kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace lf_findoverlap(2d6ad77c0ff856c2,0,ffffff00726db0c8,ffff8000042dfbe0,128) 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(7f34bf0d9d0c11a8,ffffff0072540690,6,2,ffffff0067c9cb80) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(51cd01a9221b7d73,830,ffff8000210732d8) at sys_flock+0x163 syscall(4b7703e9ad6d0ecc) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(4b7703e9ad6d0ecc) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,f8d33a00010) at Xsyscall+0x128 end of kernel end trace frame: 0xf8ffe047890, count: -6 ddb{0}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff812e35d5 lf_findoverlap+0x95 rbp 0xffff8000211673e0 rbx 0xdeaf4152deaf4152 rdx 0xffff8000042e0000 rcx 0x20c rax 0xffff8000042e0000 r8 0xffff800021167418 r9 0 r10 0x743078bbe71977e6 r11 0xf7ca6d55b8dbaf08 r12 0x2 r13 0xffffff00726db0c8 r14 0xffff800021167418 r15 0 rip 0xffffffff812e35fb lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021167380 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor1) pid=366301 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800021072270,0xffff800021072730 process=0xffff800021075708 user=0xffff800021162000, vmspace=0xffffff0065971e78 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40912 57187 12773 65534 3 0x90 nanosleep syz-executor0 40912 458255 12773 65534 3 0x4000090 netcon2 syz-executor0 40912 336819 12773 65534 3 0x4000090 fsleep syz-executor0 4002 150335 12215 65534 2 0x10 syz-executor1 * 4002 366301 12215 65534 7 0x4000010 syz-executor1 4002 437402 12215 65534 2 0x4000090 syz-executor1 4002 71521 12215 65534 2 0x4000010 syz-executor1 4002 519114 12215 65534 7 0x4000090 syz-executor1 12215 93969 83082 65534 3 0x90 nanosleep syz-executor1 83082 472882 7039 0 3 0x82 wait syz-executor1 12773 205184 10473 65534 3 0x90 nanosleep syz-executor0 10473 338576 7039 0 3 0x82 wait syz-executor0 28235 454271 0 0 3 0x14200 bored sosplice 7039 333832 33075 0 3 0x82 thrsleep syz-fuzzer 7039 284224 33075 0 3 0x4000082 thrsleep syz-fuzzer 7039 149321 33075 0 3 0x4000082 thrsleep syz-fuzzer 7039 134031 33075 0 3 0x4000082 thrsleep syz-fuzzer 7039 116541 33075 0 3 0x4000082 thrsleep syz-fuzzer 7039 264854 33075 0 3 0x4000082 thrsleep syz-fuzzer 7039 58229 33075 0 3 0x4000082 thrsleep syz-fuzzer 7039 25594 33075 0 3 0x4000082 thrsleep syz-fuzzer 7039 97296 33075 0 3 0x4000082 kqread syz-fuzzer 7039 265022 33075 0 3 0x4000082 thrsleep syz-fuzzer 33075 284714 14062 0 3 0x10008a pause ksh 14062 309422 32306 0 3 0x92 select sshd 12770 497012 1 0 3 0x100083 ttyin getty 32306 373423 1 0 3 0x80 select sshd 40595 131107 90081 73 3 0x100090 kqread syslogd 90081 61523 1 0 3 0x100082 netio syslogd 57279 477790 1 77 3 0x100090 poll dhclient 39584 236775 1 0 3 0x80 poll dhclient 2155 279419 0 0 3 0x14200 pgzero zerothread 32787 104510 0 0 3 0x14200 aiodoned aiodoned 2361 229902 0 0 3 0x14200 syncer update 31561 429541 0 0 3 0x14200 cleaner cleaner 96211 240696 0 0 3 0x14200 reaper reaper 26226 87688 0 0 3 0x14200 pgdaemon pagedaemon 92364 408570 0 0 3 0x14200 bored crynlk 85480 437066 0 0 3 0x14200 bored crypto 26179 30743 0 0 3 0x40014200 acpi0 acpi0 53057 53078 0 0 3 0x40014200 idle1 19796 267513 0 0 3 0x14200 bored softnet 74195 124912 0 0 3 0x14200 bored systqmp 40062 33037 0 0 3 0x14200 bored systq 32119 14044 0 0 3 0x40014200 bored softclock 46875 479807 0 0 3 0x40014200 idle0 1 52225 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper