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assert "bpfilter_lookup(unit) == NULL" failed in bpf.c

Status: upstream: reported on 2026/01/08 09:03
Reported-by: syzbot+a56d771d60f11124aac0@syzkaller.appspotmail.com
First crash: 97d, last: 1d04h

Sample crash report:
panic: kernel diagnostic assertion "bpfilter_lookup(unit) == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/bpf.c", line 379
Starting stack trace...
panic(ffffffff8344c0bd) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff8348ea64,ffffffff8349dc9a,17b,ffffffff834a750e) at __assert+0x29 sys/kern/subr_prf.c:-1
bpfopen(11700,8001,2000,ffff80002a232010) at bpfopen+0x2bd bpfilter_lookup sys/net/bpf.c:1832 [inline]
bpfopen(11700,8001,2000,ffff80002a232010) at bpfopen+0x2bd sys/net/bpf.c:379
spec_open_clone(ffff80002a28bdc8) at spec_open_clone+0x277 sys/kern/spec_vnops.c:722
spec_open(ffff80002a28bdc8) at spec_open+0x319 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd800b9db958,8001,fffffd80097fd820,ffff80002a232010) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff80002a28c018,8001,0) at vn_open+0x7a5 sys/kern/vfs_vnops.c:183
doopenat(ffff80002a232010,ffffff9c,200000000100,8000,0,0,774d8ce15963cc54) at doopenat+0x35b sys/kern/vfs_syscalls.c:1155
sys_openat(ffff80002a232010,ffff80002a28c2d0,ffff80002a28c220) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1094
syscall(ffff80002a28c2d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a28c2d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x598ce7a5990, count: 246
End of stack trace.

Crashes (28):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/14 09:01 openbsd bb890fd2477a 1a086e7c .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/13 15:06 openbsd ef90b149a753 9530ccf9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/13 04:37 openbsd 4ec71eeccea4 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/12 01:32 openbsd de62a587e27d 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/10 22:44 openbsd 411a0c209e89 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/10 22:31 openbsd 411a0c209e89 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/10 10:48 openbsd 7bdd0d20c161 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/10 04:18 openbsd 7bdd0d20c161 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/07 23:27 openbsd 7ed665c6a362 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/03 06:03 openbsd de6be2070bf6 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/03 00:40 openbsd 38cd3ff5d287 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/02 14:26 openbsd 8eafb9a57fa3 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/01 20:32 openbsd ffc378411de4 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/04/01 20:25 openbsd ffc378411de4 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/29 00:39 openbsd b39c1312a589 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/28 19:30 openbsd b39c1312a589 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/28 07:13 openbsd 9d790fdba930 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/28 07:11 openbsd 9d790fdba930 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/27 05:15 openbsd 2f434a4256f3 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/26 09:19 openbsd 84b7e477fd25 c6143aac .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/26 05:00 openbsd 84b7e477fd25 c6143aac .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/26 02:17 openbsd 84b7e477fd25 c6143aac .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/25 19:50 openbsd ee1bf64f5bae 4367a094 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/25 18:08 openbsd ee1bf64f5bae 4367a094 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/25 09:12 openbsd 87dc1fa97379 35e4ff71 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/25 03:51 openbsd 87dc1fa97379 35e4ff71 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/03/25 00:26 openbsd 87dc1fa97379 35e4ff71 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
2026/01/08 09:03 openbsd d77c41cf8f5a c1f5c7d0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "bpfilter_lookup(unit) == NULL" failed in bpf.c
* Struck through repros no longer work on HEAD.