panic: kernel diagnostic assertion "bpfilter_lookup(unit) == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/bpf.c", line 379
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 201710  52974      0           0          0    0  syz-executor
* 22166  52974      0           0  0x4000000    1K syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8344aac0) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff8348ad45,ffffffff8349dfaf,17b,ffffffff834a8a78) at __assert+0x29 sys/kern/subr_prf.c:-1
bpfopen(11700,1,2000,ffff80002a2427d8) at bpfopen+0x2bd bpfilter_lookup sys/net/bpf.c:1832 [inline]
bpfopen(11700,1,2000,ffff80002a2427d8) at bpfopen+0x2bd sys/net/bpf.c:379
spec_open_clone(ffff800035bbdfd8) at spec_open_clone+0x277 sys/kern/spec_vnops.c:722
spec_open(ffff800035bbdfd8) at spec_open+0x319 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd80649c88d0,1,fffffd80097fd680,ffff80002a2427d8) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff800035bbe218,201,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177
doopenat(ffff80002a2427d8,ffffff9c,200000000440,200,0,0,1c2164d92453d35) at doopenat+0x35b sys/kern/vfs_syscalls.c:1155
sys_openat(ffff80002a2427d8,ffff800035bbe4d0,ffff800035bbe420) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1094
syscall(ffff800035bbe4d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800035bbe4d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3e376d27890, count: 3
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