kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xab: 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(0,ffffff0067db4600,ffff8000016d7460,128,0) 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(ffffff0063d43810,5,2,ffffff007a6e10a8,ffffff007f7c6b98) at VOP_ADVLOCK+0x61 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210d8018,0) 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,be6b1ccb010) at Xsyscall+0x128 end of kernel end trace frame: 0xbe95dd2d380, count: -6 ddb{0}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff81905445 lf_findoverlap+0x85 rbp 0xffff800021177100 rbx 0xdeaf4152deaf4152 rdx 0xffff8000010d7000 rcx 0xfc rax 0xffff8000010d7000 r8 0xffff800021177140 r9 0 r10 0x2ef171e5c3889eef r11 0xffff8000210d99e0 r12 0x2 r13 0xffffff0067db4600 r14 0xffff800021177140 r15 0 rip 0xffffffff8190546b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211770b0 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor1) pid=426524 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000210d8720,0xffff8000210d99f0 process=0xffff8000210a4d30 user=0xffff800021172000, vmspace=0xffffff0064994738 estcpu=23, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1613 73381 48814 65534 2 0x10 syz-executor1 * 1613 426524 48814 65534 7 0x4000010 syz-executor1 1613 488086 48814 65534 2 0x4000010 syz-executor1 1613 339150 48814 65534 7 0x4000090 syz-executor1 2755 223816 48878 65534 3 0x90 piperd syz-executor0 48878 308541 53941 0 3 0x82 wait syz-executor0 48814 109172 13722 65534 3 0x90 nanosleep syz-executor1 13722 73561 53941 0 3 0x82 wait syz-executor1 74086 355916 0 0 3 0x14200 bored sosplice 53941 213886 26974 0 3 0x82 kqread syz-fuzzer 53941 201240 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 167440 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 96737 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 399387 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 208457 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 197892 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 304856 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 407695 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 308318 26974 0 3 0x4000082 thrsleep syz-fuzzer 53941 178452 26974 0 3 0x4000082 thrsleep syz-fuzzer 26974 387960 86566 0 3 0x10008a pause ksh 86566 407642 36790 0 3 0x92 select sshd 37550 406753 1 0 3 0x100083 ttyin getty 36790 375840 1 0 3 0x80 select sshd 18584 117842 19543 73 3 0x100090 kqread syslogd 19543 264198 1 0 3 0x100082 netio syslogd 86693 399785 1 77 3 0x100090 poll dhclient 85240 322865 1 0 3 0x80 poll dhclient 21216 4703 0 0 3 0x14200 pgzero zerothread 40153 122802 0 0 3 0x14200 aiodoned aiodoned 74604 406507 0 0 3 0x14200 syncer update 14402 171562 0 0 3 0x14200 cleaner cleaner 33045 279690 0 0 3 0x14200 reaper reaper 73142 135875 0 0 3 0x14200 pgdaemon pagedaemon 11310 79757 0 0 3 0x14200 bored crynlk 65094 413837 0 0 3 0x14200 bored crypto 19065 179047 0 0 3 0x40014200 acpi0 acpi0 63817 403493 0 0 3 0x40014200 idle1 81024 212470 0 0 3 0x14200 bored softnet 58003 264807 0 0 3 0x14200 bored systqmp 64779 59322 0 0 3 0x14200 bored systq 28266 99827 0 0 3 0x40014200 bored softclock 37331 49043 0 0 3 0x40014200 idle0 1 373112 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper