pool: free list modified: mcl4k
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syzbot
Mar 13, 2026, 9:34:33 PM (2 days ago) Mar 13
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: fd49698d88e5 Add support for RK3576 clocks and resets. A c..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=106b5406580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=bdfe7d1317633b5c4cf2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c159f2fe1cb1/disk-fd49698d.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/d321f1e712d8/bsd-fd49698d.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0df89642a17a/kernel-fd49698d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bdfe7d...@syzkaller.appspotmail.com
panic: pool_do_get: mcl4k free list modified: page 0xfffffd806d3bf000; item addr 0xfffffd806d3bf000; offset 0x0=0x11e57ed0 != 0x62dc609dd4cff30e
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*158768 11311 0 0 0 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: 6
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: mcl4k free list modified: page 0xfffffd806d3bf000; item addr 0xfffffd806d3bf000; offset 0x0=0x11e57ed0 != 0x62dc609dd4cff30e
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: -9
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002cccb750
rbx 0xfffffd806d3bf000
rdx 0
rcx 0
rax 0xffff80002f0d0038
r8 0x101010101010101
r9 0x8080808080808080
r10 0xa7ac1b07b9b942c3
r11 0x3f684f08e71c45ee
r12 0
r13 0xe9dbda04c2dc17ae
r14 0
r15 0x1
rip 0xffffffff82289575 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002cccb740
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor) tid=158768 pid=11311 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=50, usrpri=50, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002f0d1a28,0xffff80002f0d1270
process=0xffff8000fffefaa0 user=0xffff80002ccc6000, vmspace=0xfffffd807c59c748
estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=0, intr=1
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*11311 158768 59335 0 7 0 syz-executor
11311 40984 59335 0 2 0x4000000 syz-executor
8479 344792 36168 0 2 0 syz-executor
8479 488349 36168 0 3 0x4000080 fsleep syz-executor
8479 38671 36168 0 2 0x4000000 syz-executor
49871 351583 65627 0 2 0 syz-executor
49871 318109 65627 0 3 0x4000080 fsleep syz-executor
49871 329211 65627 0 3 0x4000080 fsleep syz-executor
80012 43573 83062 0 2 0x1 syz-executor
80012 172966 83062 0 3 0x4000080 fsleep syz-executor
80012 418732 83062 0 3 0x4000080 fsleep syz-executor
42348 47792 98346 0 3 0x80 nanoslp syz-executor
42348 413886 98346 0 3 0x4000080 fsleep syz-executor
42348 144537 98346 0 3 0x4000080 fsleep syz-executor
46540 178655 74528 0 2 0x1 syz-executor
46540 223709 74528 0 3 0x4000080 fsleep syz-executor
54545 203299 65835 0 3 0x80 nanoslp syz-executor
54545 390870 65835 0 3 0x4000080 sbwait syz-executor
54545 281924 65835 0 3 0x4000080 fsleep syz-executor
54545 204406 65835 0 3 0x4000080 fsleep syz-executor
3883 387353 0 0 3 0x14280 nfsidl nfsio
18100 376510 0 0 3 0x14280 nfsidl nfsio
33896 412769 0 0 3 0x14280 nfsidl nfsio
84645 416041 0 0 3 0x14280 nfsidl nfsio
86601 124810 0 0 3 0x14280 nfsidl nfsio
60343 154141 0 0 3 0x14280 nfsidl nfsio
89104 88148 0 0 3 0x14280 nfsidl nfsio
9522 262685 0 0 3 0x14280 nfsidl nfsio
8857 460036 0 0 3 0x14280 nfsidl nfsio
187 244597 0 0 3 0x14280 nfsidl nfsio
79149 424333 0 0 3 0x14280 nfsidl nfsio
13152 129721 0 0 3 0x14280 nfsidl nfsio
14210 197477 0 0 3 0x14280 nfsidl nfsio
80969 290045 0 0 3 0x14280 nfsidl nfsio
53988 387555 0 0 3 0x14280 nfsidl nfsio
67629 262189 0 0 3 0x14280 nfsidl nfsio
39929 295899 0 0 3 0x14280 nfsidl nfsio
6429 172287 0 0 3 0x14280 nfsidl nfsio
37946 461791 0 0 3 0x14280 nfsidl nfsio
34505 487025 0 0 3 0x14280 nfsidl nfsio
50371 362841 3745 0 3 0x82 sbwait sshd-session
98346 393910 9308 0 3 0x82 nanoslp syz-executor
65627 249180 9308 0 3 0x82 nanoslp syz-executor
36168 293402 9308 0 3 0x82 nanoslp syz-executor
83062 274083 9308 0 3 0x82 nanoslp syz-executor
65835 438953 9308 0 3 0x82 nanoslp syz-executor
59335 461881 9308 0 3 0x82 nanoslp syz-executor
7848 149096 9308 0 2 0x3 syz-executor
74528 350088 9308 0 3 0x82 nanoslp syz-executor
9308 102177 12414 0 2 0x3 syz-executor
12414 58045 3734 0 3 0x10008a sigsusp ksh
3734 128167 54191 0 3 0x98 kqread sshd-session
54191 136930 3745 0 3 0x92 kqread sshd-session
65427 393864 1 0 3 0x100083 ttyopn getty
3745 289409 1 0 3 0x88 kqread sshd
41933 426454 42568 73 3 0x1100090 kqread syslogd
42568 171255 1 0 3 0x100082 sbwait syslogd
37767 316593 1 0 3 0x100080 kqread resolvd
42912 382519 88017 77 3 0x100092 kqread dhcpleased
59336 143029 88017 77 3 0x100092 kqread dhcpleased
88017 132906 1 0 3 0x80 kqread dhcpleased
554 222701 0 0 3 0x14200 bored smr
61828 204950 0 0 2 0x14200 zerothread
68518 193053 0 0 3 0x14200 aiodoned aiodoned
2845 404852 0 0 3 0x14200 syncer update
60390 52310 0 0 3 0x14200 cleaner cleaner
41107 236025 0 0 3 0x14200 reaper reaper
27791 357511 0 0 3 0x14200 pgdaemon pagedaemon
63922 474139 0 0 3 0x14200 bored viomb
85078 514845 0 0 3 0x40014200 acpi0 acpi0
25276 375899 0 0 2 0x14200 softnet0
90574 209281 0 0 3 0x14200 bored systqmp
26851 461407 0 0 3 0x14200 bored systq
12224 195359 0 0 3 0x40014200 tmoslp softclock
83578 331300 0 0 3 0x40014200 idle0
1 226883 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11066 12111K 12519K 166960K 13913 0
pcb 17 14K 15K 166960K 294 0
rtable 243 10K 10K 166960K 805 0
pf 36 14K 16K 166960K 102 0
ifaddr 41 7K 8K 166960K 87 0
ifgroup 54 2K 2K 166960K 134 0
sysctl 4 1K 9K 166960K 13 0
counters 34 17K 18K 166960K 212 0
ioctlops 0 0K 4K 166960K 488 0
iov 0 0K 24K 166960K 85 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1378 87K 87K 166960K 2240 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 19 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 50 0
dirhash 12 2K 2K 166960K 30 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 97K 166960K 930 0
sigio 0 0K 0K 166960K 18 0
proc 60 59K 124K 166960K 562 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 111 0
in_multi 89 6K 7K 166960K 154 0
ether_multi 1 0K 0K 166960K 10 0
mrt 1 0K 0K 166960K 24 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 235 1049K 1049K 166960K 235 0
exec 0 0K 1K 166960K 509 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 235 161K 181K 166960K 10105 0
UVM aobj 59 12K 12K 166960K 63 0
pinsyscall 40 80K 96K 166960K 2086 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 2K 166960K 48 0
NDP 12 0K 2K 166960K 56 0
temp 80 9076K 9334K 166960K 31784 0
kqueue 13 20K 28K 166960K 142 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 123 0 120 1 0 1 1 0 8 0
rtentry 136 236 0 138 4 0 4 4 0 8 0
unpcb 144 1127 0 1104 7 1 6 6 0 8 5
syncache 336 16 0 16 2 1 1 1 0 8 1
tcpqe 32 10 0 10 2 1 1 1 0 8 1
tcpcb 736 422 0 407 11 3 8 8 0 8 6
arp 96 53 0 35 1 0 1 1 0 8 0
ipq 40 7 0 1 1 0 1 1 0 8 0
ipqe 40 9 0 3 1 0 1 1 0 8 0
inpcb 328 1089 0 1070 12 4 8 8 0 8 6
ip6q 72 7 0 2 1 0 1 1 0 8 0
ip6af 40 11 0 6 1 0 1 1 0 8 0
nd6 112 29 0 6 1 0 1 1 0 8 0
pkpcb 40 4 0 4 2 1 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1072 170 0 170 1 0 1 1 0 8 1
pppxif 1384 71 0 71 2 1 1 1 0 8 1
pfrktable 1344 2 0 2 1 1 0 1 0 8 0
pfqueue 320 1 0 1 1 1 0 1 0 8 0
pfstitem 24 5 0 0 1 0 1 1 0 8 0
pfstkey 128 7 0 4 1 0 1 1 0 8 0
pfstate 384 5 0 2 1 0 1 1 0 8 0
pfrule 1360 2 0 2 1 1 0 1 0 8 0
rttmr 136 1 0 1 1 0 1 1 0 8 1
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 743 0 326 39 10 29 39 0 8 0
art_table 40 746 0 326 7 1 6 7 0 8 0
art_node 32 234 0 145 2 0 2 2 0 8 0
sysvmsgpl 40 9 0 8 1 0 1 1 0 8 0
semupl 112 2 0 2 2 1 1 1 0 8 1
semapl 112 45 0 35 1 0 1 1 0 8 0
shmpl 112 54 0 3 2 0 2 2 0 8 0
dirhash 1024 30 0 13 3 0 3 3 0 8 0
dino2pl 256 3202 0 1756 92 0 92 92 0 8 0
ffsino 256 3202 0 1756 92 0 92 92 0 8 0
nchpl 144 4500 0 2808 64 0 64 64 0 8 0
rtmask 32 11 0 11 2 1 1 1 0 8 1
vnodes 216 3764 0 0 210 0 210 210 0 8 0
namei 1024 16462 0 16462 2 1 1 2 0 8 1
vcpupl 3904 6 0 1 1 0 1 1 0 8 0
vmpool 808 6 0 1 1 0 1 1 0 8 0
kstatmem 264 80 0 56 3 1 2 3 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 3 0 3 1 1 0 1 0 8 0
scxspl 216 16791 0 16791 9 7 2 8 1 8 2
plimitpl 152 390 0 374 1 0 1 1 0 8 0
sigapl 424 1257 0 1194 8 0 8 8 0 8 0
knotepl 120 46406 0 46358 21 9 12 15 0 8 8
kqueuepl 184 323 0 314 4 3 1 4 0 8 0
pipepl 304 353 0 326 12 5 7 8 0 8 4
fdescpl 448 1223 0 1193 5 1 4 5 0 8 0
filepl 120 9276 0 9047 19 4 15 15 0 8 7
lockfpl 104 344 0 342 1 0 1 1 0 8 0
lockfspl 48 131 0 129 1 0 1 1 0 8 0
sessionpl 144 34 0 25 1 0 1 1 0 8 0
pgrppl 48 52 0 35 1 0 1 1 0 8 0
ucredpl 104 1286 0 1275 1 0 1 1 0 8 0
zombiepl 144 1323 0 1323 1 0 1 1 0 8 1
processpl 1152 1257 0 1194 5 0 5 5 0 8 0
procpl 664 2575 0 2499 8 0 8 8 0 8 1
sosppl 176 6 0 6 2 1 1 1 0 8 1
sockpl 552 2439 0 2394 16 4 12 13 0 8 8
mcl64k 65536 40 0 39 2 1 1 1 0 8 0
mcl16k 16384 3 0 3 2 1 1 1 0 8 1
mcl12k 12288 2 0 2 1 1 0 1 0 8 0
mcl8k 8192 15 0 15 2 1 1 1 0 8 1
mcl4k 4096 3543 0 3485 16 8 8 15 0 8 0
mcl4k: pool(0xffffffff83955a10:mcl4k): free list modified: page 0xfffffd806d3bf000; item ordinal 0; addr 0xfffffd806d3bf000 (p 0xfffffd8078ae8000); offset 0x0=0x11e57ed0
pool(mcl4k): free list modified: page 0xfffffd806d3bf000; item ordinal 0; addr 0xfffffd806d3bf000 (p 0xfffffd8078ae8000); offset 0x0=0x0
mcl4k: pool(0xffffffff83955a10:mcl4k): page inconsistency: page 0xfffffd806d3bf000; item ordinal 1; addr 0xe9dbda04c2dc17ae
mcl2k 2048 1213 0 1205 4 2 2 3 0 8 1
mtagpl 96 20 0 9 1 0 1 1 0 8 0
mbufpl 256 17841 0 17614 149 129 20 88 0 8 1
bufpl 280 5265 0 111 369 0 369 369 0 8 0
anonpl 24 196792 0 191373 60 25 35 58 0 187 0
amapchunkpl 152 34242 0 33617 38 11 27 32 0 158 1
amappl16 200 3215 0 3183 24 20 4 20 0 8 0
amappl15 192 19 0 19 1 1 0 1 0 8 0
amappl14 184 426 0 425 1 0 1 1 0 8 0
amappl13 176 137 0 126 1 0 1 1 0 8 0
amappl12 168 1472 0 1443 2 0 2 2 0 8 0
amappl11 160 10 0 10 1 1 0 1 0 8 0
amappl10 152 59 0 49 1 0 1 1 0 8 0
amappl9 144 267 0 265 1 0 1 1 0 8 0
amappl8 136 94 0 93 1 0 1 1 0 8 0
amappl7 128 127 0 125 1 0 1 1 0 8 0
amappl6 120 257 0 245 1 0 1 1 0 8 0
amappl5 112 98 0 90 1 0 1 1 0 8 0
amappl4 104 548 0 510 2 0 2 2 0 8 0
amappl3 96 5928 0 5835 3 0 3 3 0 8 0
amappl2 88 1371 0 1304 2 0 2 2 0 8 0
amappl1 80 16018 0 15385 15 0 15 15 0 8 0
amappl 88 9205 0 9039 5 0 5 5 0 92 0
uvmvnodes 80 121 0 0 3 0 3 3 0 8 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 7 0 7 1 1 0 1 0 8 0
dma128 128 254 0 254 1 1 0 1 0 8 0
dma64 64 7 0 7 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 62 0 4 2 0 2 2 0 8 0
uaddrrnd 24 1223 0 1193 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1223 0 1193 1 0 1 1 0 8 0
vmmpekpl 168 12972 0 12942 2 0 2 2 0 8 0
vmmpepl 168 87996 0 86037 103 9 94 103 0 357 5
vmsppl 368 1222 0 1193 4 1 3 4 0 8 0
rwobjpl 40 26333 0 25192 15 1 14 15 0 8 0
pdppl 4096 2464 0 2393 118 45 73 82 0 8 2
pvpl 32 553622 0 541503 146 33 113 136 0 265 10
pmappl 216 1228 0 1194 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 552 0 208 13 2 11 13 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: -9
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: -9
---
This report is generated by a bot. It may contain errors.
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syzbot found the following issue on:
HEAD commit: fd49698d88e5 Add support for RK3576 clocks and resets. A c..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=106b5406580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=bdfe7d1317633b5c4cf2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c159f2fe1cb1/disk-fd49698d.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/d321f1e712d8/bsd-fd49698d.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0df89642a17a/kernel-fd49698d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bdfe7d...@syzkaller.appspotmail.com
panic: pool_do_get: mcl4k free list modified: page 0xfffffd806d3bf000; item addr 0xfffffd806d3bf000; offset 0x0=0x11e57ed0 != 0x62dc609dd4cff30e
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*158768 11311 0 0 0 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: 6
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: mcl4k free list modified: page 0xfffffd806d3bf000; item addr 0xfffffd806d3bf000; offset 0x0=0x11e57ed0 != 0x62dc609dd4cff30e
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: -9
ddb> show registers
rdi 0
rsi 0x1
rbp 0xffff80002cccb750
rbx 0xfffffd806d3bf000
rdx 0
rcx 0
rax 0xffff80002f0d0038
r8 0x101010101010101
r9 0x8080808080808080
r10 0xa7ac1b07b9b942c3
r11 0x3f684f08e71c45ee
r12 0
r13 0xe9dbda04c2dc17ae
r14 0
r15 0x1
rip 0xffffffff82289575 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002cccb740
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb> show proc
PROC (syz-executor) tid=158768 pid=11311 tcnt=2 stat=onproc
flags process=0 proc=0
runpri=50, usrpri=50, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002f0d1a28,0xffff80002f0d1270
process=0xffff8000fffefaa0 user=0xffff80002ccc6000, vmspace=0xfffffd807c59c748
estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=0, intr=1
ddb> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*11311 158768 59335 0 7 0 syz-executor
11311 40984 59335 0 2 0x4000000 syz-executor
8479 344792 36168 0 2 0 syz-executor
8479 488349 36168 0 3 0x4000080 fsleep syz-executor
8479 38671 36168 0 2 0x4000000 syz-executor
49871 351583 65627 0 2 0 syz-executor
49871 318109 65627 0 3 0x4000080 fsleep syz-executor
49871 329211 65627 0 3 0x4000080 fsleep syz-executor
80012 43573 83062 0 2 0x1 syz-executor
80012 172966 83062 0 3 0x4000080 fsleep syz-executor
80012 418732 83062 0 3 0x4000080 fsleep syz-executor
42348 47792 98346 0 3 0x80 nanoslp syz-executor
42348 413886 98346 0 3 0x4000080 fsleep syz-executor
42348 144537 98346 0 3 0x4000080 fsleep syz-executor
46540 178655 74528 0 2 0x1 syz-executor
46540 223709 74528 0 3 0x4000080 fsleep syz-executor
54545 203299 65835 0 3 0x80 nanoslp syz-executor
54545 390870 65835 0 3 0x4000080 sbwait syz-executor
54545 281924 65835 0 3 0x4000080 fsleep syz-executor
54545 204406 65835 0 3 0x4000080 fsleep syz-executor
3883 387353 0 0 3 0x14280 nfsidl nfsio
18100 376510 0 0 3 0x14280 nfsidl nfsio
33896 412769 0 0 3 0x14280 nfsidl nfsio
84645 416041 0 0 3 0x14280 nfsidl nfsio
86601 124810 0 0 3 0x14280 nfsidl nfsio
60343 154141 0 0 3 0x14280 nfsidl nfsio
89104 88148 0 0 3 0x14280 nfsidl nfsio
9522 262685 0 0 3 0x14280 nfsidl nfsio
8857 460036 0 0 3 0x14280 nfsidl nfsio
187 244597 0 0 3 0x14280 nfsidl nfsio
79149 424333 0 0 3 0x14280 nfsidl nfsio
13152 129721 0 0 3 0x14280 nfsidl nfsio
14210 197477 0 0 3 0x14280 nfsidl nfsio
80969 290045 0 0 3 0x14280 nfsidl nfsio
53988 387555 0 0 3 0x14280 nfsidl nfsio
67629 262189 0 0 3 0x14280 nfsidl nfsio
39929 295899 0 0 3 0x14280 nfsidl nfsio
6429 172287 0 0 3 0x14280 nfsidl nfsio
37946 461791 0 0 3 0x14280 nfsidl nfsio
34505 487025 0 0 3 0x14280 nfsidl nfsio
50371 362841 3745 0 3 0x82 sbwait sshd-session
98346 393910 9308 0 3 0x82 nanoslp syz-executor
65627 249180 9308 0 3 0x82 nanoslp syz-executor
36168 293402 9308 0 3 0x82 nanoslp syz-executor
83062 274083 9308 0 3 0x82 nanoslp syz-executor
65835 438953 9308 0 3 0x82 nanoslp syz-executor
59335 461881 9308 0 3 0x82 nanoslp syz-executor
7848 149096 9308 0 2 0x3 syz-executor
74528 350088 9308 0 3 0x82 nanoslp syz-executor
9308 102177 12414 0 2 0x3 syz-executor
12414 58045 3734 0 3 0x10008a sigsusp ksh
3734 128167 54191 0 3 0x98 kqread sshd-session
54191 136930 3745 0 3 0x92 kqread sshd-session
65427 393864 1 0 3 0x100083 ttyopn getty
3745 289409 1 0 3 0x88 kqread sshd
41933 426454 42568 73 3 0x1100090 kqread syslogd
42568 171255 1 0 3 0x100082 sbwait syslogd
37767 316593 1 0 3 0x100080 kqread resolvd
42912 382519 88017 77 3 0x100092 kqread dhcpleased
59336 143029 88017 77 3 0x100092 kqread dhcpleased
88017 132906 1 0 3 0x80 kqread dhcpleased
554 222701 0 0 3 0x14200 bored smr
61828 204950 0 0 2 0x14200 zerothread
68518 193053 0 0 3 0x14200 aiodoned aiodoned
2845 404852 0 0 3 0x14200 syncer update
60390 52310 0 0 3 0x14200 cleaner cleaner
41107 236025 0 0 3 0x14200 reaper reaper
27791 357511 0 0 3 0x14200 pgdaemon pagedaemon
63922 474139 0 0 3 0x14200 bored viomb
85078 514845 0 0 3 0x40014200 acpi0 acpi0
25276 375899 0 0 2 0x14200 softnet0
90574 209281 0 0 3 0x14200 bored systqmp
26851 461407 0 0 3 0x14200 bored systq
12224 195359 0 0 3 0x40014200 tmoslp softclock
83578 331300 0 0 3 0x40014200 idle0
1 226883 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb> show all locks
No such command
ddb> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11066 12111K 12519K 166960K 13913 0
pcb 17 14K 15K 166960K 294 0
rtable 243 10K 10K 166960K 805 0
pf 36 14K 16K 166960K 102 0
ifaddr 41 7K 8K 166960K 87 0
ifgroup 54 2K 2K 166960K 134 0
sysctl 4 1K 9K 166960K 13 0
counters 34 17K 18K 166960K 212 0
ioctlops 0 0K 4K 166960K 488 0
iov 0 0K 24K 166960K 85 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1378 87K 87K 166960K 2240 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 19 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 50 0
dirhash 12 2K 2K 166960K 30 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 97K 166960K 930 0
sigio 0 0K 0K 166960K 18 0
proc 60 59K 124K 166960K 562 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 111 0
in_multi 89 6K 7K 166960K 154 0
ether_multi 1 0K 0K 166960K 10 0
mrt 1 0K 0K 166960K 24 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 235 1049K 1049K 166960K 235 0
exec 0 0K 1K 166960K 509 0
fusefs mount 1 32K 32K 166960K 1 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 235 161K 181K 166960K 10105 0
UVM aobj 59 12K 12K 166960K 63 0
pinsyscall 40 80K 96K 166960K 2086 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 2K 166960K 48 0
NDP 12 0K 2K 166960K 56 0
temp 80 9076K 9334K 166960K 31784 0
kqueue 13 20K 28K 166960K 142 0
SYN cache 2 16K 16K 166960K 2 0
ddb> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb 120 123 0 120 1 0 1 1 0 8 0
rtentry 136 236 0 138 4 0 4 4 0 8 0
unpcb 144 1127 0 1104 7 1 6 6 0 8 5
syncache 336 16 0 16 2 1 1 1 0 8 1
tcpqe 32 10 0 10 2 1 1 1 0 8 1
tcpcb 736 422 0 407 11 3 8 8 0 8 6
arp 96 53 0 35 1 0 1 1 0 8 0
ipq 40 7 0 1 1 0 1 1 0 8 0
ipqe 40 9 0 3 1 0 1 1 0 8 0
inpcb 328 1089 0 1070 12 4 8 8 0 8 6
ip6q 72 7 0 2 1 0 1 1 0 8 0
ip6af 40 11 0 6 1 0 1 1 0 8 0
nd6 112 29 0 6 1 0 1 1 0 8 0
pkpcb 40 4 0 4 2 1 1 1 0 8 1
kcovpl 48 8 0 0 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1072 170 0 170 1 0 1 1 0 8 1
pppxif 1384 71 0 71 2 1 1 1 0 8 1
pfrktable 1344 2 0 2 1 1 0 1 0 8 0
pfqueue 320 1 0 1 1 1 0 1 0 8 0
pfstitem 24 5 0 0 1 0 1 1 0 8 0
pfstkey 128 7 0 4 1 0 1 1 0 8 0
pfstate 384 5 0 2 1 0 1 1 0 8 0
pfrule 1360 2 0 2 1 1 0 1 0 8 0
rttmr 136 1 0 1 1 0 1 1 0 8 1
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 743 0 326 39 10 29 39 0 8 0
art_table 40 746 0 326 7 1 6 7 0 8 0
art_node 32 234 0 145 2 0 2 2 0 8 0
sysvmsgpl 40 9 0 8 1 0 1 1 0 8 0
semupl 112 2 0 2 2 1 1 1 0 8 1
semapl 112 45 0 35 1 0 1 1 0 8 0
shmpl 112 54 0 3 2 0 2 2 0 8 0
dirhash 1024 30 0 13 3 0 3 3 0 8 0
dino2pl 256 3202 0 1756 92 0 92 92 0 8 0
ffsino 256 3202 0 1756 92 0 92 92 0 8 0
nchpl 144 4500 0 2808 64 0 64 64 0 8 0
rtmask 32 11 0 11 2 1 1 1 0 8 1
vnodes 216 3764 0 0 210 0 210 210 0 8 0
namei 1024 16462 0 16462 2 1 1 2 0 8 1
vcpupl 3904 6 0 1 1 0 1 1 0 8 0
vmpool 808 6 0 1 1 0 1 1 0 8 0
kstatmem 264 80 0 56 3 1 2 3 0 8 0
acpiwqpl 32 1 0 1 1 0 1 1 1 8 1
scsiplug 72 3 0 3 1 1 0 1 0 8 0
scxspl 216 16791 0 16791 9 7 2 8 1 8 2
plimitpl 152 390 0 374 1 0 1 1 0 8 0
sigapl 424 1257 0 1194 8 0 8 8 0 8 0
knotepl 120 46406 0 46358 21 9 12 15 0 8 8
kqueuepl 184 323 0 314 4 3 1 4 0 8 0
pipepl 304 353 0 326 12 5 7 8 0 8 4
fdescpl 448 1223 0 1193 5 1 4 5 0 8 0
filepl 120 9276 0 9047 19 4 15 15 0 8 7
lockfpl 104 344 0 342 1 0 1 1 0 8 0
lockfspl 48 131 0 129 1 0 1 1 0 8 0
sessionpl 144 34 0 25 1 0 1 1 0 8 0
pgrppl 48 52 0 35 1 0 1 1 0 8 0
ucredpl 104 1286 0 1275 1 0 1 1 0 8 0
zombiepl 144 1323 0 1323 1 0 1 1 0 8 1
processpl 1152 1257 0 1194 5 0 5 5 0 8 0
procpl 664 2575 0 2499 8 0 8 8 0 8 1
sosppl 176 6 0 6 2 1 1 1 0 8 1
sockpl 552 2439 0 2394 16 4 12 13 0 8 8
mcl64k 65536 40 0 39 2 1 1 1 0 8 0
mcl16k 16384 3 0 3 2 1 1 1 0 8 1
mcl12k 12288 2 0 2 1 1 0 1 0 8 0
mcl8k 8192 15 0 15 2 1 1 1 0 8 1
mcl4k 4096 3543 0 3485 16 8 8 15 0 8 0
mcl4k: pool(0xffffffff83955a10:mcl4k): free list modified: page 0xfffffd806d3bf000; item ordinal 0; addr 0xfffffd806d3bf000 (p 0xfffffd8078ae8000); offset 0x0=0x11e57ed0
pool(mcl4k): free list modified: page 0xfffffd806d3bf000; item ordinal 0; addr 0xfffffd806d3bf000 (p 0xfffffd8078ae8000); offset 0x0=0x0
mcl4k: pool(0xffffffff83955a10:mcl4k): page inconsistency: page 0xfffffd806d3bf000; item ordinal 1; addr 0xe9dbda04c2dc17ae
mcl2k 2048 1213 0 1205 4 2 2 3 0 8 1
mtagpl 96 20 0 9 1 0 1 1 0 8 0
mbufpl 256 17841 0 17614 149 129 20 88 0 8 1
bufpl 280 5265 0 111 369 0 369 369 0 8 0
anonpl 24 196792 0 191373 60 25 35 58 0 187 0
amapchunkpl 152 34242 0 33617 38 11 27 32 0 158 1
amappl16 200 3215 0 3183 24 20 4 20 0 8 0
amappl15 192 19 0 19 1 1 0 1 0 8 0
amappl14 184 426 0 425 1 0 1 1 0 8 0
amappl13 176 137 0 126 1 0 1 1 0 8 0
amappl12 168 1472 0 1443 2 0 2 2 0 8 0
amappl11 160 10 0 10 1 1 0 1 0 8 0
amappl10 152 59 0 49 1 0 1 1 0 8 0
amappl9 144 267 0 265 1 0 1 1 0 8 0
amappl8 136 94 0 93 1 0 1 1 0 8 0
amappl7 128 127 0 125 1 0 1 1 0 8 0
amappl6 120 257 0 245 1 0 1 1 0 8 0
amappl5 112 98 0 90 1 0 1 1 0 8 0
amappl4 104 548 0 510 2 0 2 2 0 8 0
amappl3 96 5928 0 5835 3 0 3 3 0 8 0
amappl2 88 1371 0 1304 2 0 2 2 0 8 0
amappl1 80 16018 0 15385 15 0 15 15 0 8 0
amappl 88 9205 0 9039 5 0 5 5 0 92 0
uvmvnodes 80 121 0 0 3 0 3 3 0 8 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 7 0 7 1 1 0 1 0 8 0
dma128 128 254 0 254 1 1 0 1 0 8 0
dma64 64 7 0 7 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 62 0 4 2 0 2 2 0 8 0
uaddrrnd 24 1223 0 1193 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1223 0 1193 1 0 1 1 0 8 0
vmmpekpl 168 12972 0 12942 2 0 2 2 0 8 0
vmmpepl 168 87996 0 86037 103 9 94 103 0 357 5
vmsppl 368 1222 0 1193 4 1 3 4 0 8 0
rwobjpl 40 26333 0 25192 15 1 14 15 0 8 0
pdppl 4096 2464 0 2393 118 45 73 82 0 8 2
pvpl 32 553622 0 541503 146 33 113 136 0 265 10
pmappl 216 1228 0 1194 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 552 0 208 13 2 11 13 0 8 0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: -9
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83448e88) at panic+0x1cf sys/kern/subr_prf.c:198
pool_do_get(ffffffff83955a10,2,ffff80002cccb8e8) at pool_do_get+0x574 sys/kern/subr_pool.c:747
pool_get(ffffffff83955a10,2) at pool_get+0x11a sys/kern/subr_pool.c:-1
m_clget(0,2,1000) at m_clget+0x354 sys/kern/uipc_mbuf.c:-1
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 vio_add_rx_mbuf sys/dev/pv/if_vio.c:-1 [inline]
vio_populate_rx_mbufs(ffff8000002a2000,ffff80000002fc00) at vio_populate_rx_mbufs+0x197 sys/dev/pv/if_vio.c:1485
vio_rx_intr(ffff8000002a3000) at vio_rx_intr+0xc9 sys/dev/pv/if_vio.c:1645
intr_handler(ffff80002cccbac0,ffff8000002a1600) at intr_handler+0xcb sys/arch/amd64/amd64/intr.c:-1
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x747745cf35e0, count: -9
---
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