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(b000f8302b75d7eb,0,ffffff00752e5c08,ffff800000ad5da0,128) 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(dbaf7425bcd78d78,ffffff0069c9f788,5,3,ffffff0066f9a3a8) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(acb4df2fa40c2c5a,830,ffff80002108ae28) at sys_flock+0x163 syscall(53f97b08a22e852d) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(53f97b08a22e852d) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,8de712ee010) at Xsyscall+0x128 end of kernel end trace frame: 0x8e0c251a230, count: -6 ddb{0}> show registers rdi 0xdeafbeaddeafbead rsi 0xffffffff810eaa15 lf_findoverlap+0x95 rbp 0xffff800021172fc0 rbx 0xdeafbeaddeafbead rdx 0xffff8000020db000 rcx 0x362 rax 0xffff8000020db000 r8 0xffff800021172ff8 r9 0 r10 0x5098022135398155 r11 0x6eb3b9f7507c51d8 r12 0x2 r13 0xffffff00752e5c08 r14 0xffff800021172ff8 r15 0 rip 0xffffffff810eaa3b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021172f60 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor1) pid=133060 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff80002108b788,0xffff80002108abe0 process=0xffff800021064358 user=0xffff80002116e000, vmspace=0xffffff0065868848 estcpu=22, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47543 229344 47737 65534 2 0x10 syz-executor1 *47543 133060 47737 65534 7 0x4000010 syz-executor1 47543 316933 47737 65534 7 0x4000010 syz-executor1 47543 487345 47737 65534 2 0x4000010 syz-executor1 13347 18606 85985 65534 3 0x90 nanosleep syz-executor0 85985 104094 13243 0 3 0x82 wait syz-executor0 47737 73106 95666 65534 3 0x90 nanosleep syz-executor1 95666 458621 13243 0 3 0x82 wait syz-executor1 11361 466788 0 0 3 0x14200 bored sosplice 13243 85224 10725 0 3 0x82 thrsleep syz-fuzzer 13243 179575 10725 0 3 0x4000082 thrsleep syz-fuzzer 13243 50392 10725 0 3 0x4000082 thrsleep syz-fuzzer 13243 89473 10725 0 3 0x4000082 kqread syz-fuzzer 13243 4793 10725 0 3 0x4000082 thrsleep syz-fuzzer 13243 163260 10725 0 3 0x4000082 thrsleep syz-fuzzer 13243 417437 10725 0 3 0x4000082 thrsleep syz-fuzzer 13243 484995 10725 0 3 0x4000082 thrsleep syz-fuzzer 13243 67458 10725 0 3 0x4000082 thrsleep syz-fuzzer 13243 182357 10725 0 3 0x4000082 thrsleep syz-fuzzer 10725 45960 89691 0 3 0x10008a pause ksh 89691 293817 43335 0 3 0x92 select sshd 40815 458354 1 0 3 0x100083 ttyin getty 43335 407360 1 0 3 0x80 select sshd 9673 448514 50675 73 3 0x100090 kqread syslogd 50675 174858 1 0 3 0x100082 netio syslogd 82932 523535 1 77 3 0x100090 poll dhclient 11224 474000 1 0 3 0x80 poll dhclient 59985 452056 0 0 3 0x14200 pgzero zerothread 18849 474365 0 0 3 0x14200 aiodoned aiodoned 16552 495326 0 0 3 0x14200 syncer update 23175 464171 0 0 3 0x14200 cleaner cleaner 42143 152893 0 0 3 0x14200 reaper reaper 57410 180372 0 0 3 0x14200 pgdaemon pagedaemon 2598 204520 0 0 3 0x14200 bored crynlk 1852 56909 0 0 3 0x14200 bored crypto 3619 319817 0 0 3 0x40014200 acpi0 acpi0 33712 370246 0 0 3 0x40014200 idle1 56787 122948 0 0 3 0x14200 bored softnet 32180 475357 0 0 3 0x14200 bored systqmp 69874 419820 0 0 3 0x14200 bored systq 79200 243064 0 0 3 0x40014200 bored softclock 1159 299868 0 0 3 0x40014200 idle0 1 211009 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper