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(c8960f973840b72,0,ffffff00690fc018,ffff8000040dd3e0,128) 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(9c83deaad41a7d98,ffffff0069a42628,5,3,ffffff0069c6baa0) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(7524601a551da827,830,ffff800021072978) at sys_flock+0x163 syscall(5b1f1443ab865c23) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(5b1f1443ab865c23) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,4747b278010) at Xsyscall+0x128 end of kernel end trace frame: 0x476c54d14d0, count: -6 ddb{1}> show registers rdi 0xdeafbeaddeafbead rsi 0xffffffff8143f825 lf_findoverlap+0x95 rbp 0xffff80002118ef60 rbx 0xdeafbeaddeafbead rdx 0xffff8000022d9000 rcx 0x3fc rax 0xffff8000022d9000 r8 0xffff80002118ef98 r9 0x1 r10 0x15117ad68b02cd71 r11 0x755210db25b28231 r12 0x2 r13 0xffffff00690fc018 r14 0xffff80002118ef98 r15 0 rip 0xffffffff8143f84b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002118ef00 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=380034 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff800021072e28,0xffff800021072028 process=0xffff800021075708 user=0xffff80002118a000, vmspace=0xffffff00658ff320 estcpu=23, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59353 258312 34510 65534 2 0x10 syz-executor1 *59353 380034 34510 65534 7 0x4000010 syz-executor1 59353 391401 34510 65534 7 0x4000010 syz-executor1 59353 379206 34510 65534 2 0x4000010 syz-executor1 73503 383415 11510 65534 3 0x90 nanosleep syz-executor0 73503 301703 11510 65534 3 0x4000090 pipewr syz-executor0 73503 519228 11510 65534 3 0x4000090 fsleep syz-executor0 73503 193824 11510 65534 3 0x4000090 fsleep syz-executor0 34510 99655 59695 65534 3 0x90 nanosleep syz-executor1 59695 120038 56188 0 3 0x82 wait syz-executor1 11510 378452 73518 65534 3 0x90 nanosleep syz-executor0 73518 36562 56188 0 3 0x82 wait syz-executor0 99535 412388 0 0 3 0x14200 bored sosplice 56188 33635 96989 0 3 0x82 kqread syz-fuzzer 56188 516240 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 88283 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 276526 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 165013 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 516331 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 502180 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 242732 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 53132 96989 0 3 0x4000082 thrsleep syz-fuzzer 56188 383250 96989 0 3 0x4000082 thrsleep syz-fuzzer 96989 445018 48538 0 3 0x10008a pause ksh 48538 41855 51908 0 3 0x92 select sshd 54199 252318 1 0 3 0x100083 ttyin getty 51908 242545 1 0 3 0x80 select sshd 71501 43189 84522 73 3 0x100090 kqread syslogd 84522 382303 1 0 3 0x100082 netio syslogd 8344 127872 1 77 3 0x100090 poll dhclient 68191 258960 1 0 3 0x80 poll dhclient 78284 182449 0 0 3 0x14200 pgzero zerothread 61024 278652 0 0 3 0x14200 aiodoned aiodoned 55021 420553 0 0 3 0x14200 syncer update 34385 301493 0 0 3 0x14200 cleaner cleaner 14115 340505 0 0 3 0x14200 reaper reaper 36790 488242 0 0 3 0x14200 pgdaemon pagedaemon 76626 174954 0 0 3 0x14200 bored crynlk 6570 161052 0 0 3 0x14200 bored crypto 99257 66938 0 0 3 0x40014200 acpi0 acpi0 81190 106641 0 0 3 0x40014200 idle1 48955 422857 0 0 3 0x14200 bored softnet 68520 92887 0 0 3 0x14200 bored systqmp 17918 519114 0 0 3 0x14200 bored systq 64523 212104 0 0 3 0x40014200 bored softclock 16361 256342 0 0 3 0x40014200 idle0 1 426944 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper