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(982a30ee36b7d843,0,ffffff007eb8f728,ffff8000018d9f20,124) 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(7a6fbd3c8cf3b8c3,ffffff006621aad0,5,1,ffffff0067a03358) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(92fdadbae76a5e9d,830,ffff80002108abd0) at sys_flock+0x163 syscall(6fc823e42059fd0c) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(6fc823e42059fd0c) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,1bfc56050d8) at Xsyscall+0x128 end of kernel end trace frame: 0x1c1e79ebe00, count: -6 ddb{0}> show registers rdi 0xdeafbeaddeafbead rsi 0xffffffff8101e095 lf_findoverlap+0x95 rbp 0xffff80002119b320 rbx 0xdeafbeaddeafbead rdx 0xffff800001ada000 rcx 0xc9a rax 0xffff800001ada000 r8 0xffff80002119b358 r9 0 r10 0xaca993be442e326 r11 0x67d5cf11b7b60a0f r12 0x2 r13 0xffffff007eb8f728 r14 0xffff80002119b358 r15 0 rip 0xffffffff8101e0bb lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002119b2c0 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor0) pid=196601 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff80002108b9e0,0xffff8000210452d8 process=0xffff80002109a360 user=0xffff800021196000, vmspace=0xffffff007ebbe638 estcpu=27, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69458 347755 89124 65534 2 0x10 syz-executor0 69458 218765 89124 65534 3 0x4000090 lockf syz-executor0 *69458 196601 89124 65534 7 0x4000010 syz-executor0 69458 371869 89124 65534 7 0x4000010 syz-executor0 69458 388189 89124 65534 2 0x4000010 syz-executor0 69111 217620 34991 65534 2 0x10 syz-executor1 34991 14284 53257 0 3 0x82 wait syz-executor1 89124 187363 89922 65534 3 0x90 nanosleep syz-executor0 89922 111093 53257 0 3 0x82 wait syz-executor0 73773 337320 0 0 3 0x14200 bored sosplice 53257 74099 61737 0 3 0x82 thrsleep syz-fuzzer 53257 520319 61737 0 3 0x4000082 nanosleep syz-fuzzer 53257 155341 61737 0 3 0x4000082 thrsleep syz-fuzzer 53257 217426 61737 0 3 0x4000082 nanosleep syz-fuzzer 53257 205586 61737 0 3 0x4000082 thrsleep syz-fuzzer 53257 57060 61737 0 3 0x4000082 thrsleep syz-fuzzer 53257 121269 61737 0 3 0x4000082 thrsleep syz-fuzzer 53257 88414 61737 0 3 0x4000082 kqread syz-fuzzer 53257 473434 61737 0 3 0x4000082 thrsleep syz-fuzzer 53257 502933 61737 0 3 0x4000082 thrsleep syz-fuzzer 53257 88228 61737 0 3 0x4000082 thrsleep syz-fuzzer 61737 69934 59219 0 3 0x10008a pause ksh 59219 180690 7835 0 3 0x92 select sshd 1527 6017 1 0 3 0x100083 ttyin getty 7835 313253 1 0 3 0x80 select sshd 21943 514143 29195 73 3 0x100090 kqread syslogd 29195 251346 1 0 3 0x100082 netio syslogd 28706 387936 1 77 3 0x100090 poll dhclient 88727 18070 1 0 3 0x80 poll dhclient 56902 415337 0 0 3 0x14200 pgzero zerothread 84801 18258 0 0 3 0x14200 aiodoned aiodoned 99505 198894 0 0 3 0x14200 syncer update 64490 10785 0 0 3 0x14200 cleaner cleaner 10031 469253 0 0 3 0x14200 reaper reaper 96327 343654 0 0 3 0x14200 pgdaemon pagedaemon 93802 380722 0 0 3 0x14200 bored crynlk 82757 455247 0 0 3 0x14200 bored crypto 49917 232979 0 0 3 0x40014200 acpi0 acpi0 76688 428735 0 0 3 0x40014200 idle1 77706 14031 0 0 3 0x14200 bored softnet 71303 222553 0 0 3 0x14200 bored systqmp 85725 56507 0 0 3 0x14200 bored systq 49431 354078 0 0 3 0x40014200 bored softclock 48876 403828 0 0 3 0x40014200 idle0 1 490130 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper