kernel: protection fault trap, code=0 Stopped at lf_findoverlap+0xbb: 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(fef34bdac131d5a7,0,ffffff0079d5b7e8,ffff8000019baa20,128) 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(af3f4ae6e9602c29,ffffff0067f94e20,5,2,ffffff006595d6c0) at VOP_ADVLOCK+0x74 sys/kern/vfs_vops.c:699 sys_flock(9a824339ee5fb874,830,ffff800021062978) at sys_flock+0x163 syscall(38df7248819ea38f) at syscall+0x496 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(38df7248819ea38f) at syscall+0x496 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,f5cc439e010) at Xsyscall+0x128 end of kernel end trace frame: 0xf5ef0e66c40, count: -6 ddb{0}> show registers rdi 0xdead4110dead4110 rsi 0xffffffff81bc42c5 lf_findoverlap+0x95 rbp 0xffff8000211591f0 rbx 0xdead4110dead4110 rdx 0xffff80000293e000 rcx 0x140e __ALIGN_SIZE+0x40e rax 0xffff80000293e000 r8 0xffff800021159238 r9 0 r10 0xfab0bd380e5778b6 r11 0x35598c6dd8e51871 r12 0x2 r13 0xffffff0079d5b7e8 r14 0xffff800021159238 r15 0 rip 0xffffffff81bc42eb lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021159190 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{0}> show proc PROC (syz-executor1) pid=194650 stat=onproc flags process=0 proc=4000000 pri=40, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff800021063080,0xffff8000210632e8 process=0xffff800021065708 user=0xffff800021154000, vmspace=0xffffff007f124d68 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34799 12923 95019 0 2 0 syz-executor1 *34799 194650 95019 0 7 0x4000000 syz-executor1 34799 481680 95019 0 3 0x4000080 lockf syz-executor1 34799 506977 95019 0 2 0x4000000 syz-executor1 62640 326452 97346 0 2 0 syz-executor0 62640 141916 97346 0 3 0x4000080 ttyout syz-executor0 62640 174863 97346 0 3 0x4000080 ttyout syz-executor0 62640 80471 97346 0 3 0x4000080 ttyout syz-executor0 62640 291762 97346 0 7 0x4000000 syz-executor0 59498 296726 0 0 3 0x14200 bored sosplice 95019 500036 65184 0 3 0x82 nanosleep syz-executor1 97346 416313 65184 0 3 0x82 nanosleep syz-executor0 65184 275846 48854 0 3 0x82 thrsleep syz-fuzzer 65184 505136 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 48004 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 443745 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 50953 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 310260 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 120699 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 36277 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 506498 48854 0 3 0x4000082 thrsleep syz-fuzzer 65184 291953 48854 0 3 0x4000082 kqread syz-fuzzer 65184 166795 48854 0 3 0x4000082 thrsleep syz-fuzzer 48854 221499 7399 0 3 0x10008a pause ksh 7399 508780 33191 0 3 0x92 select sshd 23788 206246 1 0 3 0x100083 ttyin getty 33191 63344 1 0 3 0x80 select sshd 77439 419332 90863 73 3 0x100090 kqread syslogd 90863 204229 1 0 3 0x100082 netio syslogd 30960 217107 1 77 3 0x100090 poll dhclient 9434 10964 1 0 3 0x80 poll dhclient 26340 418875 0 0 2 0x14200 zerothread 55180 202515 0 0 3 0x14200 aiodoned aiodoned 13825 482040 0 0 3 0x14200 syncer update 82869 129205 0 0 3 0x14200 cleaner cleaner 26998 172667 0 0 3 0x14200 reaper reaper 39999 324974 0 0 3 0x14200 pgdaemon pagedaemon 82000 352073 0 0 3 0x14200 bored crynlk 79107 493553 0 0 3 0x14200 bored crypto 60452 76273 0 0 3 0x40014200 acpi0 acpi0 36926 156713 0 0 3 0x40014200 idle1 67090 316229 0 0 3 0x14200 bored softnet 45177 136984 0 0 3 0x14200 bored systqmp 31688 402263 0 0 3 0x14200 bored systq 32230 427840 0 0 3 0x40014200 bored softclock 44200 97239 0 0 3 0x40014200 idle0 1 443458 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper