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(fd73d8ad121b80bf,0,ffffff007ec24368,ffff8000016d9120,128) 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(fd030e2312c4131a,ffffff00681159e8,6,2,ffffff00637c8728) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(91534ee92f9f7df2,830,ffff80002108b080) at sys_flock+0x163 syscall(f4627730bfa09bb8) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(f4627730bfa09bb8) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,3d8b831a010) at Xsyscall+0x128 end of kernel end trace frame: 0x3db716340c0, count: -6 ddb{1}> show registers rdi 0xdeafbeaddeafbead rsi 0xffffffff8138c4d5 lf_findoverlap+0x95 rbp 0xffff80002115b880 rbx 0xdeafbeaddeafbead rdx 0xffff8000030e0000 rcx 0x1aa rax 0xffff8000030e0000 r8 0xffff80002115b8b8 r9 0x1 r10 0x526f9e0d2607a699 r11 0xbd2a5cc14ed81ef2 r12 0x2 r13 0xffffff007ec24368 r14 0xffff80002115b8b8 r15 0 rip 0xffffffff8138c4fb lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002115b820 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=310592 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002108a720,0xffff80002108b798 process=0xffff80002109b3c8 user=0xffff800021156000, vmspace=0xffffff00658cdd70 estcpu=31, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77549 476863 66067 65534 3 0x90 nanosleep syz-executor0 77549 163121 66067 65534 3 0x4000090 kqread syz-executor0 77549 440921 66067 65534 3 0x4000090 fsleep syz-executor0 44939 180236 38344 65534 2 0x10 syz-executor1 *44939 310592 38344 65534 7 0x4000010 syz-executor1 44939 204540 38344 65534 2 0x4000010 syz-executor1 44939 270393 38344 65534 7 0x4000090 syz-executor1 66067 309330 1875 65534 3 0x90 nanosleep syz-executor0 1875 223398 85641 0 3 0x82 wait syz-executor0 38344 254685 2429 65534 3 0x90 nanosleep syz-executor1 2429 209866 85641 0 3 0x82 wait syz-executor1 18081 274120 0 0 3 0x14200 bored sosplice 85641 70327 99325 0 3 0x82 thrsleep syz-fuzzer 85641 109491 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 330243 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 475781 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 120146 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 340881 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 124881 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 22575 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 455041 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 340128 99325 0 3 0x4000082 thrsleep syz-fuzzer 85641 242997 99325 0 3 0x4000082 kqread syz-fuzzer 99325 367920 56715 0 3 0x10008a pause ksh 56715 123056 89068 0 3 0x92 select sshd 51588 32985 1 0 3 0x100083 ttyin getty 89068 78245 1 0 3 0x80 select sshd 60374 207999 74189 73 3 0x100090 kqread syslogd 74189 476443 1 0 3 0x100082 netio syslogd 52654 319721 1 77 3 0x100090 poll dhclient 73921 60925 1 0 3 0x80 poll dhclient 31024 523295 0 0 2 0x14200 zerothread 78509 112310 0 0 3 0x14200 aiodoned aiodoned 7053 426311 0 0 3 0x14200 syncer update 54255 499189 0 0 3 0x14200 cleaner cleaner 71569 471379 0 0 3 0x14200 reaper reaper 37532 430058 0 0 3 0x14200 pgdaemon pagedaemon 52609 373336 0 0 3 0x14200 bored crynlk 24884 139840 0 0 3 0x14200 bored crypto 11715 158977 0 0 3 0x40014200 acpi0 acpi0 1888 141677 0 0 3 0x40014200 idle1 69599 514160 0 0 3 0x14200 bored softnet 27932 29482 0 0 3 0x14200 bored systqmp 23985 139903 0 0 3 0x14200 bored systq 66914 485777 0 0 3 0x40014200 bored softclock 74823 87872 0 0 3 0x40014200 idle0 1 289960 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper