kernel: protection fault trap, code=0
Stopped at memcmp+0x16: repe cmpsq (%rsi),%es:(%rdi)
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
memcmp() at memcmp+0x16
pipex_unlink_session_locked(ffff80003c440000) at pipex_unlink_session_locked+0x11f sys/net/pipex.c:-1
pipex_destroy_all_sessions(ffff80000148c000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff80000148c000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:154
pppacclose(637e,41,2000,ffff80003c4262c0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c413500) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd806b5592b0,41,fffffd80097fb478,ffff80003c4262c0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd8069421b88,ffff80003c4262c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd8069421b88,ffff80003c4262c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd8069421b88,ffff80003c4262c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8069421b88,ffff80003c4262c0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff80003c4262c0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff80003c4262c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80003c4262c0,ffff80003c413870,ffff80003c4137c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c413870) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c413870) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76d15293ea40, count: -14
ddb{0}> show registers
rdi 0xffff80003c440104
rsi 0xdeafbeaddeafbeb1
rbp 0xffff80003c4133a0
rbx 0xc
rdx 0xc
rcx 0x1
rax 0xffffffff837bdff0 cpu_info_full_primary+0x1ff0
r8 0xffffffffffffffff
r9 0
r10 0x5af7fb8026a51ff6
r11 0x401cd069cd1b8810
r12 0xffff80003c440104
r13 0
r14 0xffff80003c4412d0
r15 0x4
rip 0xffffffff810b2d36 memcmp+0x16
cs 0x8
rflags 0x10203 __ALIGN_SIZE+0xf203
rsp 0xffff80003c413338
ss 0
memcmp+0x16: repe cmpsq (%rsi),%es:(%rdi)
ddb{0}> show proc
PROC (syz-executor) tid=518307 pid=53593 tcnt=0 stat=onproc
flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff80003c4262c0 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff80003c426fb8,0xffff80003c426038
process=0xffff80002a3d04e8 user=0xffff80003c40e000, vmspace=0xfffffd806b7ce7c0
estcpu=36, cpticks=6, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
98805 522641 17389 0 2 0 syz-executor
98805 453070 17389 0 3 0x4000080 msgwait syz-executor
98805 155887 17389 0 3 0x4000080 msgwait syz-executor
48258 445441 13451 0 3 0x80 nanoslp syz-executor
48258 251327 13451 0 2 0x4000000 syz-executor
48258 37172 13451 0 3 0x4000080 fsleep syz-executor
74178 148700 20105 0 2 0 syz-executor
74178 76693 20105 0 3 0x4000080 fsleep syz-executor
14264 132885 93339 0 3 0x80 nanoslp syz-executor
14264 169879 93339 0 3 0x4000080 bell syz-executor
14264 484674 93339 0 3 0x4000080 fsleep syz-executor
79578 230845 42842 0 3 0x80 nanoslp syz-executor
79578 118951 42842 0 3 0x4000080 fsleep syz-executor
79578 283103 42842 0 3 0x4000080 ttyin syz-executor
79578 310904 42842 0 3 0x4000080 fsleep syz-executor
17389 516112 56005 0 2 0x2 syz-executor
42842 257604 56005 0 3 0x82 nanoslp syz-executor
13451 182020 56005 0 3 0x82 nanoslp syz-executor
93339 118583 56005 0 3 0x82 nanoslp syz-executor
81150 208474 56005 0 3 0x82 nanoslp syz-executor
14294 386944 56005 0 7 0x2 syz-executor
20105 466786 56005 0 3 0x82 nanoslp syz-executor
12753 296000 56005 0 3 0x82 nanoslp syz-executor
56005 141560 22407 0 3 0x82 kqread syz-executor
22407 152354 14603 0 3 0x10008a sigsusp ksh
14603 84991 15313 0 3 0x98 kqread sshd-session
15313 260458 99281 0 3 0x92 kqread sshd-session
94395 359026 1 0 3 0x100083 ttyin getty
99281 511537 1 0 3 0x88 kqread sshd
37300 159863 88687 74 3 0x1100092 bpf pflogd
88687 325192 1 0 3 0x80 sbwait pflogd
71033 241073 99343 73 3 0x1100090 kqread syslogd
99343 454731 1 0 3 0x100082 sbwait syslogd
71546 417218 1 0 3 0x100080 kqread resolvd
59948 506728 64116 77 2 0x100012 dhcpleased
16189 468382 64116 77 3 0x100092 kqread dhcpleased
64116 353442 1 0 3 0x80 kqread dhcpleased
84232 458773 0 0 3 0x14200 bored smr
52422 198248 0 0 3 0x14200 pgzero zerothread
51848 432225 0 0 3 0x14200 aiodoned aiodoned
82051 413180 0 0 3 0x14200 syncer update
59221 473483 0 0 3 0x14200 cleaner cleaner
48722 460689 0 0 3 0x14200 reaper reaper
11947 96590 0 0 3 0x14200 pgdaemon pagedaemon
86316 400537 0 0 3 0x14200 bored viomb
20805 134499 0 0 3 0x40014200 acpi0 acpi0
19305 19496 0 0 3 0x40014200 idle1
39450 87163 0 0 3 0x14200 bored softnet1
56334 521377 0 0 2 0x14200 softnet0
43677 402400 0 0 3 0x14200 bored systqmp
76737 505129 0 0 3 0x14200 bored systq
24471 126428 0 0 3 0x14200 tmoslp softclockmp
22182 257703 0 0 3 0x40014200 tmoslp softclock
21263 302905 0 0 3 0x40014200 idle0
1 439821 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff837db5d0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311
#2 mtx_enter+0x62 sys/kern/kern_lock.c:261
#3 pipex_destroy_all_sessions+0x2f sys/net/pipex.c:147
#4 pppacclose+0x16f sys/net/if_pppx.c:1335
#5 spec_close+0x417 sys/kern/spec_vnops.c:-1
#6 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
#7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
#7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615
#8 fdrop+0x121 sys/kern/kern_descrip.c:1280
#9 closef+0x192 sys/kern/kern_descrip.c:1264
#10 fdfree+0x116 sys/kern/kern_descrip.c:1195
#11 exit1+0x576 sys/kern/kern_exit.c:215
#12 sys_exit+0x1a sys/kern/kern_exit.c:-1
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746
#14 Xsyscall+0x128
Process 56334 (softnet0) thread 0xffff8000ffffe530 (521377)
shared rwlock softnet0 r = 0 (0xffff80000002c078)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10205 11153K 11264K 166960K 11340 0
pcb 17 12K 12K 166960K 29 0
rtable 210 7K 7K 166960K 272 0
pf 34 17K 19K 166960K 57 0
ifaddr 43 7K 7K 166960K 51 0
ifgroup 55 2K 2K 166960K 63 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 38K 166960K 84 0
ioctlops 0 0K 4K 166960K 1495 0
iov 0 0K 2K 166960K 4 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1347 85K 85K 166960K 1401 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 7 0K 0K 166960K 10 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 93K 166960K 181 0
proc 71 115K 180K 166960K 533 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 13 0
in_multi 99 7K 7K 166960K 108 0
ether_multi 1 0K 0K 166960K 1 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 61 281K 281K 166960K 61 0
exec 0 0K 1K 166960K 377 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 255 160K 169K 166960K 3454 0
UVM aobj 5 2K 2K 166960K 5 0
pinsyscall 43 86K 107K 166960K 1292 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 2 0K 0K 166960K 8 0
NDP 14 0K 1K 166960K 32 0
temp 37 8638K 8702K 166960K 4776 0
kqueue 13 20K 28K 166960K 31 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 42 0 39 1 0 1 1 0 8 0
rtentry 176 95 0 1 5 0 5 5 0 8 0
unpcb 144 41 0 24 1 0 1 1 0 8 0
syncache 336 3 0 3 1 0 1 1 0 8 1
tcpcb 736 22 0 16 1 0 1 1 0 8 0
arp 136 10 0 0 1 0 1 1 0 8 0
inpcb 328 109 0 98 2 0 2 2 0 8 1
nd6 144 16 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 8 0 7 1 0 1 1 0 8 0
pffrag 232 3 0 0 1 0 1 1 0 482 0
pffrnode 88 3 0 0 1 0 1 1 0 8 0
pffrent 40 4 0 1 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pftag 88 1 0 1 1 0 1 1 0 8 1
pfstitem 24 17 0 0 1 0 1 1 0 8 0
pfstkey 128 17 0 0 1 0 1 1 0 8 0
pfstate 384 17 0 0 2 0 2 2 0 8 0
pfrule 1344 24 0 18 2 0 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 437 0 0 28 0 28 28 0 8 0
art_table 40 438 0 0 5 0 5 5 0 8 0
art_node 32 95 0 11 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0
semapl 112 7 0 2 1 0 1 1 0 8 0
shmpl 112 2 0 0 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1648 0 134 96 0 96 96 0 8 0
ffsino 296 1648 0 134 117 0 117 117 0 8 0
nchpl 144 1890 0 195 63 0 63 63 0 8 0
rtmask 32 2 0 1 1 0 1 1 0 8 0
uvmvnodes 80 1757 0 0 36 0 36 36 0 8 0
vnodes 216 1757 0 0 98 0 98 98 0 8 0
namei 1024 5794 0 5794 1 0 1 1 0 8 1
percpumem 16 57 0 7 1 0 1 1 0 8 0
kstatmem 264 34 0 8 3 0 3 3 0 8 1
scxspl 216 6763 0 6763 3 1 2 2 1 8 2
plimitpl 152 34 0 17 1 0 1 1 0 8 0
sigapl 424 487 0 439 7 0 7 7 0 8 1
knotepl 120 312 0 0 10 0 10 10 0 8 0
kqueuepl 224 38 0 28 2 0 2 2 0 8 1
pipepl 344 107 0 80 3 0 3 3 0 8 0
fdescpl 528 471 0 439 3 0 3 3 0 8 0
filepl 160 1670 0 1436 10 0 10 10 0 8 0
lockfpl 104 25 0 22 1 0 1 1 0 8 0
lockfspl 48 13 0 10 1 0 1 1 0 8 0
sessionpl 144 22 0 13 1 0 1 1 0 8 0
pgrppl 48 30 0 13 1 0 1 1 0 8 0
ucredpl 104 125 0 111 1 0 1 1 0 8 0
zombiepl 144 442 0 439 1 0 1 1 0 8 0
processpl 1232 487 0 439 5 0 5 5 0 8 1
procpl 664 581 0 523 6 0 6 6 0 8 1
sockpl 752 193 0 162 4 0 4 4 0 8 0
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 113 0 0 15 0 15 15 0 8 0
mcl2k 2048 29 0 0 4 0 4 4 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 140 0 0 9 0 9 9 0 8 0
bufpl 280 3017 0 122 207 0 207 207 0 8 0
anonpl 32 3960 0 0 32 0 32 32 0 246 0
amapchunkpl 152 9789 0 9244 22 1 21 21 0 158 0
amappl16 200 2008 0 1981 5 1 4 5 0 8 2
amappl15 192 10 0 10 2 1 1 1 0 8 1
amappl14 184 115 0 103 1 0 1 1 0 8 0
amappl13 176 3 0 3 1 1 0 1 0 8 0
amappl12 168 1127 0 1095 4 1 3 3 0 8 1
amappl11 160 56 0 42 1 0 1 1 0 8 0
amappl10 152 12 0 12 1 1 0 1 0 8 0
amappl9 144 251 0 250 1 0 1 1 0 8 0
amappl8 136 27 0 25 1 0 1 1 0 8 0
amappl7 128 107 0 95 1 0 1 1 0 8 0
amappl6 120 183 0 180 1 0 1 1 0 8 0
amappl5 112 125 0 116 1 0 1 1 0 8 0
amappl4 104 314 0 293 1 0 1 1 0 8 0
amappl3 96 1507 0 1398 4 1 3 3 0 8 0
amappl2 88 701 0 624 2 0 2 2 0 8 0
amappl1 80 8470 0 7859 15 0 15 15 0 8 2
amappl 88 2758 0 2575 5 0 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 4 0 0 1 0 1 1 0 8 0
uaddrrnd 24 471 0 439 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 471 0 439 1 0 1 1 0 8 0
vmmpekpl 168 5438 0 5406 2 0 2 2 0 8 0
vmmpepl 168 36933 0 34897 89 0 89 89 0 357 0
vmsppl 488 470 0 439 5 0 5 5 0 8 1
rwobjpl 80 14832 0 12121 56 0 56 56 0 8 0
pdppl 4096 950 0 878 108 32 76 88 0 8 4
pvpl 32 10556 0 0 86 0 86 86 0 265 0
pmappl 256 470 0 439 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 276 0 34 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
memcmp() at memcmp+0x16
pipex_unlink_session_locked(ffff80003c440000) at pipex_unlink_session_locked+0x11f sys/net/pipex.c:-1
pipex_destroy_all_sessions(ffff80000148c000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline]
pipex_destroy_all_sessions(ffff80000148c000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:154
pppacclose(637e,41,2000,ffff80003c4262c0) at pppacclose+0x16f sys/net/if_pppx.c:1335
spec_close(ffff80003c413500) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd806b5592b0,41,fffffd80097fb478,ffff80003c4262c0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd8069421b88,ffff80003c4262c0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd8069421b88,ffff80003c4262c0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd8069421b88,ffff80003c4262c0) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd8069421b88,ffff80003c4262c0) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff80003c4262c0) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff80003c4262c0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80003c4262c0,ffff80003c413870,ffff80003c4137c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c413870) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c413870) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76d15293ea40, count: -14
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff839678b8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff839678b8) at __mp_lock+0x192 sys/kern/kern_lock.c:165
syscall(ffff80002a3387e0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a3387e0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x771551d67d30, count: -6