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,ffffff007e7cdcc8,ffff8000016d7ee0,128,0) at lf_findoverlap+0xab sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xac lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xac sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(ffffff0062d43090,5,3,ffffff0067100640,ffffff007f7c64f8) at VOP_ADVLOCK+0x61 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210cb080,0) at sys_flock+0x156 syscall(0) at syscall+0x466 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x466 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,e49eee38010) at Xsyscall+0x128 end of kernel end trace frame: 0xe4c0c3aff00, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff810cdc35 lf_findoverlap+0x85 rbp 0xffff80002119b7c0 rbx 0xdeaf4152deaf4152 rdx 0xffff800000ed7000 rcx 0x151 rax 0xffff800000ed7000 r8 0xffff80002119b800 r9 0x1 r10 0xb938bbd2dadefeaa r11 0xffff8000210cabd0 r12 0x2 r13 0xffffff007e7cdcc8 r14 0xffff80002119b800 r15 0 rip 0xffffffff810cdc5b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002119b770 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=210396 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff8000210ca978,0xffff8000210cb798 process=0xffff8000210da018 user=0xffff800021196000, vmspace=0xffffff007f124d68 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41171 316692 62339 65534 2 0x10 syz-executor1 41171 291800 62339 65534 3 0x4000090 fsleep syz-executor1 41171 398005 62339 65534 3 0x4000090 fsleep syz-executor1 41171 493620 62339 65534 7 0x4000010 syz-executor1 24984 277875 66753 65534 2 0x10 syz-executor0 *24984 210396 66753 65534 7 0x4000010 syz-executor0 24984 20585 66753 65534 2 0x4000010 syz-executor0 24984 378398 66753 65534 2 0x4000010 syz-executor0 24984 81593 66753 65534 3 0x4000090 fsleep syz-executor0 62339 189460 32080 65534 3 0x90 nanosleep syz-executor1 32080 186424 33734 0 3 0x82 wait syz-executor1 66753 23537 44052 65534 3 0x90 nanosleep syz-executor0 44052 9382 33734 0 3 0x82 wait syz-executor0 19077 119107 0 0 3 0x14200 bored sosplice 33734 463676 64907 0 3 0x82 thrsleep syz-fuzzer 33734 324520 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 501397 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 178384 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 67585 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 8730 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 296036 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 312220 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 332936 64907 0 3 0x4000082 thrsleep syz-fuzzer 33734 359160 64907 0 3 0x4000082 kqread syz-fuzzer 64907 445484 15698 0 3 0x10008a pause ksh 15698 243711 40267 0 3 0x92 select sshd 35034 2987 1 0 3 0x100083 ttyin getty 40267 94763 1 0 3 0x80 select sshd 87844 145421 78357 73 3 0x100090 kqread syslogd 78357 347658 1 0 3 0x100082 netio syslogd 41508 376620 1 77 3 0x100090 poll dhclient 64388 51818 1 0 3 0x80 poll dhclient 39332 477310 0 0 2 0x14200 zerothread 29504 49126 0 0 3 0x14200 aiodoned aiodoned 95506 229504 0 0 3 0x14200 syncer update 58972 273658 0 0 3 0x14200 cleaner cleaner 38005 172836 0 0 3 0x14200 reaper reaper 68141 50345 0 0 3 0x14200 pgdaemon pagedaemon 7909 164641 0 0 3 0x14200 bored crynlk 58221 284580 0 0 3 0x14200 bored crypto 11777 277909 0 0 3 0x40014200 acpi0 acpi0 47628 328771 0 0 3 0x40014200 idle1 2282 174595 0 0 3 0x14200 bored softnet 94904 72592 0 0 3 0x14200 bored systqmp 62630 140348 0 0 3 0x14200 bored systq 69732 320413 0 0 3 0x40014200 bored softclock 70771 150468 0 0 3 0x40014200 idle0 1 412116 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper