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(6e718281c913b8c8,0,ffffff006fedacd0,ffff800003edeee0,128) 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(28ee4c14b642ebf1,ffffff00765b6168,5,3,ffffff006996c6f0) at VOP_ADVLOCK+0x6e sys/kern/vfs_vops.c:699
sys_flock(60127ae1d6dc7d55,830,ffff800021062bd0) at sys_flock+0x163
syscall(822b4b793c8273f) at syscall+0x473 mi_syscall sys/sys/syscall_mi.h:99 [inline]
syscall(822b4b793c8273f) at syscall+0x473 sys/arch/amd64/amd64/trap.c:583
Xsyscall(6,0,ffffffffffffff4f,0,2,72b2153d010) at Xsyscall+0x128
end of kernel
end trace frame: 0x72d916f3680, count: -6
ddb{1}> show registers
rdi 0xdead4110dead4110
rsi 0xffffffff8137d455 lf_findoverlap+0x95
rbp 0xffff800021191c60
rbx 0xdead4110dead4110
rdx 0xffff800003edf000
rcx 0x337
rax 0xffff800003edf000
r8 0xffff800021191c98
r9 0x1
r10 0xd5c862d51826dbac
r11 0x58804b796443ce62
r12 0x2
r13 0xffffff006fedacd0
r14 0xffff800021191c98
r15 0
rip 0xffffffff8137d47b lf_findoverlap+0xbb
cs 0x8
rflags 0x10202 __ALIGN_SIZE+0xf202
rsp 0xffff800021191c00
ss 0x10
lf_findoverlap+0xbb: movq 0x18(%rbx),%rax
ddb{1}> show proc
PROC (syz-executor1) pid=326790 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
pri=40, usrpri=78, nice=20
forw=0xffffffffffffffff, list=0xffff800021062720,0xffff800021062280
process=0xffff800021065078 user=0xffff80002118c000, vmspace=0xffffff0065877c68
estcpu=36, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
76822 366971 25400 65534 2 0x10 syz-executor1
*76822 326790 25400 65534 7 0x4000010 syz-executor1
76822 503862 25400 65534 7 0x4000010 syz-executor1
76822 509501 25400 65534 2 0x4000010 syz-executor1
60168 298609 5768 65534 3 0x90 nanosleep syz-executor0
5768 440439 2547 0 3 0x82 wait syz-executor0
25400 30488 11276 65534 3 0x90 nanosleep syz-executor1
11276 305095 2547 0 3 0x82 wait syz-executor1
94986 179709 0 0 3 0x14200 bored sosplice
2547 378129 74850 0 3 0x82 thrsleep syz-fuzzer
2547 24992 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 405370 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 189647 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 279808 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 305003 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 203888 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 459743 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 336317 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 446529 74850 0 3 0x4000082 thrsleep syz-fuzzer
2547 159157 74850 0 3 0x4000082 kqread syz-fuzzer
74850 51708 69226 0 3 0x10008a pause ksh
69226 114275 68268 0 3 0x92 select sshd
12010 156868 1 0 3 0x100083 ttyin getty
68268 177209 1 0 3 0x80 select sshd
45833 389151 38588 73 3 0x100090 kqread syslogd
38588 231974 1 0 3 0x100082 netio syslogd
1882 403088 1 77 3 0x100090 poll dhclient
47208 419861 1 0 3 0x80 poll dhclient
11624 293597 0 0 3 0x14200 pgzero zerothread
98605 216479 0 0 3 0x14200 aiodoned aiodoned
32728 161953 0 0 3 0x14200 syncer update
18722 472111 0 0 3 0x14200 cleaner cleaner
31866 124543 0 0 3 0x14200 reaper reaper
57716 509091 0 0 3 0x14200 pgdaemon pagedaemon
2400 516062 0 0 3 0x14200 bored crynlk
74727 407202 0 0 3 0x14200 bored crypto
75532 175687 0 0 3 0x40014200 acpi0 acpi0
9128 399986 0 0 3 0x40014200 idle1
74658 481650 0 0 3 0x14200 bored softnet
94428 449647 0 0 3 0x14200 bored systqmp
70489 524011 0 0 3 0x14200 bored systq
19226 189615 0 0 3 0x40014200 bored softclock
33697 150370 0 0 3 0x40014200 idle0
1 302088 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper