panic: pool_cache_item_mapgaincic_:ch ekecrkn: elm budfiaplg nocsptu ifc reaes sleirsttio mn od"!if_ikeedr:ne ilt_lemo c
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syzbot
May 17, 2020, 8:20:16 AM5/17/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 487c6a4b Get memory information from the device tree.
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=108d1776100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=61d13019aeed6011f607
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+61d130...@syzkaller.appspotmail.com
panic: pool_cache_item_mapgaincic_:ch ekecrkn: elm budfiaplg nocsptu ifc reaes sleirsttio mn od"!if_ikeedr:ne ilt_lemo cka_hddelrd (0)xf"ff fffaidl8e06d:8 ef8il1eb 0"0/+s16yz k0axl0l!e=0rx/m22a9ncag6bear3s/5bm4ul8t81ic5o5r
e/Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
238103 95809 0 0 0x4000000 1 syz-executor.1
* 10152 30975 0 0 0x4000000 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810
ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736
udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236
sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfd659630ab0, count: 2
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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8068e81b00+16 0x0!=0x229c6ba35b488155
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810
ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736
udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236
sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfd659630ab0, count: -13
ddb{0}> show registers
rdi 0xffffffff817718b7 db_enter+0x17
rsi 0x78dc __ALIGN_SIZE+0x68dc
rbp 0xffff800023187620
rbx 0xffff8000231876d0
rdx 0x78dd __ALIGN_SIZE+0x68dd
rcx 0xffff800020f72000
rax 0xffff800020f72000
r8 0xffffffff8136065f kprintf+0x16f
r9 0x1
r10 0x2
r11 0xa1264cdc3a1afd6b
r12 0x3000000008
r13 0xffff800023187630
r14 0x100
r15 0x1
rip 0xffffffff817718b8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800023187610
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=10152 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ec6c48,0xffff800020ec6028
process=0xffff800020e92ba8 user=0xffff800023182000, vmspace=0xfffffd807f0008a0
estcpu=36, cpticks=7, pctcpu=0.0
user=0, sys=2, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
95809 242746 48444 0 2 0 syz-executor.1
95809 238103 48444 0 7 0x4000000 syz-executor.1
30975 500394 64692 0 2 0 syz-executor.0
*30975 10152 64692 0 7 0x4000000 syz-executor.0
70430 210873 0 0 3 0x14200 bored sosplice
48444 350673 53095 0 3 0x82 nanosleep syz-executor.1
64692 320720 53095 0 3 0x82 nanosleep syz-executor.0
53095 25743 66944 0 3 0x82 thrsleep syz-fuzzer
53095 423466 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 189674 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 490459 66944 0 3 0x4000082 kqread syz-fuzzer
53095 294815 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 194630 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 347606 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 177281 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 508259 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 421349 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 511420 66944 0 3 0x4000082 thrsleep syz-fuzzer
66944 484666 70351 0 3 0x10008a pause ksh
70351 229382 15950 0 3 0x92 select sshd
72719 487189 1 0 3 0x100083 ttyin getty
15950 215115 1 0 3 0x80 select sshd
14228 345600 92529 74 3 0x100092 bpf pflogd
92529 359695 1 0 3 0x80 netio pflogd
29601 42136 96937 73 3 0x100090 kqread syslogd
96937 27125 1 0 3 0x100082 netio syslogd
33521 50337 1 77 3 0x100090 poll dhclient
97859 72608 1 0 3 0x80 poll dhclient
60576 110894 0 0 3 0x14200 bored smr
61956 386441 0 0 2 0x14200 zerothread
78131 113619 0 0 3 0x14200 aiodoned aiodoned
67353 64128 0 0 3 0x14200 syncer update
19963 450001 0 0 3 0x14200 cleaner cleaner
85928 473425 0 0 3 0x14200 reaper reaper
60329 394435 0 0 3 0x14200 pgdaemon pagedaemon
84259 283489 0 0 3 0x14200 bored crynlk
17983 14672 0 0 3 0x14200 bored crypto
18108 2157 0 0 3 0x40014200 acpi0 acpi0
14202 389691 0 0 3 0x40014200 idle1
8633 104372 0 0 3 0x14200 bored softnet
9234 464225 0 0 3 0x14200 bored systqmp
30105 44675 0 0 3 0x14200 bored systq
46723 464241 0 0 3 0x40014200 bored softclock
41176 134400 0 0 3 0x40014200 idle0
1 477621 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 30975 (syz-executor.0) thread 0xffff800020ec69d8 (10152)
exclusive rwlock netlock r = 0 (0xffffffff824a2978)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 sendit+0x52b sys/kern/uipc_syscalls.c:657
#4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9520 6424K 6940K 78643K 10985 0
pcb 13 8K 8K 78643K 58 0
rtable 96 3K 4K 78643K 274 0
ifaddr 69 13K 14K 78643K 104 0
counters 43 33K 34K 78643K 53 0
ioctlops 0 0K 4K 78643K 1487 0
iov 0 0K 16K 78643K 28 0
mount 1 1K 1K 78643K 1 0
vnodes 1220 77K 77K 78643K 1319 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 6 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 30 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 6 17K 25K 78643K 205 0
sigio 0 0K 0K 78643K 18 0
proc 61 63K 83K 78643K 448 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 20 0
in_multi 32 2K 2K 78643K 69 0
ether_multi 1 0K 0K 78643K 6 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 227 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 125 39K 43K 78643K 1619 0
UVM aobj 13 7K 7K 78643K 19 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 28 0
NDP 12 0K 0K 78643K 23 0
temp 110 3044K 3116K 78643K 8687 0
kqueue 5 5K 8K 78643K 21 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 39 0 37 1 0 1 1 0 8 0
rtentry 112 54 0 16 2 0 2 2 0 8 0
unpcb 120 142 0 130 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 73 0 73 2 2 0 1 0 8 0
tcpcb 544 222 0 218 1 0 1 1 0 8 0
inpcb 280 441 0 432 2 0 2 2 0 8 1
nd6 48 9 0 7 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
pffrag 232 1 0 1 1 0 1 1 0 482 1
pffrnode 88 1 0 1 1 0 1 1 0 8 1
pffrent 40 45 0 45 1 0 1 1 0 8 1
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 33 0 4 1 0 1 1 0 8 0
pfstkey 112 33 0 4 1 0 1 1 0 8 0
pfstate 328 33 0 4 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 251 0 95 13 0 13 13 0 8 0
art_table 32 252 0 95 2 0 2 2 0 8 0
art_node 16 53 0 17 1 0 1 1 0 8 0
sysvmsgpl 40 10 0 10 1 1 0 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 22 0 12 1 0 1 1 0 8 0
shmpl 112 17 0 6 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1677 0 267 89 0 89 89 0 8 0
ffsino 272 1677 0 267 95 0 95 95 0 8 0
nchpl 144 2145 0 538 60 0 60 60 0 8 0
uvmvnodes 72 1792 0 0 33 0 33 33 0 8 0
vnodes 208 1792 0 0 95 0 95 95 0 8 0
namei 1024 5745 0 5745 1 0 1 1 0 8 1
percpumem 16 37 0 5 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 6 0 4 1 0 1 1 0 8 0
scxspl 192 5959 0 5959 6 4 2 5 0 8 2
plimitpl 152 31 0 23 1 0 1 1 0 8 0
sigapl 424 421 0 388 4 0 4 4 0 8 0
futexpl 56 3085 0 3085 1 0 1 1 0 8 1
knotepl 112 84 0 64 1 0 1 1 0 8 0
kqueuepl 144 47 0 44 1 0 1 1 0 8 0
pipelkpl 48 111 0 101 1 0 1 1 0 8 0
pipepl 120 222 0 203 1 0 1 1 0 8 0
fdescpl 496 405 0 388 3 0 3 3 0 8 0
filepl 152 2416 0 2311 5 0 5 5 0 8 0
lockfpl 104 59 0 58 1 0 1 1 0 8 0
lockfspl 48 22 0 21 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 22 0 11 1 0 1 1 0 8 0
ucredpl 96 161 0 151 1 0 1 1 0 8 0
zombiepl 144 388 0 388 1 0 1 1 0 8 1
processpl 984 421 0 388 5 0 5 5 0 8 0
procpl 624 834 0 789 5 0 5 5 0 8 1
sosppl 128 5 0 5 2 1 1 1 0 8 1
sockpl 400 624 0 601 5 0 5 5 0 8 2
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 4 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 169 0 0 21 0 21 21 0 8 0
mtagpl 80 40 0 0 1 0 1 1 0 8 0
mbufpl 256 281 0 0 17 0 17 17 0 8 0
bufpl 280 3772 0 135 260 0 260 260 0 8 0
anonpl 16 61063 0 47044 73 1 72 72 0 124 14
amapchunkpl 152 2145 0 2003 10 3 7 10 0 158 1
amappl16 192 2371 0 1626 53 9 44 49 0 8 6
amappl15 184 1 0 1 1 1 0 1 0 8 0
amappl14 176 24 0 19 1 0 1 1 0 8 0
amappl13 168 110 0 107 1 0 1 1 0 8 0
amappl12 160 9 0 4 1 0 1 1 0 8 0
amappl11 152 54 0 39 1 0 1 1 0 8 0
amappl10 144 31 0 23 1 0 1 1 0 8 0
amappl9 136 382 0 381 1 0 1 1 0 8 0
amappl8 128 347 0 315 2 0 2 2 0 8 0
amappl7 120 125 0 112 1 0 1 1 0 8 0
amappl6 112 22 0 19 2 1 1 1 0 8 0
amappl5 104 307 0 289 1 0 1 1 0 8 0
amappl4 96 569 0 540 1 0 1 1 0 8 0
amappl3 88 103 0 98 1 0 1 1 0 8 0
amappl2 80 2294 0 2215 2 0 2 2 0 8 0
amappl1 72 19005 0 18551 24 14 10 18 0 8 0
amappl 80 1089 0 1041 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 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 64 18 0 6 1 0 1 1 0 8 0
uaddrrnd 24 411 0 392 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 411 0 392 1 0 1 1 0 8 0
vmmpekpl 168 6924 0 6890 2 0 2 2 0 8 0
vmmpepl 168 56404 0 54393 111 12 99 104 0 357 11
vmsppl 368 410 0 392 2 0 2 2 0 8 0
pdppl 4096 830 0 786 6 0 6 6 0 8 0
pvpl 32 187048 0 169307 174 0 174 174 0 265 30
pmappl 232 410 0 392 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 266 0 3 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810
ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736
udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236
sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfd659630ab0, count: -13
ddb{0}> machine ddbcpu 1
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 487c6a4b Get memory information from the device tree.
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=108d1776100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=61d13019aeed6011f607
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+61d130...@syzkaller.appspotmail.com
panic: pool_cache_item_mapgaincic_:ch ekecrkn: elm budfiaplg nocsptu ifc reaes sleirsttio mn od"!if_ikeedr:ne ilt_lemo cka_hddelrd (0)xf"ff fffaidl8e06d:8 ef8il1eb 0"0/+s16yz k0axl0l!e=0rx/m22a9ncag6bear3s/5bm4ul8t81ic5o5r
e/Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
238103 95809 0 0 0x4000000 1 syz-executor.1
* 10152 30975 0 0 0x4000000 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810
ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736
udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236
sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfd659630ab0, count: 2
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{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8068e81b00+16 0x0!=0x229c6ba35b488155
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810
ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736
udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236
sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfd659630ab0, count: -13
ddb{0}> show registers
rdi 0xffffffff817718b7 db_enter+0x17
rsi 0x78dc __ALIGN_SIZE+0x68dc
rbp 0xffff800023187620
rbx 0xffff8000231876d0
rdx 0x78dd __ALIGN_SIZE+0x68dd
rcx 0xffff800020f72000
rax 0xffff800020f72000
r8 0xffffffff8136065f kprintf+0x16f
r9 0x1
r10 0x2
r11 0xa1264cdc3a1afd6b
r12 0x3000000008
r13 0xffff800023187630
r14 0x100
r15 0x1
rip 0xffffffff817718b8 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800023187610
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=10152 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=32, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ec6c48,0xffff800020ec6028
process=0xffff800020e92ba8 user=0xffff800023182000, vmspace=0xfffffd807f0008a0
estcpu=36, cpticks=7, pctcpu=0.0
user=0, sys=2, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
95809 242746 48444 0 2 0 syz-executor.1
95809 238103 48444 0 7 0x4000000 syz-executor.1
30975 500394 64692 0 2 0 syz-executor.0
*30975 10152 64692 0 7 0x4000000 syz-executor.0
70430 210873 0 0 3 0x14200 bored sosplice
48444 350673 53095 0 3 0x82 nanosleep syz-executor.1
64692 320720 53095 0 3 0x82 nanosleep syz-executor.0
53095 25743 66944 0 3 0x82 thrsleep syz-fuzzer
53095 423466 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 189674 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 490459 66944 0 3 0x4000082 kqread syz-fuzzer
53095 294815 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 194630 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 347606 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 177281 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 508259 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 421349 66944 0 3 0x4000082 thrsleep syz-fuzzer
53095 511420 66944 0 3 0x4000082 thrsleep syz-fuzzer
66944 484666 70351 0 3 0x10008a pause ksh
70351 229382 15950 0 3 0x92 select sshd
72719 487189 1 0 3 0x100083 ttyin getty
15950 215115 1 0 3 0x80 select sshd
14228 345600 92529 74 3 0x100092 bpf pflogd
92529 359695 1 0 3 0x80 netio pflogd
29601 42136 96937 73 3 0x100090 kqread syslogd
96937 27125 1 0 3 0x100082 netio syslogd
33521 50337 1 77 3 0x100090 poll dhclient
97859 72608 1 0 3 0x80 poll dhclient
60576 110894 0 0 3 0x14200 bored smr
61956 386441 0 0 2 0x14200 zerothread
78131 113619 0 0 3 0x14200 aiodoned aiodoned
67353 64128 0 0 3 0x14200 syncer update
19963 450001 0 0 3 0x14200 cleaner cleaner
85928 473425 0 0 3 0x14200 reaper reaper
60329 394435 0 0 3 0x14200 pgdaemon pagedaemon
84259 283489 0 0 3 0x14200 bored crynlk
17983 14672 0 0 3 0x14200 bored crypto
18108 2157 0 0 3 0x40014200 acpi0 acpi0
14202 389691 0 0 3 0x40014200 idle1
8633 104372 0 0 3 0x14200 bored softnet
9234 464225 0 0 3 0x14200 bored systqmp
30105 44675 0 0 3 0x14200 bored systq
46723 464241 0 0 3 0x40014200 bored softclock
41176 134400 0 0 3 0x40014200 idle0
1 477621 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 30975 (syz-executor.0) thread 0xffff800020ec69d8 (10152)
exclusive rwlock netlock r = 0 (0xffffffff824a2978)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 sendit+0x52b sys/kern/uipc_syscalls.c:657
#4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9520 6424K 6940K 78643K 10985 0
pcb 13 8K 8K 78643K 58 0
rtable 96 3K 4K 78643K 274 0
ifaddr 69 13K 14K 78643K 104 0
counters 43 33K 34K 78643K 53 0
ioctlops 0 0K 4K 78643K 1487 0
iov 0 0K 16K 78643K 28 0
mount 1 1K 1K 78643K 1 0
vnodes 1220 77K 77K 78643K 1319 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 6 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 30 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 6 17K 25K 78643K 205 0
sigio 0 0K 0K 78643K 18 0
proc 61 63K 83K 78643K 448 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 20 0
in_multi 32 2K 2K 78643K 69 0
ether_multi 1 0K 0K 78643K 6 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 227 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 125 39K 43K 78643K 1619 0
UVM aobj 13 7K 7K 78643K 19 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 28 0
NDP 12 0K 0K 78643K 23 0
temp 110 3044K 3116K 78643K 8687 0
kqueue 5 5K 8K 78643K 21 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 39 0 37 1 0 1 1 0 8 0
rtentry 112 54 0 16 2 0 2 2 0 8 0
unpcb 120 142 0 130 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 73 0 73 2 2 0 1 0 8 0
tcpcb 544 222 0 218 1 0 1 1 0 8 0
inpcb 280 441 0 432 2 0 2 2 0 8 1
nd6 48 9 0 7 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
pffrag 232 1 0 1 1 0 1 1 0 482 1
pffrnode 88 1 0 1 1 0 1 1 0 8 1
pffrent 40 45 0 45 1 0 1 1 0 8 1
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 33 0 4 1 0 1 1 0 8 0
pfstkey 112 33 0 4 1 0 1 1 0 8 0
pfstate 328 33 0 4 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 251 0 95 13 0 13 13 0 8 0
art_table 32 252 0 95 2 0 2 2 0 8 0
art_node 16 53 0 17 1 0 1 1 0 8 0
sysvmsgpl 40 10 0 10 1 1 0 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 22 0 12 1 0 1 1 0 8 0
shmpl 112 17 0 6 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1677 0 267 89 0 89 89 0 8 0
ffsino 272 1677 0 267 95 0 95 95 0 8 0
nchpl 144 2145 0 538 60 0 60 60 0 8 0
uvmvnodes 72 1792 0 0 33 0 33 33 0 8 0
vnodes 208 1792 0 0 95 0 95 95 0 8 0
namei 1024 5745 0 5745 1 0 1 1 0 8 1
percpumem 16 37 0 5 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 6 0 4 1 0 1 1 0 8 0
scxspl 192 5959 0 5959 6 4 2 5 0 8 2
plimitpl 152 31 0 23 1 0 1 1 0 8 0
sigapl 424 421 0 388 4 0 4 4 0 8 0
futexpl 56 3085 0 3085 1 0 1 1 0 8 1
knotepl 112 84 0 64 1 0 1 1 0 8 0
kqueuepl 144 47 0 44 1 0 1 1 0 8 0
pipelkpl 48 111 0 101 1 0 1 1 0 8 0
pipepl 120 222 0 203 1 0 1 1 0 8 0
fdescpl 496 405 0 388 3 0 3 3 0 8 0
filepl 152 2416 0 2311 5 0 5 5 0 8 0
lockfpl 104 59 0 58 1 0 1 1 0 8 0
lockfspl 48 22 0 21 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 22 0 11 1 0 1 1 0 8 0
ucredpl 96 161 0 151 1 0 1 1 0 8 0
zombiepl 144 388 0 388 1 0 1 1 0 8 1
processpl 984 421 0 388 5 0 5 5 0 8 0
procpl 624 834 0 789 5 0 5 5 0 8 1
sosppl 128 5 0 5 2 1 1 1 0 8 1
sockpl 400 624 0 601 5 0 5 5 0 8 2
mcl64k 65536 8 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 4 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 169 0 0 21 0 21 21 0 8 0
mtagpl 80 40 0 0 1 0 1 1 0 8 0
mbufpl 256 281 0 0 17 0 17 17 0 8 0
bufpl 280 3772 0 135 260 0 260 260 0 8 0
anonpl 16 61063 0 47044 73 1 72 72 0 124 14
amapchunkpl 152 2145 0 2003 10 3 7 10 0 158 1
amappl16 192 2371 0 1626 53 9 44 49 0 8 6
amappl15 184 1 0 1 1 1 0 1 0 8 0
amappl14 176 24 0 19 1 0 1 1 0 8 0
amappl13 168 110 0 107 1 0 1 1 0 8 0
amappl12 160 9 0 4 1 0 1 1 0 8 0
amappl11 152 54 0 39 1 0 1 1 0 8 0
amappl10 144 31 0 23 1 0 1 1 0 8 0
amappl9 136 382 0 381 1 0 1 1 0 8 0
amappl8 128 347 0 315 2 0 2 2 0 8 0
amappl7 120 125 0 112 1 0 1 1 0 8 0
amappl6 112 22 0 19 2 1 1 1 0 8 0
amappl5 104 307 0 289 1 0 1 1 0 8 0
amappl4 96 569 0 540 1 0 1 1 0 8 0
amappl3 88 103 0 98 1 0 1 1 0 8 0
amappl2 80 2294 0 2215 2 0 2 2 0 8 0
amappl1 72 19005 0 18551 24 14 10 18 0 8 0
amappl 80 1089 0 1041 2 0 2 2 0 84 0
dma4096 4096 1 0 1 1 1 0 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 64 18 0 6 1 0 1 1 0 8 0
uaddrrnd 24 411 0 392 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 411 0 392 1 0 1 1 0 8 0
vmmpekpl 168 6924 0 6890 2 0 2 2 0 8 0
vmmpepl 168 56404 0 54393 111 12 99 104 0 357 11
vmsppl 368 410 0 392 2 0 2 2 0 8 0
pdppl 4096 830 0 786 6 0 6 6 0 8 0
pvpl 32 187048 0 169307 174 0 174 174 0 265 30
pmappl 232 410 0 392 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 266 0 3 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810
ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736
udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236
sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfd659630ab0, count: -13
ddb{0}> machine ddbcpu 1
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot will keep track of this bug report. See:
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Anton Lindqvist
May 19, 2020, 2:31:36 AM5/19/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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