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(c2bfbd8facbaae1d,0,ffffff0072c16428,ffff8000018d8820,124) 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(ba998508b23b1a55,ffffff007bdd31e8,7,1,ffffff0069256218) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(8392ebec3d4cce4d,830,ffff800021072018) at sys_flock+0x163 syscall(c08e81e5c54a5f4f) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(c08e81e5c54a5f4f) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,d490bc9a0d8) at Xsyscall+0x128 end of kernel end trace frame: 0xd4bbc9bec90, count: -6 ddb{1}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff8143f825 lf_findoverlap+0x95 rbp 0xffff8000211a55a0 rbx 0xdeadbeefdeadbeef rdx 0xffff800001ad9000 rcx 0x18a rax 0xffff800001ad9000 r8 0xffff8000211a55d8 r9 0x1 r10 0xfbc5858a87d93022 r11 0x38fada91961d9616 r12 0x2 r13 0xffffff0072c16428 r14 0xffff8000211a55d8 r15 0 rip 0xffffffff8143f84b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211a5540 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=431522 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000210732d8,0xffff800021073798 process=0xffff8000210aad38 user=0xffff8000211a0000, vmspace=0xffffff0065991a58 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31004 66646 1776 65534 7 0x10 syz-executor1 31004 301373 1776 65534 3 0x4000090 fsleep syz-executor1 *31004 431522 1776 65534 7 0x4000010 syz-executor1 31004 196750 1776 65534 2 0x4000010 syz-executor1 21383 302800 36033 65534 3 0x90 nanosleep syz-executor0 36033 215968 18091 0 3 0x82 wait syz-executor0 1776 86963 45761 65534 3 0x90 nanosleep syz-executor1 45761 56813 18091 0 3 0x82 wait syz-executor1 76139 330168 0 0 3 0x14200 bored sosplice 18091 24859 92383 0 3 0x82 thrsleep syz-fuzzer 18091 473827 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 231365 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 414534 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 235544 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 389288 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 148052 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 202017 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 143199 92383 0 3 0x4000082 thrsleep syz-fuzzer 18091 400549 92383 0 3 0x4000082 kqread syz-fuzzer 92383 142439 39158 0 3 0x10008a pause ksh 39158 57888 67419 0 3 0x92 select sshd 31241 362496 1 0 3 0x100083 ttyin getty 67419 14126 1 0 3 0x80 select sshd 77550 151233 69584 73 3 0x100090 kqread syslogd 69584 340152 1 0 3 0x100082 netio syslogd 2269 354086 1 77 3 0x100090 poll dhclient 35077 97585 1 0 3 0x80 poll dhclient 95000 486333 0 0 3 0x14200 pgzero zerothread 54616 429868 0 0 3 0x14200 aiodoned aiodoned 40355 116025 0 0 3 0x14200 syncer update 34668 438686 0 0 3 0x14200 cleaner cleaner 45352 206330 0 0 3 0x14200 reaper reaper 22247 218638 0 0 3 0x14200 pgdaemon pagedaemon 67767 431252 0 0 3 0x14200 bored crynlk 27038 131207 0 0 3 0x14200 bored crypto 33996 256079 0 0 3 0x40014200 acpi0 acpi0 31098 204416 0 0 3 0x40014200 idle1 28976 249520 0 0 3 0x14200 bored softnet 74967 54731 0 0 3 0x14200 bored systqmp 52578 45821 0 0 3 0x14200 bored systq 28363 451769 0 0 3 0x40014200 bored softclock 24502 3121 0 0 3 0x40014200 idle0 1 484733 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper