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(d85553aef364fa56,0,ffffff0007b2cf18,ffff8000019e3f20,20) 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(d43e233b35776a10,ffffff006e58bda0,ffff800020fe3530,0,ffffff006287f8c0) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(b97a90f93a3b64ed,0,ffff800020fe3530) at sys_flock+0x1c8 syscall(4853362826d8d45e) at syscall+0x5a0 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(4853362826d8d45e) at syscall+0x5a0 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,915b92ba010) at Xsyscall+0x128 end of kernel end trace frame: 0x917bbdf52a0, count: -6 ddb{0}> show registers rdi 0xffffffff81979d65 lf_findoverlap+0xc5 rsi 0xcb8 rbp 0xffff8000210f6d10 rbx 0xffffff0007b2cf18 rdx 0xcb9 rcx 0xffff800002c05000 rax 0xffff800002c05000 r8 0xffff8000210f6d58 r9 0 r10 0x586f6d41039a2e0 r11 0x2bc1dcc4b4c01218 r12 0x2 r13 0 r14 0xffff8000210f6d58 r15 0xdeaf4152deaf4152 rip 0xffffffff81979d8a lf_findoverlap+0xea cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000210f6cb0 ss 0x10 lf_findoverlap+0xea: movq 0x18(%r15),%rax ddb{0}> show proc PROC (syz-executor0) pid=313146 stat=onproc flags process=0 proc=4000000 pri=40, usrpri=60, nice=20 forw=0xffffffffffffffff, list=0xffff800020fe32d8,0xffff800020fe2988 process=0xffff80002101ad38 user=0xffff8000210f2000, vmspace=0xffffff007f00c000 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7036 227828 57728 0 2 0 syz-executor0 * 7036 313146 57728 0 7 0x4000000 syz-executor0 7036 312178 57728 0 2 0x4000000 syz-executor0 98161 509660 8625 0 2 0 syz-executor1 98161 219216 8625 0 7 0x4000000 syz-executor1 98161 480000 8625 0 3 0x4000080 fsleep syz-executor1 57728 484225 12536 0 3 0x82 nanosleep syz-executor0 8625 70111 12536 0 3 0x82 nanosleep syz-executor1 79260 245932 1 0 3 0x100083 ttyin getty 59016 1341 0 0 3 0x14200 bored sosplice 12536 291667 98015 0 3 0x82 thrsleep syz-fuzzer 12536 409400 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 518315 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 217051 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 47190 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 518919 98015 0 3 0x4000082 kqread syz-fuzzer 12536 296734 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 168642 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 93375 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 516615 98015 0 3 0x4000082 thrsleep syz-fuzzer 12536 362203 98015 0 3 0x4000082 thrsleep syz-fuzzer 98015 200934 1578 0 3 0x10008a pause ksh 1578 467150 19945 0 3 0x92 select sshd 19945 379385 1 0 3 0x80 select sshd 24801 253989 31449 73 3 0x100090 kqread syslogd 31449 372051 1 0 3 0x100082 netio syslogd 41463 132588 1 77 3 0x100090 poll dhclient 82249 138567 1 0 3 0x80 poll dhclient 53249 67926 0 0 2 0x14200 zerothread 62814 243445 0 0 3 0x14200 aiodoned aiodoned 58241 13317 0 0 3 0x14200 syncer update 22343 89362 0 0 3 0x14200 cleaner cleaner 94546 413326 0 0 3 0x14200 reaper reaper 31311 156593 0 0 3 0x14200 pgdaemon pagedaemon 3105 74097 0 0 3 0x14200 bored crynlk 92036 330127 0 0 3 0x14200 bored crypto 39448 404057 0 0 3 0x40014200 acpi0 acpi0 29372 170091 0 0 3 0x40014200 idle1 88001 524203 0 0 3 0x14200 bored softnet 78396 225903 0 0 3 0x14200 bored systqmp 14430 84219 0 0 3 0x14200 bored systq 78033 290292 0 0 3 0x40014200 bored softclock 77254 156458 0 0 3 0x40014200 idle0 1 461855 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper