panic: kernel diagnostic assertion "bpfilter_lookup(unit) == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/bpf.c", line 379 Starting stack trace... panic(ffffffff834b83a9) at panic+0x1d0 sys/kern/subr_prf.c:229 __assert(ffffffff834f6c29,ffffffff83507025,17b,ffffffff835111c3) at __assert+0x29 sys/kern/subr_prf.c:-1 bpfopen(11700,1,2000,ffff80003c454030) at bpfopen+0x2bd bpfilter_lookup sys/net/bpf.c:1832 [inline] bpfopen(11700,1,2000,ffff80003c454030) at bpfopen+0x2bd sys/net/bpf.c:379 spec_open_clone(ffff80002a27fe08) at spec_open_clone+0x277 sys/kern/spec_vnops.c:722 spec_open(ffff80002a27fe08) at spec_open+0x319 sys/kern/spec_vnops.c:148 VOP_OPEN(fffffd806a96d718,1,fffffd80097fd750,ffff80003c454030) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 vn_open(ffff80002a280058,1,0) at vn_open+0x7a5 sys/kern/vfs_vnops.c:183 doopenat(ffff80003c454030,ffffff9c,200000000000,0,0,0,cf9b644137b8c71d) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff80003c454030,ffff80002a280310,ffff80002a280260) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80002a280310) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a280310) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc5790e2a810, count: 246 End of stack trace. syncing disks...