kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace lf_findoverlap(632a2bf5f1cb915f,0,ffffff00761c1cc8,ffff800000ad5820,128) 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(3ad92822a7c6b5df,ffffff006fa8b1e0,5,3,ffffff00740429d0) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(8250c4ba3bf4694b,830,ffff8000210639e0) at sys_flock+0x163 syscall(632a2bf5f1f95cc7) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(632a2bf5f1f95cc7) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,57bf3800010) at Xsyscall+0x128 end of kernel end trace frame: 0x57e38c615a0, count: -6 ddb{0}> show registers rdi 0xdeafbeaddeafbead rsi 0xffffffff818d9af5 lf_findoverlap+0x95 rbp 0xffff80002113d310 rbx 0xdeafbeaddeafbead rdx 0xffff8000024db000 rcx 0x9d3 rax 0xffff8000024db000 r8 0xffff80002113d348 r9 0 r10 0x1f679245f0eaf080 r11 0x3a859f2c3682ddb3 r12 0x2 r13 0xffffff00761c1cc8 r14 0xffff80002113d348 r15 0 rip 0xffffffff818d9b1b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002113d2b0 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor1) pid=269551 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021063530,0xffff800021062be0 process=0xffff800021065a50 user=0xffff800021138000, vmspace=0xffffff007f123d68 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18723 148637 4240 65534 2 0x10 syz-executor1 *18723 269551 4240 65534 7 0x4000010 syz-executor1 18723 453179 4240 65534 7 0x4000010 syz-executor1 18723 424805 4240 65534 2 0x4000010 syz-executor1 4240 380018 16133 65534 3 0x90 nanosleep syz-executor1 16133 405561 98486 0 3 0x82 wait syz-executor1 34438 164620 0 0 3 0x14200 bored sosplice 98486 295547 75100 0 3 0x82 kqread syz-fuzzer 98486 325768 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 54847 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 495235 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 173616 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 211319 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 469049 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 295893 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 184502 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 353543 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 464423 75100 0 3 0x4000082 thrsleep syz-fuzzer 98486 195230 75100 0 3 0x4000082 thrsleep syz-fuzzer 75100 8387 43067 0 3 0x10008a pause ksh 43067 219224 11465 0 3 0x92 select sshd 69015 86211 1 0 3 0x100083 ttyin getty 11465 483286 1 0 3 0x80 select sshd 2057 352010 11200 73 3 0x100090 kqread syslogd 11200 478383 1 0 3 0x100082 netio syslogd 37077 118423 1 77 3 0x100090 poll dhclient 11827 512369 1 0 3 0x80 poll dhclient 80979 359472 0 0 3 0x14200 pgzero zerothread 40401 347558 0 0 3 0x14200 aiodoned aiodoned 11731 236509 0 0 3 0x14200 syncer update 59687 160219 0 0 3 0x14200 cleaner cleaner 66133 322032 0 0 3 0x14200 reaper reaper 71068 412272 0 0 3 0x14200 pgdaemon pagedaemon 78698 249176 0 0 3 0x14200 bored crynlk 41163 213350 0 0 3 0x14200 bored crypto 94027 56317 0 0 3 0x40014200 acpi0 acpi0 24076 91654 0 0 3 0x40014200 idle1 26709 262934 0 0 3 0x14200 bored softnet 17026 306796 0 0 3 0x14200 bored systqmp 79676 56697 0 0 3 0x14200 bored systq 51057 112981 0 0 3 0x40014200 bored softclock 74788 369716 0 0 3 0x40014200 idle0 1 338105 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper