panic: kernel diagnostic assertion "bpfilter_lookup(unit) == NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/bpf.c", line 379
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*376541  13177      0           0  0x4000000    0  syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8341a02e) at panic+0x1cf sys/kern/subr_prf.c:198
__assert(ffffffff834542f5,ffffffff83439a9a,17b,ffffffff834695aa) at __assert+0x29 sys/kern/subr_prf.c:-1
bpfopen(11700,11,2000,ffff80002a776010) at bpfopen+0x27d
spec_open_clone(ffff80003a8fd838) at spec_open_clone+0x277 sys/kern/spec_vnops.c:722
spec_open(ffff80003a8fd838) at spec_open+0x316 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80634da398,11,fffffd8007ffd8f0,ffff80002a776010) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138
vn_open(ffff80003a8fda90,11,0) at vn_open+0x7a5 sys/kern/vfs_vnops.c:183
doopenat(ffff80002a776010,ffffff9c,200000000100,10,0,0,254ef3701f72d91f) at doopenat+0x352 sys/kern/vfs_syscalls.c:1155
sys_openat(ffff80002a776010,ffff80003a8fdd30,ffff80003a8fdc80) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1094
syscall(ffff80003a8fdd30) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003a8fdd30) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdb05f9176c0, count: 3
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb> 
ddb> set $lines = 0
ddb>