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,ffffff0065a92201,ffff8000018d71a0,ffffff007be42de8,0) 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(ffffff007c2fe6a8,5,3,ffffff0065a92240,ffffff006e918850) at VOP_ADVLOCK+0x67 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a2018,0) 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,0,2,9a7ba4a7010) at Xsyscall+0x128 end of kernel end trace frame: 0x9aa5f5c6460, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff815f7ca5 lf_findoverlap+0x85 rbp 0xffff80002115f310 rbx 0xdeaf4152deaf4152 rdx 0xffff8000042dd000 rcx 0x19e rax 0xffff8000042dd000 r8 0xffff80002115f350 r9 0x1 r10 0xff098530540d2dca r11 0xffffffff8178b9c0 pvclock_get_timecount r12 0x2 r13 0xffffff007be42de8 r14 0xffff80002115f350 r15 0 rip 0xffffffff815f7ccb lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002115f2c0 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=379238 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a3c38,0xffff8000210a2be0 process=0xffff8000210b6018 user=0xffff80002115a000, vmspace=0xffffff0065c75a58 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26258 1769 79004 65534 2 0x10 syz-executor1 *26258 379238 79004 65534 7 0x4000010 syz-executor1 26258 52514 79004 65534 2 0x4000010 syz-executor1 26258 416525 79004 65534 7 0x4000090 syz-executor1 62428 449728 53616 65534 3 0x90 nanosleep syz-executor0 62428 348825 53616 65534 3 0x4000090 fsleep syz-executor0 62428 119455 53616 65534 3 0x4000090 fsleep syz-executor0 53616 227269 51820 65534 3 0x90 nanosleep syz-executor0 51820 483614 44956 0 3 0x82 wait syz-executor0 79004 144285 1690 65534 3 0x90 nanosleep syz-executor1 1690 514184 44956 0 3 0x82 wait syz-executor1 61512 90180 0 0 3 0x14200 bored sosplice 44956 342622 36457 0 3 0x82 thrsleep syz-fuzzer 44956 61428 36457 0 3 0x4000082 thrsleep syz-fuzzer 44956 460657 36457 0 3 0x4000082 thrsleep syz-fuzzer 44956 2827 36457 0 3 0x4000082 thrsleep syz-fuzzer 44956 115090 36457 0 3 0x4000082 thrsleep syz-fuzzer 44956 488676 36457 0 3 0x4000082 thrsleep syz-fuzzer 44956 160993 36457 0 3 0x4000082 kqread syz-fuzzer 44956 408700 36457 0 3 0x4000082 thrsleep syz-fuzzer 44956 392644 36457 0 3 0x4000082 thrsleep syz-fuzzer 44956 66344 36457 0 3 0x4000082 thrsleep syz-fuzzer 36457 384871 97881 0 3 0x10008a pause ksh 97881 128348 22488 0 3 0x92 select sshd 56464 253223 1 0 3 0x100083 ttyin getty 22488 195962 1 0 3 0x80 select sshd 71150 330840 41586 73 3 0x100090 kqread syslogd 41586 120530 1 0 3 0x100082 netio syslogd 10128 466612 1 77 3 0x100090 poll dhclient 82637 142569 1 0 3 0x80 poll dhclient 13431 90046 0 0 3 0x14200 pgzero zerothread 62241 53752 0 0 3 0x14200 aiodoned aiodoned 18936 204094 0 0 3 0x14200 syncer update 47343 421124 0 0 3 0x14200 cleaner cleaner 71828 328915 0 0 3 0x14200 reaper reaper 54874 278005 0 0 3 0x14200 pgdaemon pagedaemon 99800 320306 0 0 3 0x14200 bored crynlk 83949 347546 0 0 3 0x14200 bored crypto 34681 7702 0 0 3 0x40014200 acpi0 acpi0 91268 493413 0 0 3 0x40014200 idle1 14000 23641 0 0 3 0x14200 bored softnet 77830 516416 0 0 3 0x14200 bored systqmp 76584 522944 0 0 3 0x14200 bored systq 85575 470006 0 0 3 0x40014200 bored softclock 82071 398105 0 0 3 0x40014200 idle0 1 21450 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper