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(c130bbd123a52545,0,ffffff0067b73188,ffff8000042df7a0,128) 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(67184f619686e1e7,ffffff0070ac31f0,5,3,ffffff007054c360) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(5bfc4fae4868f4b,830,ffff800021045778) at sys_flock+0x163 syscall(928e83a36bcd6b3e) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(928e83a36bcd6b3e) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,8adad467010) at Xsyscall+0x128 end of kernel end trace frame: 0x8b0049b8300, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff81bed205 lf_findoverlap+0x95 rbp 0xffff80002117ae60 rbx 0xdeaf4152deaf4152 rdx 0xffff8000034df000 rcx 0x106 rax 0xffff8000034df000 r8 0xffff80002117ae98 r9 0x1 r10 0x486c17480cd6b0e8 r11 0x407226d5cecb5e95 r12 0x2 r13 0xffffff0067b73188 r14 0xffff80002117ae98 r15 0 rip 0xffffffff81bed22b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002117ae00 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=269329 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800021044260,0xffff800021062280 process=0xffff800021065708 user=0xffff800021176000, vmspace=0xffffff00659b2e78 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78740 403381 62319 65534 2 0x10 syz-executor1 78740 291870 62319 65534 3 0x4000090 ttyout syz-executor1 78740 311585 62319 65534 2 0x4000010 syz-executor1 73921 146425 81070 65534 2 0x10 syz-executor0 *73921 269329 81070 65534 7 0x4000010 syz-executor0 73921 39987 81070 65534 2 0x4000090 syz-executor0 73921 152995 81070 65534 7 0x4000090 syz-executor0 62319 474421 82288 65534 3 0x90 nanosleep syz-executor1 82288 86459 53558 0 3 0x82 wait syz-executor1 81070 155949 67541 65534 3 0x90 nanosleep syz-executor0 67541 253437 53558 0 3 0x82 wait syz-executor0 74542 382698 0 0 3 0x14200 bored sosplice 53558 486852 32971 0 3 0x82 thrsleep syz-fuzzer 53558 24627 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 230240 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 125250 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 155738 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 287865 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 391518 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 139394 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 236929 32971 0 3 0x4000082 kqread syz-fuzzer 53558 522208 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 425737 32971 0 3 0x4000082 thrsleep syz-fuzzer 53558 217720 32971 0 3 0x4000082 thrsleep syz-fuzzer 32971 301697 66125 0 3 0x10008a pause ksh 66125 472386 22695 0 3 0x92 select sshd 11843 410024 1 0 3 0x100083 ttyin getty 22695 375582 1 0 3 0x80 select sshd 78507 457271 15142 73 3 0x100090 kqread syslogd 15142 180672 1 0 3 0x100082 netio syslogd 4697 207367 1 77 3 0x100090 poll dhclient 78988 83052 1 0 3 0x80 poll dhclient 52259 382280 0 0 2 0x14200 zerothread 62332 167081 0 0 3 0x14200 aiodoned aiodoned 85719 58247 0 0 3 0x14200 syncer update 18840 504935 0 0 3 0x14200 cleaner cleaner 53027 398819 0 0 3 0x14200 reaper reaper 52111 154006 0 0 3 0x14200 pgdaemon pagedaemon 78421 51380 0 0 3 0x14200 bored crynlk 31016 298037 0 0 3 0x14200 bored crypto 76174 382651 0 0 3 0x40014200 acpi0 acpi0 37554 222147 0 0 3 0x40014200 idle1 75780 488230 0 0 3 0x14200 bored softnet 52608 276678 0 0 3 0x14200 bored systqmp 58794 204522 0 0 3 0x14200 bored systq 63249 495808 0 0 3 0x40014200 bored softclock 37924 442377 0 0 3 0x40014200 idle0 1 170500 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper