kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xea: movq 0x18(%r15),%rax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace lf_findoverlap(7be16204a69c8c23,0,fffffd80699701f0,ffff8000015427e0,20) at lf_findoverlap+0xea sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xdc lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xdc sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(b765d676f11e2ecc,fffffd807c765180,ffff800020fe24c8,0,fffffd80631ee3c0) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(c1354f9eeec0722b,10,ffff800020fe24c8) at sys_flock+0x1c8 syscall(a026f74ee281567) at syscall+0x5a0 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(a026f74ee281567) at syscall+0x5a0 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,aca9f093010) at Xsyscall+0x128 end of kernel end trace frame: 0xacd351b0c40, count: -6 ddb{0}> show registers rdi 0xffffffff8181dbb5 lf_findoverlap+0xc5 rsi 0x15c rbp 0xffff800021091610 rbx 0xfffffd80699701f0 rdx 0x15d rcx 0xffff800001342000 rax 0xffff800001342000 r8 0xffff800021091658 r9 0 r10 0x8bc3685784c79184 r11 0x841e9dfb271d471f r12 0x2 r13 0 r14 0xffff800021091658 r15 0xdead4110dead4110 rip 0xffffffff8181dbda lf_findoverlap+0xea cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000210915b0 ss 0x10 lf_findoverlap+0xea: movq 0x18(%r15),%rax ddb{0}> show proc PROC (syz-executor1) pid=232435 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020fe32d8,0xffff800020fe2988 process=0xffff80002101b710 user=0xffff80002108c000, vmspace=0xfffffd8065667a58 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52292 299682 32073 32767 2 0x10 syz-executor1 *52292 232435 32073 32767 7 0x4000010 syz-executor1 52292 227595 32073 32767 2 0x4000010 syz-executor1 52292 193249 32073 32767 7 0x4000090 syz-executor1 32073 224675 77689 32767 2 0x490 syz-executor1 77689 210291 47744 0 3 0x82 wait syz-executor1 22522 443867 63087 32767 2 0x490 syz-executor0 63087 472260 47744 0 3 0x82 wait syz-executor0 53393 303083 0 0 3 0x14200 bored sosplice 47744 388580 19250 0 3 0x82 thrsleep syz-fuzzer 47744 169183 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 448435 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 463559 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 73323 19250 0 3 0x4000082 kqread syz-fuzzer 47744 286477 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 54251 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 424047 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 269632 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 522404 19250 0 3 0x4000082 thrsleep syz-fuzzer 47744 275010 19250 0 3 0x4000082 thrsleep syz-fuzzer 19250 452725 53103 0 3 0x10008a pause ksh 53103 225436 2681 0 3 0x92 select sshd 15667 200222 1 0 3 0x100083 ttyin getty 2681 327664 1 0 3 0x80 select sshd 21913 78989 19635 73 3 0x100090 kqread syslogd 19635 442736 1 0 3 0x100082 netio syslogd 88056 99875 1 77 3 0x100090 poll dhclient 41613 422766 1 0 3 0x80 poll dhclient 47374 404759 0 0 3 0x14200 pgzero zerothread 86156 40721 0 0 3 0x14200 aiodoned aiodoned 99957 356185 0 0 3 0x14200 syncer update 1877 439331 0 0 3 0x14200 cleaner cleaner 65457 510614 0 0 3 0x14200 reaper reaper 72883 189535 0 0 3 0x14200 pgdaemon pagedaemon 7874 324948 0 0 3 0x14200 bored crynlk 40695 391797 0 0 3 0x14200 bored crypto 84264 164716 0 0 3 0x40014200 acpi0 acpi0 48062 123268 0 0 3 0x40014200 idle1 24149 232487 0 0 3 0x14200 bored softnet 6986 12982 0 0 3 0x14200 bored systqmp 8612 63554 0 0 3 0x14200 bored systq 77735 503883 0 0 3 0x40014200 bored softclock 71674 369809 0 0 3 0x40014200 idle0 1 518745 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper