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(40af541cc60a30ea,0,ffffff00655c2e70,ffff8000018d84e0,128) 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(b115911df5a43d66,ffffff0071dc3718,5,2,ffffff0069d830c8) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(1598534b22d82796,830,ffff800021054260) at sys_flock+0x163 syscall(2aec92cf9bcf8cac) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(2aec92cf9bcf8cac) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,9b899551010) at Xsyscall+0x128 end of kernel end trace frame: 0x9bb8256a280, count: -6 ddb{1}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff8143f825 lf_findoverlap+0x95 rbp 0xffff800021143080 rbx 0xdeadbeefdeadbeef rdx 0xffff8000022d9000 rcx 0x22b rax 0xffff8000022d9000 r8 0xffff8000211430b8 r9 0x1 r10 0x3e1a2748d00ca467 r11 0x113f0c564b90f5d7 r12 0x2 r13 0xffffff00655c2e70 r14 0xffff8000211430b8 r15 0 rip 0xffffffff8143f84b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021143020 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor0) pid=112444 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff800021054008,0xffff8000210544c8 process=0xffff8000210aa9f0 user=0xffff80002113e000, vmspace=0xffffff0065997008 estcpu=23, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38734 457167 15581 65534 2 0x10 syz-executor0 *38734 112444 15581 65534 7 0x4000010 syz-executor0 38734 435157 15581 65534 3 0x4000090 fsleep syz-executor0 38734 160937 15581 65534 3 0x4000090 fsleep syz-executor0 38734 466886 15581 65534 2 0x4000010 syz-executor0 35933 71499 12858 65534 2 0x10 syz-executor1 35933 276403 12858 65534 3 0x4000090 ttyin syz-executor1 35933 224013 12858 65534 2 0x4000010 syz-executor1 35933 130414 12858 65534 3 0x4000090 fsleep syz-executor1 35933 76474 12858 65534 7 0x4000010 syz-executor1 15581 259986 18754 65534 3 0x90 nanosleep syz-executor0 18754 207008 27102 0 3 0x82 wait syz-executor0 12858 22405 89503 65534 3 0x90 nanosleep syz-executor1 89503 408420 27102 0 3 0x82 wait syz-executor1 4154 84611 0 0 3 0x14200 bored sosplice 27102 477882 14936 0 3 0x82 thrsleep syz-fuzzer 27102 358098 14936 0 3 0x4000082 thrsleep syz-fuzzer 27102 101671 14936 0 3 0x4000082 thrsleep syz-fuzzer 27102 280812 14936 0 3 0x4000082 thrsleep syz-fuzzer 27102 377581 14936 0 3 0x4000082 thrsleep syz-fuzzer 27102 297335 14936 0 3 0x4000082 thrsleep syz-fuzzer 27102 22069 14936 0 3 0x4000082 thrsleep syz-fuzzer 27102 338275 14936 0 3 0x4000082 thrsleep syz-fuzzer 27102 75836 14936 0 3 0x4000082 kqread syz-fuzzer 27102 485447 14936 0 3 0x4000082 thrsleep syz-fuzzer 14936 144573 75257 0 3 0x10008a pause ksh 75257 11491 81285 0 3 0x92 select sshd 38 66472 1 0 3 0x100083 ttyin getty 81285 63190 1 0 3 0x80 select sshd 16789 95122 42277 73 3 0x100090 kqread syslogd 42277 284210 1 0 3 0x100082 netio syslogd 78868 124708 1 77 3 0x100090 poll dhclient 73209 85108 1 0 3 0x80 poll dhclient 78731 253804 0 0 2 0x14200 zerothread 18143 353847 0 0 3 0x14200 aiodoned aiodoned 83599 204538 0 0 3 0x14200 syncer update 17506 210215 0 0 3 0x14200 cleaner cleaner 17282 445411 0 0 3 0x14200 reaper reaper 2787 82405 0 0 3 0x14200 pgdaemon pagedaemon 17527 405420 0 0 3 0x14200 bored crynlk 95233 128826 0 0 3 0x14200 bored crypto 77472 117271 0 0 3 0x40014200 acpi0 acpi0 67908 125529 0 0 3 0x40014200 idle1 37313 111962 0 0 3 0x14200 bored softnet 19192 269013 0 0 3 0x14200 bored systqmp 99444 459475 0 0 3 0x14200 bored systq 52810 317715 0 0 3 0x40014200 bored softclock 5329 5558 0 0 3 0x40014200 idle0 1 203879 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper