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,ffffff007eaaaf08,ffff8000040dc1a0,128,0) 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(ffffff006714cda8,6,2,ffffff0067b3b4d8,ffffff007f7c6000) at VOP_ADVLOCK+0x61 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a2270,0) 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,0,2,1048fcaa0d8) at Xsyscall+0x128 end of kernel end trace frame: 0x10710f5a5f0, count: -6 ddb{1}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff813c1445 lf_findoverlap+0x85 rbp 0xffff8000211b12a0 rbx 0xdeadbeefdeadbeef rdx 0xffff8000010d7000 rcx 0xdb1 rax 0xffff8000010d7000 r8 0xffff8000211b12e0 r9 0x1 r10 0x735f59cc2197549 r11 0xffff8000210a2978 r12 0x2 r13 0xffffff007eaaaf08 r14 0xffff8000211b12e0 r15 0 rip 0xffffffff813c146b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211b1250 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=259948 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=69, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a2018,0xffff8000210a3798 process=0xffff8000210b72d8 user=0xffff8000211ac000, vmspace=0xffffff006597fb60 estcpu=19, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67189 240977 30247 65534 2 0x10 syz-executor0 67189 195425 30247 65534 7 0x4000090 syz-executor0 *67189 259948 30247 65534 7 0x4000010 syz-executor0 67189 326735 30247 65534 2 0x4000010 syz-executor0 67189 221818 30247 65534 2 0x4000010 syz-executor0 30247 53704 18433 65534 3 0x90 nanosleep syz-executor0 18433 232401 71145 0 3 0x82 wait syz-executor0 15513 253470 23804 65534 3 0x90 piperd syz-executor1 23804 209081 71145 0 3 0x82 wait syz-executor1 23184 290799 0 0 3 0x14200 bored sosplice 71145 42154 53110 0 3 0x82 thrsleep syz-fuzzer 71145 376306 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 355978 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 143403 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 386533 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 155587 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 294854 53110 0 3 0x4000082 kqread syz-fuzzer 71145 143672 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 174030 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 60096 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 23823 53110 0 3 0x4000082 thrsleep syz-fuzzer 71145 68215 53110 0 3 0x4000082 thrsleep syz-fuzzer 53110 510498 96298 0 3 0x10008a pause ksh 96298 390335 54008 0 3 0x92 select sshd 22948 490844 1 0 3 0x100083 ttyin getty 54008 476438 1 0 3 0x80 select sshd 91474 56995 47668 73 3 0x100090 kqread syslogd 47668 267251 1 0 3 0x100082 netio syslogd 37713 311496 1 77 3 0x100090 poll dhclient 48829 159884 1 0 3 0x80 poll dhclient 41467 157159 0 0 3 0x14200 pgzero zerothread 81305 481178 0 0 3 0x14200 aiodoned aiodoned 97269 313515 0 0 3 0x14200 syncer update 13234 128897 0 0 3 0x14200 cleaner cleaner 8059 118468 0 0 3 0x14200 reaper reaper 2405 335304 0 0 3 0x14200 pgdaemon pagedaemon 17603 425203 0 0 3 0x14200 bored crynlk 34574 48099 0 0 3 0x14200 bored crypto 88299 470550 0 0 3 0x40014200 acpi0 acpi0 17235 476632 0 0 3 0x40014200 idle1 72971 285246 0 0 3 0x14200 bored softnet 98288 208818 0 0 3 0x14200 bored systqmp 86617 378105 0 0 3 0x14200 bored systq 25994 306456 0 0 3 0x40014200 bored softclock 90001 129434 0 0 3 0x40014200 idle0 1 52465 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper