kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xbb: 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(b1efecd0b63fd751,0,ffffff006969d028,ffff800003f42260,124) 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(a989f5eb3b2895b7,ffffff0069f787f8,8,1,ffffff0069cd9490) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(a989f5eb3bc26a32,830,ffff800021044260) at sys_flock+0x163 syscall(6ce19530d40aa170) at syscall+0x496 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(6ce19530d40aa170) at syscall+0x496 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,caab5f8f0d8) at Xsyscall+0x128 end of kernel end trace frame: 0xcad47093150, count: -6 ddb{1}> show registers rdi 0xdead4110dead4110 rsi 0xffffffff81b5d005 lf_findoverlap+0x95 rbp 0xffff8000211a7010 rbx 0xdead4110dead4110 rdx 0xffff80000193d000 rcx 0xeb6 rax 0xffff80000193d000 r8 0xffff8000211a7058 r9 0x1 r10 0x5ffd072483cb2a5 r11 0x4401d17b63658b6c r12 0x2 r13 0xffffff006969d028 r14 0xffff8000211a7058 r15 0 rip 0xffffffff81b5d02b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211a6fb0 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=242156 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=71, nice=20 forw=0xffffffffffffffff, list=0xffff800021063c38,0xffff8000210444c8 process=0xffff8000210653c0 user=0xffff8000211a2000, vmspace=0xffffff00659e0a58 estcpu=21, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7058 522401 96609 32767 2 0x10 syz-executor0 7058 192121 96609 32767 3 0x4000090 ttyout syz-executor0 7058 201980 96609 32767 3 0x4000090 fsleep syz-executor0 7058 380742 96609 32767 3 0x4000090 ttyout syz-executor0 7058 295308 96609 32767 7 0x4000010 syz-executor0 7058 24329 96609 32767 2 0x4000010 syz-executor0 98853 404125 66451 32767 2 0x10 syz-executor1 98853 373997 66451 32767 3 0x4000090 lockf syz-executor1 *98853 242156 66451 32767 7 0x4000010 syz-executor1 98853 12743 66451 32767 2 0x4000010 syz-executor1 98853 476177 66451 32767 2 0x4000010 syz-executor1 98853 64114 66451 32767 2 0x4000010 syz-executor1 96609 148309 60768 32767 3 0x90 nanosleep syz-executor0 60768 352881 64863 0 3 0x82 wait syz-executor0 66451 372154 23507 32767 3 0x90 nanosleep syz-executor1 23507 256936 64863 0 3 0x82 wait syz-executor1 34850 193487 0 0 3 0x14200 bored sosplice 64863 68069 97139 0 3 0x82 thrsleep syz-fuzzer 64863 244521 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 119688 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 463242 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 320318 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 487352 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 97049 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 78069 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 88154 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 114680 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 249266 97139 0 3 0x4000082 thrsleep syz-fuzzer 64863 381052 97139 0 3 0x4000082 kqread syz-fuzzer 97139 290878 48021 0 3 0x10008a pause ksh 48021 13916 47701 0 3 0x92 select sshd 36708 518668 1 0 3 0x100083 ttyin getty 47701 332024 1 0 3 0x80 select sshd 66060 490390 21017 73 3 0x100090 kqread syslogd 21017 132646 1 0 3 0x100082 netio syslogd 53527 17984 1 77 3 0x100090 poll dhclient 15019 131624 1 0 3 0x80 poll dhclient 7418 339247 0 0 2 0x14200 zerothread 40797 260374 0 0 3 0x14200 aiodoned aiodoned 5010 335120 0 0 3 0x14200 syncer update 66557 201085 0 0 3 0x14200 cleaner cleaner 82833 172233 0 0 3 0x14200 reaper reaper 11224 361650 0 0 3 0x14200 pgdaemon pagedaemon 73122 225981 0 0 3 0x14200 bored crynlk 32146 212192 0 0 3 0x14200 bored crypto 33125 1480 0 0 3 0x40014200 acpi0 acpi0 70332 241581 0 0 3 0x40014200 idle1 7216 504917 0 0 3 0x14200 bored softnet 47331 168160 0 0 3 0x14200 bored systqmp 41881 80481 0 0 3 0x14200 bored systq 12344 239699 0 0 3 0x40014200 bored softclock 7954 359729 0 0 3 0x40014200 idle0 1 229131 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper