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(2d6ad77c0ff856c2,0,ffffff00726db0c8,ffff8000042dfbe0,128) 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(7f34bf0d9d0c11a8,ffffff0072540690,6,2,ffffff0067c9cb80) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699
sys_flock(51cd01a9221b7d73,830,ffff8000210732d8) at sys_flock+0x163
syscall(4b7703e9ad6d0ecc) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline]
syscall(4b7703e9ad6d0ecc) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583
Xsyscall(6,0,ffffffffffffff4f,0,2,f8d33a00010) at Xsyscall+0x128
end of kernel
end trace frame: 0xf8ffe047890, count: -6
ddb{0}> show registers
rdi 0xdeaf4152deaf4152
rsi 0xffffffff812e35d5 lf_findoverlap+0x95
rbp 0xffff8000211673e0
rbx 0xdeaf4152deaf4152
rdx 0xffff8000042e0000
rcx 0x20c
rax 0xffff8000042e0000
r8 0xffff800021167418
r9 0
r10 0x743078bbe71977e6
r11 0xf7ca6d55b8dbaf08
r12 0x2
r13 0xffffff00726db0c8
r14 0xffff800021167418
r15 0
rip 0xffffffff812e35fb lf_findoverlap+0xbb
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff800021167380
ss 0x10
lf_findoverlap+0xbb: movq 0x18(%rbx),%rax
ddb{0}> show proc
PROC (syz-executor1) pid=366301 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=40, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800021072270,0xffff800021072730
process=0xffff800021075708 user=0xffff800021162000, vmspace=0xffffff0065971e78
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
40912 57187 12773 65534 3 0x90 nanosleep syz-executor0
40912 458255 12773 65534 3 0x4000090 netcon2 syz-executor0
40912 336819 12773 65534 3 0x4000090 fsleep syz-executor0
4002 150335 12215 65534 2 0x10 syz-executor1
* 4002 366301 12215 65534 7 0x4000010 syz-executor1
4002 437402 12215 65534 2 0x4000090 syz-executor1
4002 71521 12215 65534 2 0x4000010 syz-executor1
4002 519114 12215 65534 7 0x4000090 syz-executor1
12215 93969 83082 65534 3 0x90 nanosleep syz-executor1
83082 472882 7039 0 3 0x82 wait syz-executor1
12773 205184 10473 65534 3 0x90 nanosleep syz-executor0
10473 338576 7039 0 3 0x82 wait syz-executor0
28235 454271 0 0 3 0x14200 bored sosplice
7039 333832 33075 0 3 0x82 thrsleep syz-fuzzer
7039 284224 33075 0 3 0x4000082 thrsleep syz-fuzzer
7039 149321 33075 0 3 0x4000082 thrsleep syz-fuzzer
7039 134031 33075 0 3 0x4000082 thrsleep syz-fuzzer
7039 116541 33075 0 3 0x4000082 thrsleep syz-fuzzer
7039 264854 33075 0 3 0x4000082 thrsleep syz-fuzzer
7039 58229 33075 0 3 0x4000082 thrsleep syz-fuzzer
7039 25594 33075 0 3 0x4000082 thrsleep syz-fuzzer
7039 97296 33075 0 3 0x4000082 kqread syz-fuzzer
7039 265022 33075 0 3 0x4000082 thrsleep syz-fuzzer
33075 284714 14062 0 3 0x10008a pause ksh
14062 309422 32306 0 3 0x92 select sshd
12770 497012 1 0 3 0x100083 ttyin getty
32306 373423 1 0 3 0x80 select sshd
40595 131107 90081 73 3 0x100090 kqread syslogd
90081 61523 1 0 3 0x100082 netio syslogd
57279 477790 1 77 3 0x100090 poll dhclient
39584 236775 1 0 3 0x80 poll dhclient
2155 279419 0 0 3 0x14200 pgzero zerothread
32787 104510 0 0 3 0x14200 aiodoned aiodoned
2361 229902 0 0 3 0x14200 syncer update
31561 429541 0 0 3 0x14200 cleaner cleaner
96211 240696 0 0 3 0x14200 reaper reaper
26226 87688 0 0 3 0x14200 pgdaemon pagedaemon
92364 408570 0 0 3 0x14200 bored crynlk
85480 437066 0 0 3 0x14200 bored crypto
26179 30743 0 0 3 0x40014200 acpi0 acpi0
53057 53078 0 0 3 0x40014200 idle1
19796 267513 0 0 3 0x14200 bored softnet
74195 124912 0 0 3 0x14200 bored systqmp
40062 33037 0 0 3 0x14200 bored systq
32119 14044 0 0 3 0x40014200 bored softclock
46875 479807 0 0 3 0x40014200 idle0
1 52225 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper