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,ffffff007b763201,ffff8000018d7760,ffffff00799cf4e8,0) 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(ffffff007520b108,5,3,ffffff007b763280,ffffff007f7c6b98) at VOP_ADVLOCK+0x67 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a3530,0) 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(0,0,ffffffffffffff4f,0,2,396cd89010) at Xsyscall+0x128 end of kernel end trace frame: 0x3bb86b9140, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff81950b15 lf_findoverlap+0x85 rbp 0xffff80002119d950 rbx 0xdeaf4152deaf4152 rdx 0xffff8000040de000 rcx 0x155b __ALIGN_SIZE+0x55b rax 0xffff8000040de000 r8 0xffff80002119d990 r9 0x1 r10 0x8eace8515d122247 r11 0xffffffff81540a80 pvclock_get_timecount r12 0x2 r13 0xffffff00799cf4e8 r14 0xffff80002119d990 r15 0 rip 0xffffffff81950b3b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002119d900 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=15563 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a32d8,0xffff8000210a3090 process=0xffff8000210b6340 user=0xffff800021198000, vmspace=0xffffff0065c51008 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71067 179662 84271 65534 2 0x10 syz-executor1 *71067 15563 84271 65534 7 0x4000010 syz-executor1 71067 479508 84271 65534 7 0x4000010 syz-executor1 71067 264843 84271 65534 2 0x4000010 syz-executor1 84271 454841 8787 65534 3 0x90 nanosleep syz-executor1 8787 34034 80439 0 3 0x82 wait syz-executor1 62005 404829 90082 65534 3 0x90 nanosleep syz-executor0 90082 412874 80439 0 3 0x82 wait syz-executor0 11334 348602 0 0 3 0x14200 bored sosplice 80439 21887 45636 0 3 0x82 kqread syz-fuzzer 80439 314186 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 520921 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 454325 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 43865 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 136667 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 102483 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 258761 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 105508 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 314267 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 201848 45636 0 3 0x4000082 thrsleep syz-fuzzer 80439 243803 45636 0 3 0x4000082 thrsleep syz-fuzzer 45636 384110 97944 0 3 0x10008a pause ksh 97944 352234 69813 0 3 0x92 select sshd 75293 477615 1 0 3 0x100083 ttyin getty 69813 339541 1 0 3 0x80 select sshd 96980 275905 11888 73 3 0x100090 kqread syslogd 11888 317527 1 0 3 0x100082 netio syslogd 62650 156633 1 77 3 0x100090 poll dhclient 33713 335924 1 0 3 0x80 poll dhclient 85530 313573 0 0 3 0x14200 pgzero zerothread 87311 149786 0 0 3 0x14200 aiodoned aiodoned 53394 434764 0 0 3 0x14200 syncer update 44536 369265 0 0 3 0x14200 cleaner cleaner 41842 455583 0 0 3 0x14200 reaper reaper 33973 30812 0 0 3 0x14200 pgdaemon pagedaemon 68401 94036 0 0 3 0x14200 bored crynlk 46656 290713 0 0 3 0x14200 bored crypto 60503 156069 0 0 3 0x40014200 acpi0 acpi0 56710 346170 0 0 3 0x40014200 idle1 63386 213568 0 0 3 0x14200 bored softnet 36237 114238 0 0 3 0x14200 bored systqmp 79938 163599 0 0 3 0x14200 bored systq 10706 256292 0 0 3 0x40014200 bored softclock 65002 523311 0 0 3 0x40014200 idle0 1 201997 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper