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(44502446ad5576a9,0,ffffff0064f679d0,ffff800000ad5920,128) 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(7772ae0203f5a1be,ffffff007e1b7c30,5,2,ffffff0068141c90) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(672ae63d5cc25e54,830,ffff8000210624c8) at sys_flock+0x163 syscall(abb45a11ff1388c9) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(abb45a11ff1388c9) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,47da8fa9010) at Xsyscall+0x128 end of kernel end trace frame: 0x480981b8520, count: -6 ddb{0}> show registers rdi 0xdeafbeaddeafbead rsi 0xffffffff8101e095 lf_findoverlap+0x95 rbp 0xffff80002112ee30 rbx 0xdeafbeaddeafbead rdx 0xffff8000022da000 rcx 0x44b rax 0xffff8000022da000 r8 0xffff80002112ee68 r9 0 r10 0x4b0807c69c49aaa1 r11 0xbbafdbb92c54a4e5 r12 0x2 r13 0xffffff0064f679d0 r14 0xffff80002112ee68 r15 0 rip 0xffffffff8101e0bb lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002112edd0 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor0) pid=36068 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800021063530,0xffff800021063090 process=0xffff80002109ad38 user=0xffff80002112a000, vmspace=0xffffff007f123420 estcpu=31, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15341 301456 95719 65534 2 0x10 syz-executor1 15341 251499 95719 65534 7 0x4000010 syz-executor1 80801 282624 53925 65534 2 0x10 syz-executor0 *80801 36068 53925 65534 7 0x4000010 syz-executor0 80801 33764 53925 65534 3 0x4000090 fsleep syz-executor0 80801 120847 53925 65534 2 0x4000010 syz-executor0 53925 241834 85241 65534 3 0x90 nanosleep syz-executor0 85241 13514 77859 0 3 0x82 wait syz-executor0 95719 243653 96207 65534 3 0x90 nanosleep syz-executor1 96207 516259 77859 0 3 0x82 wait syz-executor1 48254 119244 0 0 3 0x14200 bored sosplice 77859 281414 23838 0 3 0x82 thrsleep syz-fuzzer 77859 268047 23838 0 3 0x4000082 nanosleep syz-fuzzer 77859 179627 23838 0 3 0x4000082 thrsleep syz-fuzzer 77859 297237 23838 0 3 0x4000082 thrsleep syz-fuzzer 77859 176670 23838 0 3 0x4000082 thrsleep syz-fuzzer 77859 458737 23838 0 3 0x4000082 thrsleep syz-fuzzer 77859 236416 23838 0 3 0x4000082 thrsleep syz-fuzzer 77859 427924 23838 0 3 0x4000082 kqread syz-fuzzer 77859 282397 23838 0 3 0x4000082 thrsleep syz-fuzzer 77859 246383 23838 0 3 0x4000082 thrsleep syz-fuzzer 23838 491643 76662 0 3 0x10008a pause ksh 76662 58174 88957 0 3 0x92 select sshd 79050 25571 1 0 3 0x100083 ttyin getty 88957 388313 1 0 3 0x80 select sshd 85131 373234 15671 73 3 0x100090 kqread syslogd 15671 224327 1 0 3 0x100082 netio syslogd 87097 208378 1 77 3 0x100090 poll dhclient 94458 333302 1 0 3 0x80 poll dhclient 2889 38288 0 0 2 0x14200 zerothread 52344 342349 0 0 3 0x14200 aiodoned aiodoned 36301 26841 0 0 3 0x14200 syncer update 47428 232783 0 0 3 0x14200 cleaner cleaner 52342 71129 0 0 3 0x14200 reaper reaper 64257 50032 0 0 3 0x14200 pgdaemon pagedaemon 57628 471382 0 0 3 0x14200 bored crynlk 48461 232484 0 0 3 0x14200 bored crypto 74524 260458 0 0 3 0x40014200 acpi0 acpi0 65812 279699 0 0 3 0x40014200 idle1 59055 5268 0 0 3 0x14200 bored softnet 33598 294005 0 0 3 0x14200 bored systqmp 682 375063 0 0 3 0x14200 bored systq 98098 284104 0 0 3 0x40014200 bored softclock 18810 489432 0 0 3 0x40014200 idle0 1 321155 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper