kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xbb: 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(481816f84612078,0,ffffff0076c0bb50,ffff800003f42fe0,128) at lf_findoverlap+0xbb sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xbc lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xbc sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(5103d9fb6fc871a0,ffffff00665238f0,8,2,ffffff0067a4a1e8) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(1504190104c1eef2,830,ffff8000210444b8) at sys_flock+0x163 syscall(eeef365d3e0d8424) at syscall+0x496 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(eeef365d3e0d8424) at syscall+0x496 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,2a7b76f5268) at Xsyscall+0x128 end of kernel end trace frame: 0x2a9df327930, count: -6 ddb{1}> show registers rdi 0xdead4110dead4110 rsi 0xffffffff81462205 lf_findoverlap+0x95 rbp 0xffff80002119b890 rbx 0xdead4110dead4110 rdx 0xffff800004544000 rcx 0xc68 rax 0xffff800004544000 r8 0xffff80002119b8d8 r9 0x1 r10 0x9921f5761e9033e r11 0x72eba4aa2f84defc r12 0x2 r13 0xffffff0076c0bb50 r14 0xffff80002119b8d8 r15 0 rip 0xffffffff8146222b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002119b830 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=452413 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800021044260,0xffffffff81f8d720 process=0xffff800021065708 user=0xffff800021196000, vmspace=0xffffff00695c4a60 estcpu=30, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44265 517791 82265 32767 3 0x90 nanosleep syz-executor1 44265 412712 82265 32767 3 0x4000090 ttyin syz-executor1 67335 473841 12516 32767 2 0x10 syz-executor0 67335 102847 12516 32767 7 0x4000010 syz-executor0 67335 325635 12516 32767 2 0x4000010 syz-executor0 67335 167215 12516 32767 3 0x4000090 fsleep syz-executor0 *67335 452413 12516 32767 7 0x4000010 syz-executor0 82265 495416 63348 32767 3 0x90 nanosleep syz-executor1 63348 100635 38613 0 3 0x82 wait syz-executor1 12516 204632 52180 32767 3 0x90 nanosleep syz-executor0 52180 321567 38613 0 3 0x82 wait syz-executor0 79460 76158 0 0 3 0x14200 bored sosplice 38613 7420 62171 0 3 0x82 kqread syz-fuzzer 38613 59167 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 389727 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 470600 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 436174 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 184938 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 319953 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 460181 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 219672 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 460528 62171 0 3 0x4000082 thrsleep syz-fuzzer 38613 8097 62171 0 3 0x4000082 thrsleep syz-fuzzer 62171 243299 57545 0 3 0x10008a pause ksh 57545 374110 32524 0 3 0x92 select sshd 78247 243801 1 0 3 0x100083 ttyin getty 32524 155388 1 0 3 0x80 select sshd 614 110362 37070 73 3 0x100090 kqread syslogd 37070 92820 1 0 3 0x100082 netio syslogd 29886 494172 1 77 3 0x100090 poll dhclient 69812 295822 1 0 3 0x80 poll dhclient 62037 218273 0 0 3 0x14200 pgzero zerothread 58055 523037 0 0 3 0x14200 aiodoned aiodoned 84452 316404 0 0 3 0x14200 syncer update 99520 432032 0 0 3 0x14200 cleaner cleaner 48777 15758 0 0 3 0x14200 reaper reaper 16172 483625 0 0 3 0x14200 pgdaemon pagedaemon 47680 427204 0 0 3 0x14200 bored crynlk 23990 467604 0 0 3 0x14200 bored crypto 51632 65658 0 0 3 0x40014200 acpi0 acpi0 39915 101805 0 0 3 0x40014200 idle1 78778 346283 0 0 3 0x14200 bored softnet 74126 490110 0 0 3 0x14200 bored systqmp 39309 463972 0 0 3 0x14200 bored systq 4664 154007 0 0 3 0x40014200 bored softclock 82570 415024 0 0 3 0x40014200 idle0 1 502649 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper