b8d610e537f 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/17 03:14 openbsd ae3832a13713 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/17 01:37 openbsd ae3832a13713 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/16 10:43 openbsd 63d30f6f93ff 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/16 05:36 openbsd 63d30f6f93ff 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/16 01:21 openbsd 63d30f6f93ff 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/15 12:55 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/15 10:55 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/14 23:44 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/14 11:22 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/14 07:52 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: unhandled af
2026/08/14 00:30 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: unhandled af
2026/08/13 21:08 openbsd b8ee6bbd8ccb 4d118901 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/13 12:33 openbsd b8ee6bbd8ccb 4d118901 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/13 09:19 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/13 05:01 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: unhandled af
2026/08/13 04:09 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/13 02:57 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/13 01:31 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/12 23:56 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/12 13:22 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: unhandled af
2026/08/12 08:39 openbsd a47f863e5cb3 f8d35649 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/12 07:01 openbsd a47f863e5cb3 f8d35649 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/12 02:40 openbsd a47f863e5cb3 f8d35649 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/11 22:18 openbsd a47f863e5cb3 f8d35649 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/11 07:59 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/11 06:48 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/11 04:29 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/10 23:13 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/10 10:06 openbsd 422ca638c1d6 558388e4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/10 06:24 openbsd fab829404855 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/10 04:51 openbsd fab829404855 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/10 01:18 openbsd fab829404855 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/09 21:13 openbsd fab829404855 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/09 18:39 openbsd fab829404855 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: unhandled af
2026/08/09 17:18 openbsd 350de6efe927 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/09 11:58 openbsd 350de6efe927 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/09 10:37 openbsd 350de6efe927 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/09 02:23 openbsd 3dc8f332bbde 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/08/08 22:07 openbsd 3dc8f332bbde 5d63f80b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid panic: unhandled af
2026/05/06 07:48 openbsd eec9cf095b26 340bcdf0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore panic: unhandled af
* Struck through repros no longer work on HEAD.