ukernel: page fault trap, code=0 Stopped at VOP_ACCESS+0x3d: movq 0x8(%r13),%rax ddb{1}> ddb{1}> set $lines = 0 ddb{1}> show panic kernel page fault uvm_fault(0xffffff007f125d68, 0x8, 0, 1) -> e VOP_ACCESS(0,ffff8000210a3080,0,ffff800021194f48) at VOP_ACCESS+0x3d sys/kern/vfs_vops.c:189 end trace frame: 0xffff800021194ef0, count: 0 ddb{1}> trace VOP_ACCESS(0,ffff8000210a3080,0,ffff800021194f48) at VOP_ACCESS+0x3d sys/kern/vfs_vops.c:189 sys_unveil(720,ffff8000210a3080,ffff800021194fd0) at sys_unveil+0x263 sys/kern/vfs_syscalls.c:925 syscall(0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,8,0,2,f289757a0d8) at Xsyscall+0x128 end of kernel end trace frame: 0xf2adc594460, count: -4 ddb{1}> show registers rdi 0 rsi 0xffffffff8158641d VOP_ACCESS+0x2d rbp 0xffff8000211949e0 rbx 0xf2adc5943d8 rdx 0xffff800000cd6000 rcx 0x8c rax 0xffff800000cd6000 r8 0x40 r9 0xffffff007f7c78a0 r10 0xb513447c69614ac8 r11 0xffffffff818a2360 ufs_access r12 0x100 r13 0 r14 0xffff8000210a3080 r15 0xffffff007f7c78a0 rip 0xffffffff8158642d VOP_ACCESS+0x3d cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021194990 ss 0x10 VOP_ACCESS+0x3d: movq 0x8(%r13),%rax ddb{1}> show proc PROC (syz-executor0) pid=113715 stat=onproc flags process=10 proc=4000000 pri=60, usrpri=60, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a39e0,0xffffffff81ee6170 process=0xffff8000210b6cb8 user=0xffff800021190000, vmspace=0xffffff007f125d68 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53732 168396 83197 60929 7 0x10 syz-executor0 53732 402243 83197 60929 3 0x4000090 fsleep syz-executor0 *53732 113715 83197 60929 7 0x4000010 syz-executor0 51270 167091 1 0 3 0x100083 ttyin getty 54525 48815 0 0 3 0x14200 bored sosplice 44597 68960 86185 0 3 0x2 biowait syz-executor1 83197 387697 86185 0 3 0x82 nanosleep syz-executor0 86185 89531 9637 0 3 0x82 thrsleep syz-fuzzer 86185 427797 9637 0 3 0x4000082 nanosleep syz-fuzzer 86185 263831 9637 0 3 0x4000082 thrsleep syz-fuzzer 86185 398360 9637 0 3 0x4000082 thrsleep syz-fuzzer 86185 84475 9637 0 3 0x4000082 thrsleep syz-fuzzer 86185 196970 9637 0 3 0x4000082 thrsleep syz-fuzzer 86185 220749 9637 0 3 0x4000082 thrsleep syz-fuzzer 86185 228503 9637 0 3 0x4000082 thrsleep syz-fuzzer 86185 5209 9637 0 3 0x4000082 kqread syz-fuzzer 86185 163053 9637 0 3 0x4000082 thrsleep syz-fuzzer 9637 450237 62366 0 3 0x10008a pause ksh 62366 486766 3868 0 3 0x92 select sshd 3868 411205 1 0 3 0x80 select sshd 62499 368723 59943 73 2 0x100090 syslogd 59943 306936 1 0 3 0x100082 netio syslogd 51626 82525 1 77 3 0x100090 poll dhclient 31441 160580 1 0 3 0x80 poll dhclient 41849 63057 0 0 2 0x14200 zerothread 24044 220275 0 0 3 0x14200 aiodoned aiodoned 56477 383703 0 0 3 0x14200 syncer update 90560 256511 0 0 3 0x14200 cleaner cleaner 40545 516374 0 0 3 0x14200 reaper reaper 8496 456995 0 0 3 0x14200 pgdaemon pagedaemon 27730 146525 0 0 3 0x14200 bored crynlk 73904 358420 0 0 3 0x14200 bored crypto 31512 354345 0 0 3 0x40014200 acpi0 acpi0 76584 14612 0 0 3 0x40014200 idle1 95670 478158 0 0 3 0x14200 bored softnet 39910 224577 0 0 3 0x14200 bored systqmp 84876 301407 0 0 3 0x14200 bored systq 3220 26545 0 0 3 0x40014200 bored softclock 65518 171235 0 0 3 0x40014200 idle0 1 343669 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper