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(532073ff0ec04e82,0,ffffff00703a7260,ffff8000016d93e0,128) 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(915414a62690435e,ffffff0066030d28,8,2,ffffff0065574b50) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(f8978cbd7ef5434f,830,ffff800021045778) at sys_flock+0x163 syscall(f44c92935c4b71e9) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(f44c92935c4b71e9) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,ea76e0351a0) at Xsyscall+0x128 end of kernel end trace frame: 0xea9c8eb3100, count: -6 ddb{0}> show registers rdi 0xdeafbeaddeafbead rsi 0xffffffff81bed205 lf_findoverlap+0x95 rbp 0xffff80002118ced0 rbx 0xdeafbeaddeafbead rdx 0xffff8000010d9000 rcx 0xb1b rax 0xffff8000010d9000 r8 0xffff80002118cf08 r9 0 r10 0xbc902959670b7a5e r11 0x22ee416fd6029e84 r12 0x2 r13 0xffffff00703a7260 r14 0xffff80002118cf08 r15 0 rip 0xffffffff81bed22b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002118ce70 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor0) pid=369495 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800021062018,0xffff800021044978 process=0xffff800021065078 user=0xffff800021188000, vmspace=0xffffff00699d5d78 estcpu=31, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88012 374526 78292 65534 2 0x10 syz-executor0 88012 215748 78292 65534 3 0x4000090 lockf syz-executor0 88012 498062 78292 65534 7 0x4000010 syz-executor0 *88012 369495 78292 65534 7 0x4000010 syz-executor0 88012 66574 78292 65534 2 0x4000010 syz-executor0 88720 250805 2767 65534 3 0x90 piperd syz-executor1 2767 48044 36242 0 3 0x82 wait syz-executor1 78292 201596 9055 65534 3 0x90 nanosleep syz-executor0 9055 309630 36242 0 3 0x82 wait syz-executor0 81332 258326 0 0 3 0x14200 bored sosplice 36242 410408 92409 0 3 0x82 thrsleep syz-fuzzer 36242 10848 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 114974 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 245761 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 369683 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 245099 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 142010 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 142050 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 102160 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 448344 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 74392 92409 0 3 0x4000082 thrsleep syz-fuzzer 36242 285717 92409 0 3 0x4000082 kqread syz-fuzzer 92409 74646 94838 0 3 0x10008a pause ksh 94838 272513 84743 0 3 0x92 select sshd 30902 10281 1 0 3 0x100083 ttyin getty 84743 505207 1 0 3 0x80 select sshd 71841 189773 10908 73 3 0x100090 kqread syslogd 10908 351623 1 0 3 0x100082 netio syslogd 19615 271793 1 77 3 0x100090 poll dhclient 86518 13138 1 0 3 0x80 poll dhclient 86866 311100 0 0 3 0x14200 pgzero zerothread 19479 517190 0 0 3 0x14200 aiodoned aiodoned 71894 206093 0 0 3 0x14200 syncer update 65929 214592 0 0 3 0x14200 cleaner cleaner 74176 340538 0 0 3 0x14200 reaper reaper 31281 192511 0 0 3 0x14200 pgdaemon pagedaemon 98652 286398 0 0 3 0x14200 bored crynlk 34067 261336 0 0 3 0x14200 bored crypto 26813 207414 0 0 3 0x40014200 acpi0 acpi0 68003 98599 0 0 3 0x40014200 idle1 56967 110417 0 0 3 0x14200 bored softnet 46183 512883 0 0 3 0x14200 bored systqmp 64630 521696 0 0 3 0x14200 bored systq 30180 149411 0 0 3 0x40014200 bored softclock 26951 399786 0 0 3 0x40014200 idle0 1 211643 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper