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(74f73bc7067f88e7,0,ffffff0069bb67a8,ffff80000173c260,128) 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(aed0ec573fe595f8,ffffff0069ce3628,8,3,ffffff006850acb8) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(aed0ec573f0f6a7d,830,ffff800021045778) at sys_flock+0x163 syscall(f057a96ac6a5e716) at syscall+0x496 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(f057a96ac6a5e716) at syscall+0x496 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,a9cc5ce00d8) at Xsyscall+0x128 end of kernel end trace frame: 0xa9f2755be70, count: -6 ddb{0}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff81b5d005 lf_findoverlap+0x95 rbp 0xffff800021117910 rbx 0xdeadbeefdeadbeef rdx 0xffff80000253d000 rcx 0x157 rax 0xffff80000253d000 r8 0xffff800021117958 r9 0 r10 0x54bd946ef9c689a0 r11 0x20610ff3cd7cf30 r12 0x2 r13 0xffffff0069bb67a8 r14 0xffff800021117958 r15 0 rip 0xffffffff81b5d02b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211178b0 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor0) pid=308857 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021044e18,0xffff800021044720 process=0xffff8000210649e8 user=0xffff800021112000, vmspace=0xffffff0065a73a58 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52315 237029 39416 32767 7 0x10 syz-executor0 52315 453152 39416 32767 3 0x4000090 fsleep syz-executor0 *52315 308857 39416 32767 7 0x4000010 syz-executor0 52315 282488 39416 32767 2 0x4000010 syz-executor0 7305 327227 87005 32767 3 0x90 nanosleep syz-executor1 7305 33723 87005 32767 3 0x4000090 nanosleep syz-executor1 7305 502367 87005 32767 3 0x4000090 nanosleep syz-executor1 39416 345289 23178 32767 3 0x90 nanosleep syz-executor0 23178 397575 19564 0 3 0x82 wait syz-executor0 87005 453400 53160 32767 3 0x90 nanosleep syz-executor1 53160 333316 19564 0 3 0x82 wait syz-executor1 92234 58471 0 0 3 0x14200 bored sosplice 19564 489205 97509 0 3 0x82 thrsleep syz-fuzzer 19564 481538 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 111433 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 286783 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 164090 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 15006 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 88381 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 270675 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 133918 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 294141 97509 0 3 0x4000082 kqread syz-fuzzer 19564 89401 97509 0 3 0x4000082 thrsleep syz-fuzzer 19564 272768 97509 0 3 0x4000082 thrsleep syz-fuzzer 97509 478985 18231 0 3 0x10008a pause ksh 18231 187832 86877 0 3 0x92 select sshd 39547 26313 1 0 3 0x100083 ttyin getty 86877 420131 1 0 3 0x80 select sshd 96530 11574 73807 73 3 0x100090 kqread syslogd 73807 486265 1 0 3 0x100082 netio syslogd 65440 245420 1 77 3 0x100090 poll dhclient 93332 251854 1 0 3 0x80 poll dhclient 27718 214609 0 0 3 0x14200 pgzero zerothread 12497 448862 0 0 3 0x14200 aiodoned aiodoned 33306 424619 0 0 3 0x14200 syncer update 17514 286797 0 0 3 0x14200 cleaner cleaner 93897 105963 0 0 3 0x14200 reaper reaper 78501 348033 0 0 3 0x14200 pgdaemon pagedaemon 9113 391356 0 0 3 0x14200 bored crynlk 58350 404439 0 0 3 0x14200 bored crypto 6044 64375 0 0 3 0x40014200 acpi0 acpi0 23135 47235 0 0 3 0x40014200 idle1 63171 427674 0 0 3 0x14200 bored softnet 46297 417034 0 0 3 0x14200 bored systqmp 48489 243919 0 0 3 0x14200 bored systq 70964 109094 0 0 3 0x40014200 bored softclock 98655 85026 0 0 3 0x40014200 idle0 1 487472 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper