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(6ba977d0eac6b030,0,ffffff007ce50df0,ffff800000ad3960,124) 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(2b7de3c26c61f665,ffffff00742bce98,5,1,ffffff0007c6fc50) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(e9ae1eda299c3edc,830,ffff80002108b080) at sys_flock+0x163 syscall(85b5d48d4801f4e9) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(85b5d48d4801f4e9) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,1a077f86010) at Xsyscall+0x128 end of kernel end trace frame: 0x1a27de18800, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff81a01fb5 lf_findoverlap+0x95 rbp 0xffff80002118b870 rbx 0xdeaf4152deaf4152 rdx 0xffff800002adc000 rcx 0x1aa rax 0xffff800002adc000 r8 0xffff80002118b8a8 r9 0x1 r10 0xb3d8feaf4de06d4b r11 0x2bd2b23f6eb3db54 r12 0x2 r13 0xffffff007ce50df0 r14 0xffff80002118b8a8 r15 0 rip 0xffffffff81a01fdb lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002118b810 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=18849 stat=onproc flags process=0 proc=4000000 pri=36, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff80002108abd0,0xffff80002108ae38 process=0xffff8000210653c0 user=0xffff800021186000, vmspace=0xffffff007f124d68 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99093 141145 24601 0 7 0 syz-executor1 *99093 18849 24601 0 7 0x4000000 syz-executor1 99093 481443 24601 0 3 0x4000080 fsleep syz-executor1 84237 175756 32777 0 2 0 syz-executor0 84237 34538 32777 0 3 0x4000080 ttyout syz-executor0 84237 292367 32777 0 3 0x4000080 ttyout syz-executor0 84237 463926 32777 0 3 0x4000080 ttyout syz-executor0 84237 411213 32777 0 2 0x4000000 syz-executor0 39171 308643 1 0 3 0x100083 ttyin getty 12412 171675 0 0 3 0x14200 bored sosplice 24601 135886 3569 0 3 0x82 nanosleep syz-executor1 32777 374597 3569 0 3 0x82 nanosleep syz-executor0 3569 180523 59435 0 3 0x82 thrsleep syz-fuzzer 3569 320819 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 502726 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 441169 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 192045 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 406116 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 521668 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 179144 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 179147 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 461816 59435 0 3 0x4000082 kqread syz-fuzzer 3569 90226 59435 0 3 0x4000082 thrsleep syz-fuzzer 3569 309595 59435 0 3 0x4000082 thrsleep syz-fuzzer 59435 104346 51350 0 3 0x10008a pause ksh 51350 55552 57350 0 3 0x92 select sshd 57350 318730 1 0 3 0x80 select sshd 41198 73903 88026 73 3 0x100090 kqread syslogd 88026 157431 1 0 3 0x100082 netio syslogd 83682 202401 1 77 3 0x100090 poll dhclient 19672 98077 1 0 3 0x80 poll dhclient 10498 110087 0 0 2 0x14200 zerothread 68016 420819 0 0 3 0x14200 aiodoned aiodoned 40706 377611 0 0 3 0x14200 syncer update 79761 143559 0 0 3 0x14200 cleaner cleaner 71446 316061 0 0 3 0x14200 reaper reaper 12801 341417 0 0 3 0x14200 pgdaemon pagedaemon 85658 337225 0 0 3 0x14200 bored crynlk 27857 178960 0 0 3 0x14200 bored crypto 22932 36408 0 0 3 0x40014200 acpi0 acpi0 49851 162511 0 0 3 0x40014200 idle1 19883 221008 0 0 3 0x14200 bored softnet 90532 146327 0 0 3 0x14200 bored systqmp 62637 445097 0 0 3 0x14200 bored systq 51403 485972 0 0 3 0x40014200 bored softclock 96222 122679 0 0 3 0x40014200 idle0 1 254237 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper