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,ffffff0066f46a20,ffff8000044dc360,128,0) 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(ffffff0066f9df00,5,2,ffffff0069bbd268,ffffff007f7c6d40) at VOP_ADVLOCK+0x61 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a2bd0,0) 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,fcaf7dcb0d8) at Xsyscall+0x128 end of kernel end trace frame: 0xfcded050f20, count: -6 ddb{1}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff81b2d0b5 lf_findoverlap+0x85 rbp 0xffff8000211e1220 rbx 0xdeadbeefdeadbeef rdx 0xffff8000028d9000 rcx 0x132c __ALIGN_SIZE+0x32c rax 0xffff8000028d9000 r8 0xffff8000211e1260 r9 0x1 r10 0xa7f799e0ba624e38 r11 0xffff8000210a32d8 r12 0x2 r13 0xffffff0066f46a20 r14 0xffff8000211e1260 r15 0 rip 0xffffffff81b2d0db lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211e11d0 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=173212 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a3c38,0xffff8000210a2280 process=0xffff8000210b6658 user=0xffff8000211dc000, vmspace=0xffffff006595b740 estcpu=26, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 36104 325145 74356 65534 2 0x10 syz-executor1 36104 43556 74356 65534 7 0x4000090 syz-executor1 *36104 173212 74356 65534 7 0x4000010 syz-executor1 36104 401297 74356 65534 2 0x4000090 syz-executor1 36104 91870 74356 65534 2 0x4000010 syz-executor1 36104 370269 74356 65534 2 0x4000010 syz-executor1 4927 483900 21260 65534 3 0x90 piperd syz-executor0 21260 456886 45679 0 3 0x82 wait syz-executor0 74356 114473 81391 65534 3 0x90 nanosleep syz-executor1 81391 140849 45679 0 3 0x82 wait syz-executor1 47664 199434 0 0 3 0x14200 bored sosplice 45679 487227 56058 0 3 0x82 thrsleep syz-fuzzer 45679 256943 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 249809 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 301751 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 244623 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 24051 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 503453 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 143789 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 57863 56058 0 3 0x4000082 kqread syz-fuzzer 45679 77743 56058 0 3 0x4000082 thrsleep syz-fuzzer 45679 152087 56058 0 3 0x4000082 thrsleep syz-fuzzer 56058 254442 14749 0 3 0x10008a pause ksh 14749 190273 6405 0 3 0x92 select sshd 99170 275894 1 0 3 0x100083 ttyin getty 6405 425645 1 0 3 0x80 select sshd 29037 461193 97566 73 3 0x100090 kqread syslogd 97566 310193 1 0 3 0x100082 netio syslogd 52012 276682 1 77 3 0x100090 poll dhclient 44156 493178 1 0 3 0x80 poll dhclient 23309 52354 0 0 3 0x14200 pgzero zerothread 8867 409160 0 0 3 0x14200 aiodoned aiodoned 41068 282825 0 0 3 0x14200 syncer update 22718 231839 0 0 3 0x14200 cleaner cleaner 36225 35255 0 0 3 0x14200 reaper reaper 41140 279928 0 0 3 0x14200 pgdaemon pagedaemon 15645 468162 0 0 3 0x14200 bored crynlk 9420 515894 0 0 3 0x14200 bored crypto 50191 253219 0 0 3 0x40014200 acpi0 acpi0 30252 461975 0 0 3 0x40014200 idle1 25866 353953 0 0 3 0x14200 bored softnet 47268 23659 0 0 3 0x14200 bored systqmp 37962 321158 0 0 3 0x14200 bored systq 69198 81521 0 0 3 0x40014200 bored softclock 53793 285125 0 0 3 0x40014200 idle0 1 451102 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper