kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xab: 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(0,ffffff00660fcae0,ffff80000003c8e0,128,0) at lf_findoverlap+0xab sys/kern/vfs_lockf.c:621 lf_setlock() at lf_setlock+0xac lf_getblock sys/kern/vfs_lockf.c:586 [inline] lf_setlock() at lf_setlock+0xac sys/kern/vfs_lockf.c:314 VOP_ADVLOCK(ffffff0068f403c0,5,3,ffffff006759f468,ffffff007f7c6848) at VOP_ADVLOCK+0x61 sys/kern/vfs_vops.c:699 sys_flock(830,ffff8000210ca978,0) at sys_flock+0x156 syscall(0) at syscall+0x466 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(0) at syscall+0x466 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,bf9ebc22010) at Xsyscall+0x128 end of kernel end trace frame: 0xbfc1cbf4d40, count: -6 ddb{0}> show registers rdi 0xdeadbeefdeadbeef rsi 0xffffffff81905445 lf_findoverlap+0x85 rbp 0xffff80002118f170 rbx 0xdeadbeefdeadbeef rdx 0xffff8000044dd000 rcx 0x538 rax 0xffff8000044dd000 r8 0xffff80002118f1b0 r9 0 r10 0x1a56aa83968d853e r11 0xffff8000210ca270 r12 0x2 r13 0xffffff00660fcae0 r14 0xffff80002118f1b0 r15 0 rip 0xffffffff8190546b lf_findoverlap+0xab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002118f120 ss 0x10 lf_findoverlap+0xab: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor1) pid=255190 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000210ca018,0xffff8000210cb2e8 process=0xffff8000210a53c0 user=0xffff80002118a000, vmspace=0xffffff0061043538 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14462 212447 94717 65534 3 0x90 nanosleep syz-executor0 94717 252890 46465 0 3 0x82 wait syz-executor0 46672 317254 79150 65534 2 0x10 syz-executor1 *46672 255190 79150 65534 7 0x4000010 syz-executor1 46672 78970 79150 65534 7 0x4000010 syz-executor1 46672 91570 79150 65534 2 0x4000010 syz-executor1 79150 272720 48638 65534 3 0x90 nanosleep syz-executor1 48638 148183 46465 0 3 0x82 wait syz-executor1 88224 22896 0 0 3 0x14200 bored sosplice 46465 34022 16688 0 3 0x82 thrsleep syz-fuzzer 46465 309204 16688 0 3 0x4000082 thrsleep syz-fuzzer 46465 485614 16688 0 3 0x4000082 thrsleep syz-fuzzer 46465 439757 16688 0 3 0x4000082 thrsleep syz-fuzzer 46465 72108 16688 0 3 0x4000082 thrsleep syz-fuzzer 46465 445425 16688 0 3 0x4000082 thrsleep syz-fuzzer 46465 436653 16688 0 3 0x4000082 thrsleep syz-fuzzer 46465 293631 16688 0 3 0x4000082 thrsleep syz-fuzzer 46465 221054 16688 0 3 0x4000082 kqread syz-fuzzer 46465 40720 16688 0 3 0x4000082 thrsleep syz-fuzzer 16688 191383 76141 0 3 0x10008a pause ksh 76141 26273 30908 0 3 0x92 select sshd 46892 166845 1 0 3 0x100083 ttyin getty 30908 335386 1 0 3 0x80 select sshd 11433 513624 5845 73 3 0x100090 kqread syslogd 5845 502213 1 0 3 0x100082 netio syslogd 59467 274109 1 77 3 0x100090 poll dhclient 83048 305802 1 0 3 0x80 poll dhclient 164 338006 0 0 3 0x14200 pgzero zerothread 34685 302088 0 0 3 0x14200 aiodoned aiodoned 87936 387499 0 0 3 0x14200 syncer update 79576 402535 0 0 3 0x14200 cleaner cleaner 93848 58895 0 0 3 0x14200 reaper reaper 62636 303844 0 0 3 0x14200 pgdaemon pagedaemon 96719 87168 0 0 3 0x14200 bored crynlk 42401 11182 0 0 3 0x14200 bored crypto 79747 89864 0 0 3 0x40014200 acpi0 acpi0 54854 378884 0 0 3 0x40014200 idle1 66197 504869 0 0 3 0x14200 bored softnet 94508 91970 0 0 3 0x14200 bored systqmp 78176 291707 0 0 3 0x14200 bored systq 91259 418962 0 0 3 0x40014200 bored softclock 94716 248174 0 0 3 0x40014200 idle0 1 442617 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper