kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xbb: 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(756d2620fc255d5e,0,ffffff007bcb2550,ffff8000042e4e60,128) at lf_findoverlap+0xbb sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xbc lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xbc sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(101f4564a9f8bc72,ffffff00729fb708,6,2,ffffff0066687238) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(ea4df8a8e669be22,830,ffff80002108b530) at sys_flock+0x163 syscall(fa7930e55dcd96a2) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(fa7930e55dcd96a2) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,f54009e7010) at Xsyscall+0x128 end of kernel end trace frame: 0xf565cc01a10, count: -6 ddb{1}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff8101e095 lf_findoverlap+0x95 rbp 0xffff800021199090 rbx 0xdeadbeefdeadbeef rdx 0xffff800000cd9000 rcx 0x276 rax 0xffff800000cd9000 r8 0xffff8000211990c8 r9 0x1 r10 0x996155c522102f2f r11 0x8a92d9df7d248f12 r12 0x2 r13 0xffffff007bcb2550 r14 0xffff8000211990c8 r15 0 rip 0xffffffff8101e0bb lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021199030 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=463842 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff80002108b080,0xffff80002108a028 process=0xffff80002109b3c8 user=0xffff800021194000, vmspace=0xffffff0069a5fa58 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95333 93989 66706 65534 2 0x10 syz-executor1 *95333 463842 66706 65534 7 0x4000010 syz-executor1 95333 212580 66706 65534 2 0x4000010 syz-executor1 95333 227509 66706 65534 7 0x4000090 syz-executor1 77219 243625 61079 65534 3 0x90 piperd syz-executor0 61079 307724 92011 0 3 0x82 wait syz-executor0 66706 202996 48619 65534 3 0x90 nanosleep syz-executor1 48619 387630 92011 0 3 0x82 wait syz-executor1 56146 33541 0 0 3 0x14200 bored sosplice 92011 286830 45420 0 3 0x82 thrsleep syz-fuzzer 92011 259116 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 378038 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 35001 45420 0 3 0x4000082 kqread syz-fuzzer 92011 5074 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 87480 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 224387 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 322810 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 359148 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 247747 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 358121 45420 0 3 0x4000082 thrsleep syz-fuzzer 92011 243076 45420 0 3 0x4000082 thrsleep syz-fuzzer 45420 443927 40720 0 3 0x10008a pause ksh 40720 147465 89108 0 3 0x92 select sshd 47530 425921 1 0 3 0x100083 ttyin getty 89108 416663 1 0 3 0x80 select sshd 84967 78266 39304 73 3 0x100090 kqread syslogd 39304 307202 1 0 3 0x100082 netio syslogd 51602 69733 1 77 3 0x100090 poll dhclient 64685 324673 1 0 3 0x80 poll dhclient 73426 254772 0 0 3 0x14200 pgzero zerothread 53861 61612 0 0 3 0x14200 aiodoned aiodoned 84531 169111 0 0 3 0x14200 syncer update 3348 379420 0 0 3 0x14200 cleaner cleaner 53032 74934 0 0 3 0x14200 reaper reaper 77650 210280 0 0 3 0x14200 pgdaemon pagedaemon 34478 52456 0 0 3 0x14200 bored crynlk 15043 202027 0 0 3 0x14200 bored crypto 31933 206240 0 0 3 0x40014200 acpi0 acpi0 67407 272786 0 0 3 0x40014200 idle1 11600 306323 0 0 3 0x14200 bored softnet 99439 180669 0 0 3 0x14200 bored systqmp 58111 489679 0 0 3 0x14200 bored systq 5819 393316 0 0 3 0x40014200 bored softclock 7592 255245 0 0 3 0x40014200 idle0 1 304035 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper