pool: free list modified: inpcb (2)
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syzbot
Sep 26, 2022, 5:38:36 PM9/26/22
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 96592628355e Fix a use after free in case mta_tls_init fai..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15aaa1ff080000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=53d4e8b6773aa2504aac
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a3cc758382e2/disk-96592628.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/23b53660e7f8/bsd-96592628.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1577b3ab427d/kernel-96592628.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+53d4e8...@syzkaller.appspotmail.com
panic: pool_do_get: inpcb free list modified: page 0xfffffd8071674000; item addr 0xfffffd8071674be8; offset 0x0=0x0 != 0xfb3e7a32c9de2315
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*208942 93321 0 0 0x4000000 0 syz-executor.7
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: 5
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: pool_do_get: inpcb free list modified: page 0xfffffd8071674000; item addr 0xfffffd8071674be8; offset 0x0=0x0 != 0xfb3e7a32c9de2315
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: -10
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e99cd40
rbx 0xfb3e7a32c9de2315
rdx 0
rcx 0
rax 0xffff8000217047f0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x88ae60cd8fc0f4fb
r11 0xb3249da4ac7f69ea
r12 0
r13 0xfffffd8071674be8
r14 0
r15 0x1
rip 0xffffffff81e41f28 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e99cd30
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.7) pid=208942 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=84, usrpri=84, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff8548,0xffff800021704020
process=0xffff8000ffff6fb0 user=0xffff80002e998000, vmspace=0xfffffd8068422668
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
29750 67295 19337 0 2 0 syz-executor.0
29750 130666 19337 0 2 0x4000000 syz-executor.0
93321 42454 1367 0 2 0 syz-executor.7
*93321 208942 1367 0 7 0x4000000 syz-executor.7
96881 414568 97367 0 2 0 syz-executor.1
96881 296478 97367 0 3 0x4000080 fsleep syz-executor.1
84568 224407 11498 0 2 0 syz-executor.2
84568 19419 11498 0 3 0x4000080 fsleep syz-executor.2
84568 151647 11498 0 3 0x4000080 fsleep syz-executor.2
82236 382508 67892 0 2 0 syz-executor.4
82236 94283 67892 0 3 0x4000080 fsleep syz-executor.4
82236 220233 67892 0 3 0x4000080 fsleep syz-executor.4
8247 439056 15685 0 2 0x2 syz-executor.5
97367 88777 15685 0 3 0x82 nanoslp syz-executor.1
97076 211608 15685 0 2 0x2 syz-executor.6
52941 504244 15685 0 3 0x82 nanoslp syz-executor.3
36435 393335 1 0 3 0x100083 ttyin getty
1367 414915 15685 0 3 0x82 nanoslp syz-executor.7
76575 318599 0 0 3 0x14200 acct acct
67892 291396 15685 0 3 0x82 nanoslp syz-executor.4
83220 263095 0 0 3 0x14200 bored sosplice
12541 160066 0 0 3 0x14280 nfsidl nfsio
97795 368558 0 0 3 0x14280 nfsidl nfsio
1330 302293 0 0 3 0x14280 nfsidl nfsio
48764 141745 0 0 3 0x14280 nfsidl nfsio
80029 504680 0 0 3 0x14280 nfsidl nfsio
27597 213669 0 0 3 0x14280 nfsidl nfsio
46531 324722 0 0 3 0x14280 nfsidl nfsio
6614 495727 0 0 3 0x14280 nfsidl nfsio
90082 113910 0 0 3 0x14280 nfsidl nfsio
37998 393471 0 0 3 0x14280 nfsidl nfsio
69407 86058 0 0 3 0x14280 nfsidl nfsio
98565 370804 0 0 3 0x14280 nfsidl nfsio
69735 200074 0 0 3 0x14280 nfsidl nfsio
82467 132666 0 0 3 0x14280 nfsidl nfsio
84025 454755 0 0 3 0x14280 nfsidl nfsio
37131 292091 0 0 3 0x14280 nfsidl nfsio
78632 438930 0 0 3 0x14280 nfsidl nfsio
52276 175051 0 0 3 0x14280 nfsidl nfsio
95665 5718 0 0 3 0x14280 nfsidl nfsio
8164 514125 0 0 3 0x14280 nfsidl nfsio
11498 103110 15685 0 3 0x82 nanoslp syz-executor.2
19337 45591 15685 0 3 0x82 nanoslp syz-executor.0
15685 120336 57849 0 3 0x82 wait syz-fuzzer
15685 479149 57849 0 3 0x4000082 nanoslp syz-fuzzer
15685 93756 57849 0 3 0x4000082 wait syz-fuzzer
15685 418816 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 447209 57849 0 3 0x4000082 wait syz-fuzzer
15685 227248 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 514369 57849 0 3 0x4000082 kqread syz-fuzzer
15685 225314 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 118099 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 41415 57849 0 3 0x4000082 wait syz-fuzzer
15685 374039 57849 0 3 0x4000082 wait syz-fuzzer
15685 21654 57849 0 3 0x4000082 wait syz-fuzzer
15685 187071 57849 0 3 0x4000082 wait syz-fuzzer
15685 136050 57849 0 3 0x4000082 wait syz-fuzzer
57849 88512 50235 0 3 0x10008a sigsusp ksh
50235 252930 29364 0 3 0x9a kqread sshd
29364 310408 1 0 3 0x88 kqread sshd
92361 522190 87897 73 3 0x1100090 kqread syslogd
87897 124509 1 0 3 0x100082 netio syslogd
26088 326029 1 0 3 0x100080 kqread resolvd
22580 508604 45695 77 3 0x100092 kqread dhcpleased
25865 144 45695 77 3 0x100092 kqread dhcpleased
45695 46035 1 0 3 0x80 kqread dhcpleased
54187 177936 0 0 3 0x14200 bored smr
52646 22484 0 0 2 0x14200 zerothread
33435 259600 0 0 3 0x14200 aiodoned aiodoned
75602 234248 0 0 3 0x14200 syncer update
60015 394896 0 0 3 0x14200 cleaner cleaner
46301 58046 0 0 3 0x14200 reaper reaper
18511 253165 0 0 3 0x14200 pgdaemon pagedaemon
48175 297566 0 0 3 0x14200 bored viomb
63045 305704 0 0 3 0x40014200 acpi0 acpi0
72973 475725 0 0 3 0x14200 bored softnet
70881 120395 0 0 3 0x14200 bored softnet
27089 153623 0 0 3 0x14200 bored softnet
29852 253599 0 0 3 0x14200 bored softnet
53202 86341 0 0 3 0x14200 bored systqmp
17146 390555 0 0 3 0x14200 bored systq
95581 403167 0 0 3 0x40014200 bored softclock
20392 292142 0 0 3 0x40014200 idle0
1 265248 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10182 6473K 6889K 78643K 14341 0
pcb 13 11K 12K 78643K 289 0
rtable 191 9K 10K 78643K 895 0
ifaddr 102 22K 22K 78643K 472 0
sysctl 2 0K 0K 78643K 2 0
counters 26 17K 17K 78643K 74 0
ioctlops 0 0K 4K 78643K 1031 0
iov 0 0K 20K 78643K 255 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1366 85K 86K 78643K 2916 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 14 0
VM map 2 0K 0K 78643K 2 0
sem 9 2K 2K 78643K 46 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 15 53K 73K 78643K 2610 0
sigio 0 0K 0K 78643K 13 0
proc 59 59K 75K 78643K 819 0
subproc 104 6K 6K 78643K 250 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 242 0
in_multi 80 5K 7K 78643K 294 0
ether_multi 1 0K 0K 78643K 16 0
mrt 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 73 334K 334K 78643K 73 0
exec 0 0K 2K 78643K 1492 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 264 211K 243K 78643K 15644 0
UVM aobj 25 2K 2K 78643K 27 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 138 0
NDP 13 0K 1K 78643K 99 0
temp 128 4726K 5746K 78643K 44052 0
kqueue 12 18K 24K 78643K 208 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 1191 0 1186 13 8 5 5 0 8 4
rtentry 112 268 0 186 4 1 3 4 0 8 0
unpcb 144 1637 0 1622 14 13 1 6 0 8 0
syncache 296 18 0 18 4 4 0 1 0 8 0
tcpqe 32 8 0 8 2 2 0 1 0 8 0
tcpcb 768 847 0 839 22 20 2 8 0 8 0
arp 88 44 0 30 1 0 1 1 0 8 0
inpcb 336 2466 0 2394 26 19 7 10 0 8 1
inpcb: pool(0xffffffff82a121c8:inpcb): free list modified: page 0xfffffd8071674000; item ordinal 0; addr 0xfffffd8071674be8 (p 0xfffffd8079e8e000); offset 0x0=0x0
pool(inpcb): free list modified: page 0xfffffd8071674000; item ordinal 0; addr 0xfffffd8071674be8 (p 0xfffffd8079e8e000); offset 0x0=0x0
inpcb: pool(0xffffffff82a121c8:inpcb): page inconsistency: page 0xfffffd8071674000; item ordinal 1; addr 0x80b564ed1582e051
nd6 48 63 0 43 1 0 1 1 0 8 0
pkpcb 40 10 0 10 2 2 0 1 0 8 0
kcovpl 48 19 0 11 1 0 1 1 0 8 0
ppxss 1160 20 0 20 3 3 0 1 0 8 0
pfstscr 40 16 0 13 1 0 1 1 0 8 0
pfanchor 1280 1 0 0 1 0 1 1 0 8 0
pfstitem 24 4 0 0 1 0 1 1 0 8 0
pfstkey 120 30 0 26 1 0 1 1 0 8 0
pfstate 336 15 0 13 1 0 1 1 0 8 0
pfrule 1360 109 0 0 10 0 10 10 0 8 0
art_heap8 4096 5 0 4 4 3 1 3 0 8 0
art_heap4 256 1197 0 834 37 9 28 29 0 8 0
art_table 32 1202 0 838 4 0 4 4 0 8 0
art_node 16 267 0 195 1 0 1 1 0 8 0
sysvmsgpl 40 84 0 73 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 7 0 0 1 0 1 1 0 8 0
shmpl 112 24 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 5144 0 3710 90 0 90 90 0 8 0
ffsino 240 5144 0 3710 85 0 85 85 0 8 0
nchpl 144 9196 0 7564 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 35214 0 35213 4 3 1 2 0 8 0
vcpupl 2048 10 0 1 2 0 2 2 0 8 0
vmpool 536 14 0 5 1 0 1 1 0 8 0
kstatmem 264 114 0 90 4 2 2 3 0 8 0
scsiplug 72 14 0 14 1 1 0 1 0 8 0
scxspl 216 23888 0 23888 13 11 2 8 0 8 2
plimitpl 152 297 0 282 1 0 1 1 0 8 0
sigapl 424 2903 0 2838 8 0 8 8 0 8 0
futexpl 64 29091 0 29086 1 0 1 1 0 8 0
knotepl 120 29995 0 29915 17 6 11 11 0 8 7
kqueuepl 184 1476 0 1466 13 10 3 4 0 8 2
pipepl 288 551 0 523 12 9 3 7 0 8 0
fdescpl 432 2865 0 2839 4 0 4 4 0 8 0
filepl 120 24637 0 24267 31 18 13 16 0 8 1
lockfpl 104 556 0 554 1 0 1 1 0 8 0
lockfspl 48 188 0 186 1 0 1 1 0 8 0
sessionpl 144 35 0 19 1 0 1 1 0 8 0
pgrppl 48 35 0 19 1 0 1 1 0 8 0
ucredpl 104 4369 0 4358 1 0 1 1 0 8 0
zombiepl 144 2839 0 2838 2 1 1 1 0 8 0
processpl 1000 2903 0 2838 10 1 9 9 0 8 0
procpl 672 7079 0 6994 12 3 9 9 0 8 1
sosppl 168 21 0 20 3 2 1 1 0 8 0
sockpl 456 5305 0 5209 98 85 13 25 0 8 1
mcl64k 65536 72 0 72 3 2 1 1 0 8 1
mcl16k 16384 25 0 25 4 3 1 1 0 8 1
mcl12k 12288 65 0 65 3 2 1 1 0 8 1
mcl9k 9216 21 0 21 3 3 0 1 0 8 0
mcl8k 8192 172 0 172 4 3 1 1 0 8 1
mcl4k 4096 484 0 484 4 3 1 3 0 8 1
mcl2k2 2112 17 0 17 5 4 1 1 0 8 1
mcl2k 2048 72600 0 72540 16 7 9 12 0 8 0
mtagpl 96 137 0 84 3 1 2 2 0 8 0
mbufpl 256 201317 0 201034 97 72 25 79 0 8 3
bufpl 288 8531 0 2119 459 0 459 459 0 8 0
anonpl 24 744472 0 727148 157 36 121 130 0 188 8
amapchunkpl 152 45792 0 45133 44 16 28 41 0 158 0
amappl16 200 20659 0 20002 63 25 38 51 0 8 2
amappl15 192 375 0 373 1 0 1 1 0 8 0
amappl14 184 251 0 248 1 0 1 1 0 8 0
amappl13 176 340 0 334 1 0 1 1 0 8 0
amappl12 168 82 0 79 1 0 1 1 0 8 0
amappl11 160 600 0 581 1 0 1 1 0 8 0
amappl10 152 515 0 508 1 0 1 1 0 8 0
amappl9 144 924 0 914 1 0 1 1 0 8 0
amappl8 136 854 0 802 2 0 2 2 0 8 0
amappl7 128 303 0 280 1 0 1 1 0 8 0
amappl6 120 679 0 664 2 1 1 2 0 8 0
amappl5 112 2535 0 2515 1 0 1 1 0 8 0
amappl4 104 1796 0 1769 2 1 1 2 0 8 0
amappl3 96 7850 0 7802 2 0 2 2 0 8 0
amappl2 88 3170 0 3108 2 0 2 2 0 8 0
amappl1 80 69523 0 68833 22 6 16 21 0 8 0
amappl 88 14928 0 14774 4 0 4 4 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 26 0 2 1 0 1 1 0 8 0
uaddrrnd 24 2879 0 2844 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2879 0 2844 1 0 1 1 0 8 0
vmmpekpl 168 26720 0 26662 3 0 3 3 0 8 0
vmmpepl 168 295932 0 293267 176 43 133 156 0 357 8
vmsppl 272 2878 0 2844 5 2 3 3 0 8 0
rwobjpl 24 87390 0 79728 47 0 47 47 0 8 0
pdppl 4096 5764 0 5697 232 159 73 75 0 8 6
pvpl 32 1452092 0 1430760 321 122 199 234 0 265 15
pmappl 216 2878 0 2844 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1101 0 296 25 0 25 25 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: -10
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: -10
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: 96592628355e Fix a use after free in case mta_tls_init fai..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15aaa1ff080000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=53d4e8b6773aa2504aac
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a3cc758382e2/disk-96592628.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/23b53660e7f8/bsd-96592628.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1577b3ab427d/kernel-96592628.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+53d4e8...@syzkaller.appspotmail.com
panic: pool_do_get: inpcb free list modified: page 0xfffffd8071674000; item addr 0xfffffd8071674be8; offset 0x0=0x0 != 0xfb3e7a32c9de2315
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*208942 93321 0 0 0x4000000 0 syz-executor.7
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: 5
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb>
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: pool_do_get: inpcb free list modified: page 0xfffffd8071674000; item addr 0xfffffd8071674be8; offset 0x0=0x0 != 0xfb3e7a32c9de2315
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: -10
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002e99cd40
rbx 0xfb3e7a32c9de2315
rdx 0
rcx 0
rax 0xffff8000217047f0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x88ae60cd8fc0f4fb
r11 0xb3249da4ac7f69ea
r12 0
r13 0xfffffd8071674be8
r14 0
r15 0x1
rip 0xffffffff81e41f28 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002e99cd30
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor.7) pid=208942 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=84, usrpri=84, nice=20
forw=0xffffffffffffffff, list=0xffff8000ffff8548,0xffff800021704020
process=0xffff8000ffff6fb0 user=0xffff80002e998000, vmspace=0xfffffd8068422668
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
29750 67295 19337 0 2 0 syz-executor.0
29750 130666 19337 0 2 0x4000000 syz-executor.0
93321 42454 1367 0 2 0 syz-executor.7
*93321 208942 1367 0 7 0x4000000 syz-executor.7
96881 414568 97367 0 2 0 syz-executor.1
96881 296478 97367 0 3 0x4000080 fsleep syz-executor.1
84568 224407 11498 0 2 0 syz-executor.2
84568 19419 11498 0 3 0x4000080 fsleep syz-executor.2
84568 151647 11498 0 3 0x4000080 fsleep syz-executor.2
82236 382508 67892 0 2 0 syz-executor.4
82236 94283 67892 0 3 0x4000080 fsleep syz-executor.4
82236 220233 67892 0 3 0x4000080 fsleep syz-executor.4
8247 439056 15685 0 2 0x2 syz-executor.5
97367 88777 15685 0 3 0x82 nanoslp syz-executor.1
97076 211608 15685 0 2 0x2 syz-executor.6
52941 504244 15685 0 3 0x82 nanoslp syz-executor.3
36435 393335 1 0 3 0x100083 ttyin getty
1367 414915 15685 0 3 0x82 nanoslp syz-executor.7
76575 318599 0 0 3 0x14200 acct acct
67892 291396 15685 0 3 0x82 nanoslp syz-executor.4
83220 263095 0 0 3 0x14200 bored sosplice
12541 160066 0 0 3 0x14280 nfsidl nfsio
97795 368558 0 0 3 0x14280 nfsidl nfsio
1330 302293 0 0 3 0x14280 nfsidl nfsio
48764 141745 0 0 3 0x14280 nfsidl nfsio
80029 504680 0 0 3 0x14280 nfsidl nfsio
27597 213669 0 0 3 0x14280 nfsidl nfsio
46531 324722 0 0 3 0x14280 nfsidl nfsio
6614 495727 0 0 3 0x14280 nfsidl nfsio
90082 113910 0 0 3 0x14280 nfsidl nfsio
37998 393471 0 0 3 0x14280 nfsidl nfsio
69407 86058 0 0 3 0x14280 nfsidl nfsio
98565 370804 0 0 3 0x14280 nfsidl nfsio
69735 200074 0 0 3 0x14280 nfsidl nfsio
82467 132666 0 0 3 0x14280 nfsidl nfsio
84025 454755 0 0 3 0x14280 nfsidl nfsio
37131 292091 0 0 3 0x14280 nfsidl nfsio
78632 438930 0 0 3 0x14280 nfsidl nfsio
52276 175051 0 0 3 0x14280 nfsidl nfsio
95665 5718 0 0 3 0x14280 nfsidl nfsio
8164 514125 0 0 3 0x14280 nfsidl nfsio
11498 103110 15685 0 3 0x82 nanoslp syz-executor.2
19337 45591 15685 0 3 0x82 nanoslp syz-executor.0
15685 120336 57849 0 3 0x82 wait syz-fuzzer
15685 479149 57849 0 3 0x4000082 nanoslp syz-fuzzer
15685 93756 57849 0 3 0x4000082 wait syz-fuzzer
15685 418816 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 447209 57849 0 3 0x4000082 wait syz-fuzzer
15685 227248 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 514369 57849 0 3 0x4000082 kqread syz-fuzzer
15685 225314 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 118099 57849 0 3 0x4000082 thrsleep syz-fuzzer
15685 41415 57849 0 3 0x4000082 wait syz-fuzzer
15685 374039 57849 0 3 0x4000082 wait syz-fuzzer
15685 21654 57849 0 3 0x4000082 wait syz-fuzzer
15685 187071 57849 0 3 0x4000082 wait syz-fuzzer
15685 136050 57849 0 3 0x4000082 wait syz-fuzzer
57849 88512 50235 0 3 0x10008a sigsusp ksh
50235 252930 29364 0 3 0x9a kqread sshd
29364 310408 1 0 3 0x88 kqread sshd
92361 522190 87897 73 3 0x1100090 kqread syslogd
87897 124509 1 0 3 0x100082 netio syslogd
26088 326029 1 0 3 0x100080 kqread resolvd
22580 508604 45695 77 3 0x100092 kqread dhcpleased
25865 144 45695 77 3 0x100092 kqread dhcpleased
45695 46035 1 0 3 0x80 kqread dhcpleased
54187 177936 0 0 3 0x14200 bored smr
52646 22484 0 0 2 0x14200 zerothread
33435 259600 0 0 3 0x14200 aiodoned aiodoned
75602 234248 0 0 3 0x14200 syncer update
60015 394896 0 0 3 0x14200 cleaner cleaner
46301 58046 0 0 3 0x14200 reaper reaper
18511 253165 0 0 3 0x14200 pgdaemon pagedaemon
48175 297566 0 0 3 0x14200 bored viomb
63045 305704 0 0 3 0x40014200 acpi0 acpi0
72973 475725 0 0 3 0x14200 bored softnet
70881 120395 0 0 3 0x14200 bored softnet
27089 153623 0 0 3 0x14200 bored softnet
29852 253599 0 0 3 0x14200 bored softnet
53202 86341 0 0 3 0x14200 bored systqmp
17146 390555 0 0 3 0x14200 bored systq
95581 403167 0 0 3 0x40014200 bored softclock
20392 292142 0 0 3 0x40014200 idle0
1 265248 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10182 6473K 6889K 78643K 14341 0
pcb 13 11K 12K 78643K 289 0
rtable 191 9K 10K 78643K 895 0
ifaddr 102 22K 22K 78643K 472 0
sysctl 2 0K 0K 78643K 2 0
counters 26 17K 17K 78643K 74 0
ioctlops 0 0K 4K 78643K 1031 0
iov 0 0K 20K 78643K 255 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 4 0
vnodes 1366 85K 86K 78643K 2916 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 14 0
VM map 2 0K 0K 78643K 2 0
sem 9 2K 2K 78643K 46 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12548 0
file desc 15 53K 73K 78643K 2610 0
sigio 0 0K 0K 78643K 13 0
proc 59 59K 75K 78643K 819 0
subproc 104 6K 6K 78643K 250 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 242 0
in_multi 80 5K 7K 78643K 294 0
ether_multi 1 0K 0K 78643K 16 0
mrt 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 73 334K 334K 78643K 73 0
exec 0 0K 2K 78643K 1492 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 8 62K 64K 78643K 10 0
UVM amap 264 211K 243K 78643K 15644 0
UVM aobj 25 2K 2K 78643K 27 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 138 0
NDP 13 0K 1K 78643K 99 0
temp 128 4726K 5746K 78643K 44052 0
kqueue 12 18K 24K 78643K 208 0
SYN cache 2 16K 16K 78643K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 1191 0 1186 13 8 5 5 0 8 4
rtentry 112 268 0 186 4 1 3 4 0 8 0
unpcb 144 1637 0 1622 14 13 1 6 0 8 0
syncache 296 18 0 18 4 4 0 1 0 8 0
tcpqe 32 8 0 8 2 2 0 1 0 8 0
tcpcb 768 847 0 839 22 20 2 8 0 8 0
arp 88 44 0 30 1 0 1 1 0 8 0
inpcb 336 2466 0 2394 26 19 7 10 0 8 1
inpcb: pool(0xffffffff82a121c8:inpcb): free list modified: page 0xfffffd8071674000; item ordinal 0; addr 0xfffffd8071674be8 (p 0xfffffd8079e8e000); offset 0x0=0x0
pool(inpcb): free list modified: page 0xfffffd8071674000; item ordinal 0; addr 0xfffffd8071674be8 (p 0xfffffd8079e8e000); offset 0x0=0x0
inpcb: pool(0xffffffff82a121c8:inpcb): page inconsistency: page 0xfffffd8071674000; item ordinal 1; addr 0x80b564ed1582e051
nd6 48 63 0 43 1 0 1 1 0 8 0
pkpcb 40 10 0 10 2 2 0 1 0 8 0
kcovpl 48 19 0 11 1 0 1 1 0 8 0
ppxss 1160 20 0 20 3 3 0 1 0 8 0
pfstscr 40 16 0 13 1 0 1 1 0 8 0
pfanchor 1280 1 0 0 1 0 1 1 0 8 0
pfstitem 24 4 0 0 1 0 1 1 0 8 0
pfstkey 120 30 0 26 1 0 1 1 0 8 0
pfstate 336 15 0 13 1 0 1 1 0 8 0
pfrule 1360 109 0 0 10 0 10 10 0 8 0
art_heap8 4096 5 0 4 4 3 1 3 0 8 0
art_heap4 256 1197 0 834 37 9 28 29 0 8 0
art_table 32 1202 0 838 4 0 4 4 0 8 0
art_node 16 267 0 195 1 0 1 1 0 8 0
sysvmsgpl 40 84 0 73 1 0 1 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 7 0 0 1 0 1 1 0 8 0
shmpl 112 24 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 5144 0 3710 90 0 90 90 0 8 0
ffsino 240 5144 0 3710 85 0 85 85 0 8 0
nchpl 144 9196 0 7564 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 35214 0 35213 4 3 1 2 0 8 0
vcpupl 2048 10 0 1 2 0 2 2 0 8 0
vmpool 536 14 0 5 1 0 1 1 0 8 0
kstatmem 264 114 0 90 4 2 2 3 0 8 0
scsiplug 72 14 0 14 1 1 0 1 0 8 0
scxspl 216 23888 0 23888 13 11 2 8 0 8 2
plimitpl 152 297 0 282 1 0 1 1 0 8 0
sigapl 424 2903 0 2838 8 0 8 8 0 8 0
futexpl 64 29091 0 29086 1 0 1 1 0 8 0
knotepl 120 29995 0 29915 17 6 11 11 0 8 7
kqueuepl 184 1476 0 1466 13 10 3 4 0 8 2
pipepl 288 551 0 523 12 9 3 7 0 8 0
fdescpl 432 2865 0 2839 4 0 4 4 0 8 0
filepl 120 24637 0 24267 31 18 13 16 0 8 1
lockfpl 104 556 0 554 1 0 1 1 0 8 0
lockfspl 48 188 0 186 1 0 1 1 0 8 0
sessionpl 144 35 0 19 1 0 1 1 0 8 0
pgrppl 48 35 0 19 1 0 1 1 0 8 0
ucredpl 104 4369 0 4358 1 0 1 1 0 8 0
zombiepl 144 2839 0 2838 2 1 1 1 0 8 0
processpl 1000 2903 0 2838 10 1 9 9 0 8 0
procpl 672 7079 0 6994 12 3 9 9 0 8 1
sosppl 168 21 0 20 3 2 1 1 0 8 0
sockpl 456 5305 0 5209 98 85 13 25 0 8 1
mcl64k 65536 72 0 72 3 2 1 1 0 8 1
mcl16k 16384 25 0 25 4 3 1 1 0 8 1
mcl12k 12288 65 0 65 3 2 1 1 0 8 1
mcl9k 9216 21 0 21 3 3 0 1 0 8 0
mcl8k 8192 172 0 172 4 3 1 1 0 8 1
mcl4k 4096 484 0 484 4 3 1 3 0 8 1
mcl2k2 2112 17 0 17 5 4 1 1 0 8 1
mcl2k 2048 72600 0 72540 16 7 9 12 0 8 0
mtagpl 96 137 0 84 3 1 2 2 0 8 0
mbufpl 256 201317 0 201034 97 72 25 79 0 8 3
bufpl 288 8531 0 2119 459 0 459 459 0 8 0
anonpl 24 744472 0 727148 157 36 121 130 0 188 8
amapchunkpl 152 45792 0 45133 44 16 28 41 0 158 0
amappl16 200 20659 0 20002 63 25 38 51 0 8 2
amappl15 192 375 0 373 1 0 1 1 0 8 0
amappl14 184 251 0 248 1 0 1 1 0 8 0
amappl13 176 340 0 334 1 0 1 1 0 8 0
amappl12 168 82 0 79 1 0 1 1 0 8 0
amappl11 160 600 0 581 1 0 1 1 0 8 0
amappl10 152 515 0 508 1 0 1 1 0 8 0
amappl9 144 924 0 914 1 0 1 1 0 8 0
amappl8 136 854 0 802 2 0 2 2 0 8 0
amappl7 128 303 0 280 1 0 1 1 0 8 0
amappl6 120 679 0 664 2 1 1 2 0 8 0
amappl5 112 2535 0 2515 1 0 1 1 0 8 0
amappl4 104 1796 0 1769 2 1 1 2 0 8 0
amappl3 96 7850 0 7802 2 0 2 2 0 8 0
amappl2 88 3170 0 3108 2 0 2 2 0 8 0
amappl1 80 69523 0 68833 22 6 16 21 0 8 0
amappl 88 14928 0 14774 4 0 4 4 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 26 0 2 1 0 1 1 0 8 0
uaddrrnd 24 2879 0 2844 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2879 0 2844 1 0 1 1 0 8 0
vmmpekpl 168 26720 0 26662 3 0 3 3 0 8 0
vmmpepl 168 295932 0 293267 176 43 133 156 0 357 8
vmsppl 272 2878 0 2844 5 2 3 3 0 8 0
rwobjpl 24 87390 0 79728 47 0 47 47 0 8 0
pdppl 4096 5764 0 5697 232 159 73 75 0 8 6
pvpl 32 1452092 0 1430760 321 122 199 234 0 265 15
pmappl 216 2878 0 2844 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 1101 0 296 25 0 25 25 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: -10
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff826147df) at panic+0x161 sys/kern/subr_prf.c:198
pool_do_get(ffffffff82a121c8,a,ffff80002e99cec8) at pool_do_get+0x427 sys/kern/subr_pool.c:738
pool_get(ffffffff82a121c8,a) at pool_get+0xb3 sys/kern/subr_pool.c:582
in_pcballoc(fffffd8068a6bca0,ffffffff829da528) at in_pcballoc+0x3c sys/netinet/in_pcb.c:234
udp_attach(fffffd8068a6bca0,0) at udp_attach+0xde sys/netinet/udp_usrreq.c:1093
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 pru_attach sys/sys/protosw.h:272 [inline]
socreate(18,ffff80002e99d048,2,0) at socreate+0x226 sys/kern/uipc_socket.c:196
sys_socket(ffff8000217047f0,ffff80002e99d0d8,ffff80002e99d130) at sys_socket+0xd8 sys/kern/uipc_syscalls.c:98
syscall(ffff80002e99d1a0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe1e25585170, count: -10
---
This report is generated by a bot. It may contain errors.
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syzbot
Feb 17, 2023, 10:15:33 AM2/17/23
to syzkaller-o...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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