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
*370065  82837      0           0  0x4000000    0  syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834146dc) at panic+0x1cf sys/kern/subr_prf.c:198
__assert(ffffffff83453987,ffffffff8343e3d5,17b,ffffffff8346ddf5) at __assert+0x29 sys/kern/subr_prf.c:-1
bpfopen(11700,8001,2000,ffff80003c90a2b8) at bpfopen+0x27d
spec_open_clone(ffff8000380df5c8) at spec_open_clone+0x277 sys/kern/spec_vnops.c:722
spec_open(ffff8000380df5c8) at spec_open+0x316 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806e9e1cd0,8001,fffffd8007ffd548,ffff80003c90a2b8) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138
vn_open(ffff8000380df810,8001,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177
doopenat(ffff80003c90a2b8,ffffff9c,200000000000,8000,0,0,dd4e9c1c8466a5d4) at doopenat+0x352 sys/kern/vfs_syscalls.c:1155
sys_open(ffff80003c90a2b8,ffff8000380dfab0,ffff8000380dfa00) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063
syscall(ffff8000380dfab0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff8000380dfab0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6c7378d7fe0, 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>