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,ffffff00664c5101,ffff8000018d7c60,ffffff0069e78790,0) at lf_findoverlap+0xab sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xad lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xad sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(ffffff0071037bd0,b,3,ffffff00664c51c8,ffffff007f7c6000) at VOP_ADVLOCK+0x67 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a24c8,0) at sys_flock+0x156 syscall(0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,e90387d40d8) at Xsyscall+0x128 end of kernel end trace frame: 0xe92a4d0b960, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff815f7ca5 lf_findoverlap+0x85 rbp 0xffff8000211fae30 rbx 0xdeaf4152deaf4152 rdx 0xffff8000024da000 rcx 0xcbf rax 0xffff8000024da000 r8 0xffff8000211fae70 r9 0x1 r10 0x54485bb9d3129cdf r11 0xffffffff8178b9c0 pvclock_get_timecount r12 0x2 r13 0xffffff0069e78790 r14 0xffff8000211fae70 r15 0 rip 0xffffffff815f7ccb lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211fade0 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=127161 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a3c38,0xffff8000210a3540 process=0xffff8000210b7630 user=0xffff8000211f6000, vmspace=0xffffff007f124d68 estcpu=22, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92885 212553 61184 65534 2 0x10 syz-executor0 92885 262755 61184 65534 3 0x4000090 lockf syz-executor0 *92885 127161 61184 65534 7 0x4000010 syz-executor0 92885 319803 61184 65534 7 0x4000010 syz-executor0 92885 309581 61184 65534 2 0x4000010 syz-executor0 95828 394962 57967 65534 3 0x90 piperd syz-executor1 57967 433908 41851 0 3 0x82 wait syz-executor1 61184 109028 78987 65534 3 0x90 nanosleep syz-executor0 78987 43726 41851 0 3 0x82 wait syz-executor0 81049 511135 0 0 3 0x14200 bored sosplice 41851 310115 2366 0 3 0x82 thrsleep syz-fuzzer 41851 61186 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 513050 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 47321 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 182317 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 515952 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 30475 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 338093 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 17014 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 163025 2366 0 3 0x4000082 kqread syz-fuzzer 41851 272680 2366 0 3 0x4000082 thrsleep syz-fuzzer 41851 482460 2366 0 3 0x4000082 thrsleep syz-fuzzer 2366 509975 91625 0 3 0x10008a pause ksh 91625 200312 35478 0 3 0x92 select sshd 66913 349467 1 0 3 0x100083 ttyin getty 35478 358471 1 0 3 0x80 select sshd 50398 119423 60611 73 3 0x100090 kqread syslogd 60611 254976 1 0 3 0x100082 netio syslogd 92430 87697 1 77 3 0x100090 poll dhclient 33263 134000 1 0 3 0x80 poll dhclient 78632 18326 0 0 3 0x14200 pgzero zerothread 78125 456155 0 0 3 0x14200 aiodoned aiodoned 38525 486747 0 0 3 0x14200 syncer update 7732 35543 0 0 3 0x14200 cleaner cleaner 8427 75372 0 0 3 0x14200 reaper reaper 66650 273740 0 0 3 0x14200 pgdaemon pagedaemon 44459 514210 0 0 3 0x14200 bored crynlk 64457 442970 0 0 3 0x14200 bored crypto 26957 239366 0 0 3 0x40014200 acpi0 acpi0 93881 151035 0 0 3 0x40014200 idle1 25630 271577 0 0 3 0x14200 bored softnet 29640 459466 0 0 3 0x14200 bored systqmp 21314 58456 0 0 3 0x14200 bored systq 83807 388645 0 0 3 0x40014200 bored softclock 86919 109076 0 0 3 0x40014200 idle0 1 281493 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper