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(f5f0e56359c3acdf,0,ffffff00724bd4e0,ffff80000173f260,128) 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(7cfc5ad26ab75e52,ffffff00721ac100,5,3,ffffff0065f370a0) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(b66f7c32919faf80,830,ffff8000210624c8) at sys_flock+0x163 syscall(f00afc9e6929328) at syscall+0x496 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(f00afc9e6929328) at syscall+0x496 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,ddc1298a010) at Xsyscall+0x128 end of kernel end trace frame: 0xdde913187f0, count: -6 ddb{1}> show registers rdi 0xdeaf4152deaf4152 rsi 0xffffffff8151cf25 lf_findoverlap+0x95 rbp 0xffff80002115dca0 rbx 0xdeaf4152deaf4152 rdx 0xffff80000093f000 rcx 0x429 rax 0xffff80000093f000 r8 0xffff80002115dce8 r9 0x1 r10 0xf2ec98330aac232d r11 0x5b25ea5a4cf29606 r12 0x2 r13 0xffffff00724bd4e0 r14 0xffff80002115dce8 r15 0 rip 0xffffffff8151cf4b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002115dc40 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=131547 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800021063c38,0xffff800021062028 process=0xffff800021064d30 user=0xffff800021158000, vmspace=0xffffff00654a3e78 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28243 299202 97699 32767 2 0x10 syz-executor0 28243 469531 97699 32767 3 0x4000090 ttyout syz-executor0 28243 108040 97699 32767 2 0x4000010 syz-executor0 64941 164296 32984 32767 2 0x10 syz-executor1 *64941 131547 32984 32767 7 0x4000010 syz-executor1 64941 425103 32984 32767 7 0x4000010 syz-executor1 64941 267764 32984 32767 2 0x4000010 syz-executor1 32984 248731 80871 32767 3 0x90 nanosleep syz-executor1 80871 73476 23570 0 3 0x82 wait syz-executor1 97699 323063 48746 32767 3 0x90 nanosleep syz-executor0 48746 309672 23570 0 3 0x82 wait syz-executor0 69863 171245 0 0 3 0x14200 bored sosplice 23570 54402 25813 0 3 0x82 thrsleep syz-fuzzer 23570 324672 25813 0 3 0x4000082 nanosleep syz-fuzzer 23570 500167 25813 0 3 0x4000082 thrsleep syz-fuzzer 23570 320377 25813 0 3 0x4000082 thrsleep syz-fuzzer 23570 256076 25813 0 3 0x4000082 thrsleep syz-fuzzer 23570 150619 25813 0 3 0x4000082 thrsleep syz-fuzzer 23570 222523 25813 0 3 0x4000082 thrsleep syz-fuzzer 23570 392723 25813 0 3 0x4000082 thrsleep syz-fuzzer 23570 208975 25813 0 3 0x4000082 kqread syz-fuzzer 23570 401542 25813 0 3 0x4000082 thrsleep syz-fuzzer 25813 432844 24737 0 3 0x10008a pause ksh 24737 296472 20806 0 3 0x92 select sshd 50170 50031 1 0 3 0x100083 ttyin getty 20806 22321 1 0 3 0x80 select sshd 61525 398045 69934 73 3 0x100090 kqread syslogd 69934 155261 1 0 3 0x100082 netio syslogd 49862 41696 1 77 3 0x100090 poll dhclient 19038 401481 1 0 3 0x80 poll dhclient 65249 265953 0 0 2 0x14200 zerothread 25480 338437 0 0 3 0x14200 aiodoned aiodoned 58660 386034 0 0 3 0x14200 syncer update 66451 279342 0 0 3 0x14200 cleaner cleaner 49544 439931 0 0 3 0x14200 reaper reaper 50360 199231 0 0 3 0x14200 pgdaemon pagedaemon 36058 51701 0 0 3 0x14200 bored crynlk 15278 158668 0 0 3 0x14200 bored crypto 15990 201467 0 0 3 0x40014200 acpi0 acpi0 4969 325811 0 0 3 0x40014200 idle1 96116 471678 0 0 3 0x14200 bored softnet 38793 189391 0 0 3 0x14200 bored systqmp 16279 257793 0 0 3 0x14200 bored systq 92952 218143 0 0 3 0x40014200 bored softclock 66547 22266 0 0 3 0x40014200 idle0 1 283760 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper