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(6e718281c913b8c8,0,ffffff006fedacd0,ffff800003edeee0,128) 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(28ee4c14b642ebf1,ffffff00765b6168,5,3,ffffff006996c6f0) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(60127ae1d6dc7d55,830,ffff800021062bd0) at sys_flock+0x163 syscall(822b4b793c8273f) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(822b4b793c8273f) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,72b2153d010) at Xsyscall+0x128 end of kernel end trace frame: 0x72d916f3680, count: -6 ddb{1}> show registers rdi 0xdead4110dead4110 rsi 0xffffffff8137d455 lf_findoverlap+0x95 rbp 0xffff800021191c60 rbx 0xdead4110dead4110 rdx 0xffff800003edf000 rcx 0x337 rax 0xffff800003edf000 r8 0xffff800021191c98 r9 0x1 r10 0xd5c862d51826dbac r11 0x58804b796443ce62 r12 0x2 r13 0xffffff006fedacd0 r14 0xffff800021191c98 r15 0 rip 0xffffffff8137d47b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021191c00 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=326790 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800021062720,0xffff800021062280 process=0xffff800021065078 user=0xffff80002118c000, vmspace=0xffffff0065877c68 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 76822 366971 25400 65534 2 0x10 syz-executor1 *76822 326790 25400 65534 7 0x4000010 syz-executor1 76822 503862 25400 65534 7 0x4000010 syz-executor1 76822 509501 25400 65534 2 0x4000010 syz-executor1 60168 298609 5768 65534 3 0x90 nanosleep syz-executor0 5768 440439 2547 0 3 0x82 wait syz-executor0 25400 30488 11276 65534 3 0x90 nanosleep syz-executor1 11276 305095 2547 0 3 0x82 wait syz-executor1 94986 179709 0 0 3 0x14200 bored sosplice 2547 378129 74850 0 3 0x82 thrsleep syz-fuzzer 2547 24992 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 405370 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 189647 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 279808 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 305003 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 203888 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 459743 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 336317 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 446529 74850 0 3 0x4000082 thrsleep syz-fuzzer 2547 159157 74850 0 3 0x4000082 kqread syz-fuzzer 74850 51708 69226 0 3 0x10008a pause ksh 69226 114275 68268 0 3 0x92 select sshd 12010 156868 1 0 3 0x100083 ttyin getty 68268 177209 1 0 3 0x80 select sshd 45833 389151 38588 73 3 0x100090 kqread syslogd 38588 231974 1 0 3 0x100082 netio syslogd 1882 403088 1 77 3 0x100090 poll dhclient 47208 419861 1 0 3 0x80 poll dhclient 11624 293597 0 0 3 0x14200 pgzero zerothread 98605 216479 0 0 3 0x14200 aiodoned aiodoned 32728 161953 0 0 3 0x14200 syncer update 18722 472111 0 0 3 0x14200 cleaner cleaner 31866 124543 0 0 3 0x14200 reaper reaper 57716 509091 0 0 3 0x14200 pgdaemon pagedaemon 2400 516062 0 0 3 0x14200 bored crynlk 74727 407202 0 0 3 0x14200 bored crypto 75532 175687 0 0 3 0x40014200 acpi0 acpi0 9128 399986 0 0 3 0x40014200 idle1 74658 481650 0 0 3 0x14200 bored softnet 94428 449647 0 0 3 0x14200 bored systqmp 70489 524011 0 0 3 0x14200 bored systq 19226 189615 0 0 3 0x40014200 bored softclock 33697 150370 0 0 3 0x40014200 idle0 1 302088 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper