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,ffffff0078adf548,ffff8000042dc8e0,128,0) at lf_findoverlap+0xab sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xac lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xac sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(ffffff0074a12978,5,3,ffffff0074975090,ffffff007f7c6d40) at VOP_ADVLOCK+0x61 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a39e0,0) at sys_flock+0x156 syscall(0) at syscall+0x466 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x466 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,5b226c42010) at Xsyscall+0x128 end of kernel end trace frame: 0x5b44d8376d0, count: -6 ddb{1}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff810cdc35 lf_findoverlap+0x85 rbp 0xffff800021170eb0 rbx 0xdeadbeefdeadbeef rdx 0xffff8000024d8000 rcx 0xb3b rax 0xffff8000024d8000 r8 0xffff800021170ef0 r9 0x1 r10 0x4c5d763311c36483 r11 0xffff8000210a3530 r12 0x2 r13 0xffffff0078adf548 r14 0xffff800021170ef0 r15 0 rip 0xffffffff810cdc5b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021170e60 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=302482 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a2978,0xffff8000210a3090 process=0xffff8000210a46a0 user=0xffff80002116c000, vmspace=0xffffff006593d428 estcpu=27, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15333 364445 25641 65534 2 0x10 syz-executor0 *15333 302482 25641 65534 7 0x4000010 syz-executor0 15333 483377 25641 65534 7 0x4000010 syz-executor0 15333 276506 25641 65534 2 0x4000010 syz-executor0 25641 187780 16035 65534 3 0x90 nanosleep syz-executor0 16035 169494 253 0 3 0x82 wait syz-executor0 65203 464973 82091 65534 3 0x90 nanosleep syz-executor1 82091 216485 253 0 3 0x82 wait syz-executor1 47774 49854 0 0 3 0x14200 bored sosplice 253 87533 86859 0 3 0x82 thrsleep syz-fuzzer 253 35710 86859 0 3 0x4000082 thrsleep syz-fuzzer 253 237266 86859 0 3 0x4000082 thrsleep syz-fuzzer 253 312709 86859 0 3 0x4000082 thrsleep syz-fuzzer 253 448975 86859 0 3 0x4000082 thrsleep syz-fuzzer 253 279508 86859 0 3 0x4000082 thrsleep syz-fuzzer 253 111443 86859 0 3 0x4000082 thrsleep syz-fuzzer 253 56991 86859 0 3 0x4000082 kqread syz-fuzzer 253 474612 86859 0 3 0x4000082 thrsleep syz-fuzzer 253 85089 86859 0 3 0x4000082 thrsleep syz-fuzzer 86859 219319 56757 0 3 0x10008a pause ksh 56757 320424 45640 0 3 0x92 select sshd 77350 383083 1 0 3 0x100083 ttyin getty 45640 329498 1 0 3 0x80 select sshd 63093 202 56401 73 3 0x100090 kqread syslogd 56401 400578 1 0 3 0x100082 netio syslogd 93093 34488 1 77 3 0x100090 poll dhclient 52166 436878 1 0 3 0x80 poll dhclient 89292 308719 0 0 3 0x14200 pgzero zerothread 51173 352580 0 0 3 0x14200 aiodoned aiodoned 25089 249427 0 0 3 0x14200 syncer update 24918 308363 0 0 3 0x14200 cleaner cleaner 94275 52052 0 0 3 0x14200 reaper reaper 86978 48852 0 0 3 0x14200 pgdaemon pagedaemon 47028 213380 0 0 3 0x14200 bored crynlk 64390 345535 0 0 3 0x14200 bored crypto 95345 212685 0 0 3 0x40014200 acpi0 acpi0 36736 24672 0 0 3 0x40014200 idle1 58518 29987 0 0 3 0x14200 bored softnet 64809 365663 0 0 3 0x14200 bored systqmp 13444 41944 0 0 3 0x14200 bored systq 61861 117287 0 0 3 0x40014200 bored softclock 26196 174861 0 0 3 0x40014200 idle0 1 6428 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper