kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xab: 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(0,ffffff007a07e301,ffff8000018d7c60,ffffff00717d4a88,0) at lf_findoverlap+0xab sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xad lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xad sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(ffffff0063ae14b8,5,3,ffffff007a07e308,ffffff006e9279f8) at VOP_ADVLOCK+0x67 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210a39e0,0) at sys_flock+0x156 syscall(0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,9c2d3fb0010) at Xsyscall+0x128 end of kernel end trace frame: 0x9c577c5bb80, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff81950b15 lf_findoverlap+0x85 rbp 0xffff800021194eb0 rbx 0xdeaf4152deaf4152 rdx 0xffff8000042df000 rcx 0xd14 rax 0xffff8000042df000 r8 0xffff800021194ef0 r9 0x1 r10 0x22842d22381a9991 r11 0xffffffff81540a80 pvclock_get_timecount r12 0x2 r13 0xffffff00717d4a88 r14 0xffff800021194ef0 r15 0 rip 0xffffffff81950b3b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021194e60 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=82468 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=71, nice=20 forw=0xffffffffffffffff, list=0xffff8000210a32d8,0xffff8000210a2be0 process=0xffff8000210b6668 user=0xffff800021190000, vmspace=0xffffff0065c09740 estcpu=21, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56596 219592 79972 65534 3 0x90 nanosleep syz-executor0 56596 362845 79972 65534 3 0x4000090 fsleep syz-executor0 56596 117309 79972 65534 3 0x4000090 fsleep syz-executor0 39760 102697 77389 65534 2 0x10 syz-executor1 *39760 82468 77389 65534 7 0x4000010 syz-executor1 39760 48418 77389 65534 7 0x4000010 syz-executor1 39760 18497 77389 65534 2 0x4000010 syz-executor1 79972 204424 51412 65534 3 0x90 nanosleep syz-executor0 51412 398447 92564 0 3 0x82 wait syz-executor0 77389 403014 20820 65534 3 0x90 nanosleep syz-executor1 20820 71707 92564 0 3 0x82 wait syz-executor1 2434 230348 0 0 3 0x14200 bored sosplice 92564 459183 9216 0 3 0x82 thrsleep syz-fuzzer 92564 481577 9216 0 3 0x4000082 thrsleep syz-fuzzer 92564 98512 9216 0 3 0x4000082 thrsleep syz-fuzzer 92564 322003 9216 0 3 0x4000082 thrsleep syz-fuzzer 92564 22052 9216 0 3 0x4000082 thrsleep syz-fuzzer 92564 426846 9216 0 3 0x4000082 thrsleep syz-fuzzer 92564 320584 9216 0 3 0x4000082 thrsleep syz-fuzzer 92564 449593 9216 0 3 0x4000082 thrsleep syz-fuzzer 92564 332743 9216 0 3 0x4000082 kqread syz-fuzzer 92564 41969 9216 0 3 0x4000082 thrsleep syz-fuzzer 9216 219354 13772 0 3 0x10008a pause ksh 13772 460573 19920 0 3 0x92 select sshd 78155 234204 1 0 3 0x100083 ttyin getty 19920 218958 1 0 3 0x80 select sshd 8861 316625 8 73 3 0x100090 kqread syslogd 8 339897 1 0 3 0x100082 netio syslogd 88263 265251 1 77 3 0x100090 poll dhclient 15878 283928 1 0 3 0x80 poll dhclient 43514 150231 0 0 3 0x14200 pgzero zerothread 78465 321469 0 0 3 0x14200 aiodoned aiodoned 11906 76542 0 0 3 0x14200 syncer update 96613 346223 0 0 3 0x14200 cleaner cleaner 37064 131568 0 0 3 0x14200 reaper reaper 8667 508682 0 0 3 0x14200 pgdaemon pagedaemon 14999 401505 0 0 3 0x14200 bored crynlk 71564 317145 0 0 3 0x14200 bored crypto 33983 454470 0 0 3 0x40014200 acpi0 acpi0 43288 220342 0 0 3 0x40014200 idle1 58474 448194 0 0 3 0x14200 bored softnet 35809 99638 0 0 3 0x14200 bored systqmp 4840 260526 0 0 3 0x14200 bored systq 37583 189612 0 0 3 0x40014200 bored softclock 23820 53933 0 0 3 0x40014200 idle0 1 340311 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper