kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xea: movq 0x18(%r15),%rax ddb{1}> ddb{1}> set $lines = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace lf_findoverlap(ddd651d9d5befeea,0,ffffff0075e92a28,ffff800000937c20,20) at lf_findoverlap+0xea sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xdc lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xdc sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(822eb6299384d1d9,ffffff0075f51888,ffff800020fe39e0,0,ffffff0064dce838) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(1f405cbc8dddc4e5,0,ffff800020fe39e0) at sys_flock+0x1c8 syscall(2a10b1fb10b1cc0f) at syscall+0x5a0 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(2a10b1fb10b1cc0f) at syscall+0x5a0 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,bd455ffa0d8) at Xsyscall+0x128 end of kernel end trace frame: 0xbd72820eeb0, count: -6 ddb{1}> show registers rdi 0xffffffff81979d65 lf_findoverlap+0xc5 rsi 0xee rbp 0xffff8000211012b0 rbx 0xffffff0075e92a28 rdx 0xef rcx 0xffff800000b43000 rax 0xffff800000b43000 r8 0xffff8000211012f8 r9 0x1 r10 0xe84290a717442089 r11 0x7dd149d61233a9d1 r12 0x2 r13 0 r14 0xffff8000211012f8 r15 0xdeaf4152deaf4152 rip 0xffffffff81979d8a lf_findoverlap+0xea cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021101250 ss 0x10 lf_findoverlap+0xea: movq 0x18(%r15),%rax ddb{1}> show proc PROC (syz-executor0) pid=250834 stat=onproc flags process=0 proc=4000000 pri=40, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020fe2720,0xffff800020fe3090 process=0xffff800020fe4d30 user=0xffff8000210fc000, vmspace=0xffffff007f00c210 estcpu=29, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25564 399469 31441 0 2 0 syz-executor0 25564 451258 31441 0 3 0x4000080 lockf syz-executor0 *25564 250834 31441 0 7 0x4000000 syz-executor0 25564 333071 31441 0 3 0x4000080 fsleep syz-executor0 25564 293744 31441 0 2 0x4000000 syz-executor0 83039 184480 63378 0 7 0 syz-executor1 83039 72921 63378 0 3 0x4000080 fsleep syz-executor1 83039 246895 63378 0 3 0x4000080 kqread syz-executor1 83039 508742 63378 0 2 0x4000080 syz-executor1 83450 34742 1 0 3 0x100083 ttyin getty 22697 393418 0 0 3 0x14200 bored sosplice 63378 323096 65065 0 3 0x82 nanosleep syz-executor1 31441 269167 65065 0 2 0x2 syz-executor0 65065 438780 85914 0 3 0x82 kqread syz-fuzzer 65065 430359 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 239639 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 496324 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 177696 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 259692 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 480170 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 522707 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 178444 85914 0 3 0x4000082 thrsleep syz-fuzzer 65065 263523 85914 0 3 0x4000082 thrsleep syz-fuzzer 85914 326515 15450 0 3 0x10008a pause ksh 15450 73885 90479 0 3 0x92 select sshd 90479 286886 1 0 3 0x80 select sshd 5340 487284 61312 73 3 0x100090 kqread syslogd 61312 86076 1 0 3 0x100082 netio syslogd 60715 276425 1 77 3 0x100090 poll dhclient 1193 320860 1 0 3 0x80 poll dhclient 74538 259052 0 0 2 0x14200 zerothread 37093 204456 0 0 3 0x14200 aiodoned aiodoned 95464 463398 0 0 3 0x14200 syncer update 12030 190331 0 0 3 0x14200 cleaner cleaner 63156 83571 0 0 3 0x14200 reaper reaper 22364 29311 0 0 3 0x14200 pgdaemon pagedaemon 59943 345802 0 0 3 0x14200 bored crynlk 73264 181883 0 0 3 0x14200 bored crypto 56980 287755 0 0 3 0x40014200 acpi0 acpi0 54262 3477 0 0 3 0x40014200 idle1 89089 425267 0 0 3 0x14200 bored softnet 57340 177583 0 0 3 0x14200 bored systqmp 16980 439743 0 0 3 0x14200 bored systq 99312 471073 0 0 3 0x40014200 bored softclock 33099 72695 0 0 3 0x40014200 idle0 1 55519 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper