kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> ddb{1}> set $lines = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace lf_findoverlap(0,ffffff0065f77301,ffff8000018d72e0,ffffff0066763440,0) at lf_findoverlap+0xab sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xad lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xad sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(ffffff0068daacc0,5,3,ffffff0065f77378,ffffff007f7c6000) at VOP_ADVLOCK+0x67 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a32d8,0) at sys_flock+0x156 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,ffffffffffffff4f,0,2,3a0b6d1d010) at Xsyscall+0x128 end of kernel end trace frame: 0x3a363982200, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff81950b15 lf_findoverlap+0x85 rbp 0xffff8000211999a0 rbx 0xdeaf4152deaf4152 rdx 0xffff8000040dd000 rcx 0x11b rax 0xffff8000040dd000 r8 0xffff8000211999e0 r9 0x1 r10 0xdf15751a7c27d61c r11 0xffffffff81540a80 pvclock_get_timecount r12 0x2 r13 0xffffff0066763440 r14 0xffff8000211999e0 r15 0 rip 0xffffffff81950b3b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021199950 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=413433 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=66, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a2bd0,0xffff8000210a3c48 process=0xffff8000210b6668 user=0xffff800021194000, vmspace=0xffffff0065b91950 estcpu=16, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25708 223269 84381 65534 2 0x10 syz-executor0 *25708 413433 84381 65534 7 0x4000010 syz-executor0 25708 449249 84381 65534 2 0x4000010 syz-executor0 25708 260214 84381 65534 7 0x4000090 syz-executor0 86965 429600 61239 65534 3 0x90 nanosleep syz-executor1 61239 390673 58574 0 3 0x82 wait syz-executor1 84381 2673 35705 65534 3 0x90 nanosleep syz-executor0 35705 352032 58574 0 3 0x82 wait syz-executor0 54177 514082 0 0 3 0x14200 bored sosplice 58574 477663 4884 0 3 0x82 thrsleep syz-fuzzer 58574 389838 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 198074 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 35295 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 46536 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 127474 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 523327 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 224140 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 211381 4884 0 3 0x4000082 thrsleep syz-fuzzer 58574 93491 4884 0 3 0x4000082 kqread syz-fuzzer 4884 197263 58641 0 3 0x10008a pause ksh 58641 336201 94734 0 3 0x92 select sshd 14024 317673 1 0 3 0x100083 ttyin getty 94734 79716 1 0 3 0x80 select sshd 70797 37319 16201 73 3 0x100090 kqread syslogd 16201 41560 1 0 3 0x100082 netio syslogd 21561 57685 1 77 3 0x100090 poll dhclient 95732 208 1 0 3 0x80 poll dhclient 58144 261156 0 0 3 0x14200 pgzero zerothread 61273 456367 0 0 3 0x14200 aiodoned aiodoned 60027 72161 0 0 3 0x14200 syncer update 17292 321533 0 0 3 0x14200 cleaner cleaner 60018 326359 0 0 3 0x14200 reaper reaper 93250 30834 0 0 3 0x14200 pgdaemon pagedaemon 9468 524026 0 0 3 0x14200 bored crynlk 98758 404224 0 0 3 0x14200 bored crypto 89905 284473 0 0 3 0x40014200 acpi0 acpi0 49903 86158 0 0 3 0x40014200 idle1 24022 402711 0 0 3 0x14200 bored softnet 11980 445722 0 0 3 0x14200 bored systqmp 31489 159810 0 0 3 0x14200 bored systq 12127 466039 0 0 3 0x40014200 bored softclock 88606 295485 0 0 3 0x40014200 idle0 1 40369 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper