panic: kernel diagnostic assertion "(p->pfik_flagrefs == 0) || (p->pfik_flagrefs == 1)" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pf_if.c", line 907
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*196538  86169      0           0  0x4000000    0K syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834bd81e) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834f9f7e,ffffffff8354f986,38b,ffffffff8346c679) at __assert+0x29 sys/kern/subr_prf.c:-1
pfi_clear_flags(ffff80003c3bf4e0,fffffffe) at pfi_clear_flags+0x41d sys/net/pf_if.c:893
pfioctl(24900,c028445a,ffff80003c3bf4e0,3,ffff800045ffd230) at pfioctl+0xf6a sys/net/pf_ioctl.c:3910
VOP_IOCTL(fffffd005f8a2c28,c028445a,ffff80003c3bf4e0,3,fffffd00097fd4e0,ffff800045ffd230) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd006c939ba0,c028445a,ffff80003c3bf4e0,ffff800045ffd230) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537
sys_ioctl(ffff800045ffd230,ffff80003c3bf6c0,ffff80003c3bf610) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c3bf6c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3bf6c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4df043742f0, count: 5
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{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: kernel diagnostic assertion "(p->pfik_flagrefs == 0) || (p->pfik_flagrefs == 1)" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pf_if.c", line 907
ddb{0}>