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(1cc7af0b5752b9a1,0,ffffff007c8db010,ffff8000042defe0,128) 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(e4a7c296174c8531,ffffff0066ddb8f8,8,2,ffffff006966a0c8) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699 sys_flock(bf61de283582e919,830,ffff800021044008) at sys_flock+0x163 syscall(ec6d0419d1e8b561) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ec6d0419d1e8b561) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583 Xsyscall(6,0,ffffffffffffff4f,0,2,dbf26e05268) at Xsyscall+0x128 end of kernel end trace frame: 0xdc133f25bf0, count: -6 ddb{1}> show registers rdi 0xdead4110dead4110 rsi 0xffffffff810eaa15 lf_findoverlap+0x95 rbp 0xffff8000211af9c0 rbx 0xdead4110dead4110 rdx 0xffff8000028da000 rcx 0x18d rax 0xffff8000028da000 r8 0xffff8000211af9f8 r9 0x1 r10 0xfaf561f8ab5c4f70 r11 0xf381ba3becbaf1c2 r12 0x2 r13 0xffffff007c8db010 r14 0xffff8000211af9f8 r15 0 rip 0xffffffff810eaa3b lf_findoverlap+0xbb cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000211af960 ss 0x10 lf_findoverlap+0xbb: movq 0x18(%rbx),%rax ddb{1}> show proc PROC (syz-executor1) pid=471578 stat=onproc flags process=10 proc=4000000 pri=40, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800021062270,0xffff800021044720 process=0xffff800021064010 user=0xffff8000211aa000, vmspace=0xffffff0065943e78 estcpu=33, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47912 109244 64583 65534 7 0x10 syz-executor0 47912 9232 64583 65534 2 0x4000090 syz-executor0 47912 443194 64583 65534 3 0x4000090 fsleep syz-executor0 48874 409895 74156 65534 2 0x10 syz-executor1 48874 474332 74156 65534 3 0x4000090 lockf syz-executor1 48874 239477 74156 65534 3 0x4000090 fsleep syz-executor1 48874 387731 74156 65534 2 0x4000010 syz-executor1 *48874 471578 74156 65534 7 0x4000010 syz-executor1 74156 134240 79419 65534 3 0x90 nanosleep syz-executor1 79419 345944 84835 0 3 0x82 wait syz-executor1 64583 493801 69342 65534 3 0x90 nanosleep syz-executor0 69342 44710 84835 0 3 0x82 wait syz-executor0 88183 41045 0 0 3 0x14200 bored sosplice 84835 437797 4151 0 3 0x82 thrsleep syz-fuzzer 84835 45751 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 468088 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 163903 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 11181 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 219100 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 410269 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 127643 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 120877 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 155070 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 59373 4151 0 3 0x4000082 thrsleep syz-fuzzer 84835 96386 4151 0 3 0x4000082 kqread syz-fuzzer 4151 352192 78850 0 3 0x10008a pause ksh 78850 159950 66207 0 3 0x92 select sshd 83123 437887 1 0 3 0x100083 ttyin getty 66207 3959 1 0 3 0x80 select sshd 80922 357863 55503 73 3 0x100090 kqread syslogd 55503 90603 1 0 3 0x100082 netio syslogd 93592 518044 1 77 3 0x100090 poll dhclient 10656 193340 1 0 3 0x80 poll dhclient 32045 455648 0 0 2 0x14200 zerothread 69966 230073 0 0 3 0x14200 aiodoned aiodoned 67071 161179 0 0 3 0x14200 syncer update 57732 407355 0 0 3 0x14200 cleaner cleaner 83387 453878 0 0 3 0x14200 reaper reaper 38454 427633 0 0 3 0x14200 pgdaemon pagedaemon 13522 207544 0 0 3 0x14200 bored crynlk 87198 30870 0 0 3 0x14200 bored crypto 91069 501709 0 0 3 0x40014200 acpi0 acpi0 95610 238572 0 0 3 0x40014200 idle1 58826 359858 0 0 3 0x14200 bored softnet 5429 15540 0 0 3 0x14200 bored systqmp 10134 74118 0 0 3 0x14200 bored systq 30496 427106 0 0 3 0x40014200 bored softclock 84106 322580 0 0 3 0x40014200 idle0 1 307878 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper