panic: pool_cache_item_magic_chWeARcNkI: NGm:b uSfPplL NcOpTu LfOreWEeR lEDi sOtN mSoYdSiCfAiLeLd : 13i6t e-m1 ADDRr0
0 views
Skip to first unread message
syzbot
Jun 23, 2020, 4:23:14 PM6/23/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 8569c6f6 Enable MPSAFE start routine to keep encryption wo..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=179b4595100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=8785ff506b68ebd135e9
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+8785ff...@syzkaller.appspotmail.com
panic: pool_cache_item_magic_chWeARcNkI: NGm:b uSfPplL NcOpTu LfOreWEeR lEDi sOtN mSoYdSiCfAiLeLd : 13i6t e-m1 5a5d1d2r0 0ExXfIffT ff0d 98
0
6aStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*260236 94277 0 0x2 0 0 syz-executor.1
158771 52341 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffda280, count: 14
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 0xfffffd806a645100+16 0x0!=0x50dda3452e73499c
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffda280, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800023101b80
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff819672cf kprintf+0x16f
r9 0x1
r10 0x2
r11 0x292f3cab91a714a3
r12 0
r13 0
r14 0xffff800020dfd398
r15 0
rip 0xffffffff813223f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800023101b00
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=260236 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ddc9c8,0xffff800020dfc298
process=0xffff800020df0f70 user=0xffff8000230fc000, vmspace=0xfffffd807f000a10
estcpu=36, cpticks=2, pctcpu=0.11
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
13707 219226 70822 0 2 0 syz-executor.0
*94277 260236 63363 0 7 0x2 syz-executor.1
70822 523221 63363 0 3 0x82 nanosleep syz-executor.0
63363 153503 75632 0 2 0x2 syz-fuzzer
63363 468372 75632 0 3 0x4000082 nanosleep syz-fuzzer
63363 90428 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 512292 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 350695 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 77506 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 501876 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 164797 75632 0 3 0x4000082 kqread syz-fuzzer
63363 435650 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 398531 75632 0 3 0x4000082 thrsleep syz-fuzzer
75632 510087 52341 0 3 0x10008a pause ksh
52341 158771 57174 0 7 0x12 sshd
93034 378442 1 0 3 0x100083 ttyin getty
57174 249708 1 0 3 0x80 select sshd
76131 202145 8721 74 3 0x100092 bpf pflogd
8721 277695 1 0 3 0x80 netio pflogd
37510 391875 84252 73 3 0x100090 kqread syslogd
84252 8610 1 0 3 0x100082 netio syslogd
43473 438133 1 77 3 0x100090 poll dhclient
28308 123994 1 0 3 0x80 poll dhclient
37683 258938 0 0 3 0x14200 bored smr
7841 510328 0 0 2 0x14200 zerothread
99475 313964 0 0 3 0x14200 aiodoned aiodoned
68286 391562 0 0 3 0x14200 syncer update
49577 204655 0 0 3 0x14200 cleaner cleaner
16712 102051 0 0 3 0x14200 reaper reaper
17438 109383 0 0 3 0x14200 pgdaemon pagedaemon
45772 249452 0 0 3 0x14200 bored crynlk
75626 378629 0 0 3 0x14200 bored crypto
38656 379860 0 0 3 0x40014200 acpi0 acpi0
79747 41249 0 0 3 0x40014200 idle1
27813 189769 0 0 3 0x14200 bored softnet
19536 363956 0 0 3 0x14200 bored systqmp
66349 260142 0 0 3 0x14200 bored systq
57338 313959 0 0 3 0x40014200 bored softclock
27725 60591 0 0 3 0x40014200 idle0
1 190710 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_xsh_runqueue+0x95 sys/scsi/scsi_base.c:582
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:473
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#11 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#12 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
Process 94277 (syz-executor.1) thread 0xffff800020dfd398 (260236)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828a6230)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ufs_mkdir+0x42e sys/ufs/ufs/ufs_vnops.c:1197
#10 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806e2aac48)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358
#5 ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80686975f0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_xsh_runqueue+0x95 sys/scsi/scsi_base.c:582
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:473
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#11 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#12 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
Process 52341 (sshd) thread 0xffff800020e4e4f0 (158771)
exclusive rwlock netlock r = 0 (0xffffffff826e83a8)
#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:543
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#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 9543 6987K 7110K 78643K 11084 0
pcb 13 8K 8K 78643K 37 0
rtable 102 3K 6K 78643K 300 0
ifaddr 55 12K 13K 78643K 90 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1495 0
iov 0 0K 12K 78643K 33 0
mount 1 1K 1K 78643K 1 0
vnodes 1223 77K 77K 78643K 1349 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 4 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 18 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 146 0
sigio 0 0K 0K 78643K 2 0
proc 61 63K 95K 78643K 445 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 38 0
in_multi 36 2K 2K 78643K 56 0
ether_multi 1 0K 0K 78643K 5 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 49 228K 228K 78643K 49 0
exec 0 0K 1K 78643K 219 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 118 39K 48K 78643K 1375 0
UVM aobj 9 2K 2K 78643K 9 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 20 0
NDP 8 0K 0K 78643K 15 0
temp 85 3849K 3913K 78643K 3057 0
kqueue 3 4K 10K 78643K 12 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 23 0 21 1 0 1 1 0 8 0
rtentry 112 50 0 9 2 0 2 2 0 8 0
unpcb 120 79 0 69 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 145 0 145 1 1 0 1 0 8 0
tcpcb 544 78 0 74 2 0 2 2 0 8 1
inpcb 296 177 0 170 2 0 2 2 0 8 1
nd6 48 8 0 4 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 0 1 1 0 8 1
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
pfrke_plain 160 4 0 4 1 0 1 1 0 8 1
pfrktable 1344 34 0 34 1 0 1 1 0 8 1
pfstitem 24 24 0 0 1 0 1 1 0 8 0
pfstkey 112 24 0 0 1 0 1 1 0 8 0
pfstate 328 24 0 0 2 0 2 2 0 8 0
pfrule 1360 27 0 22 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 218 0 46 13 0 13 13 0 8 0
art_table 32 219 0 46 2 0 2 2 0 8 0
art_node 16 49 0 11 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 4 1 0 1 1 0 8 0
semupl 112 3 0 3 1 0 1 1 0 8 1
semapl 112 10 0 0 1 0 1 1 0 8 0
shmpl 112 7 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1590 0 185 89 0 89 89 0 8 0
ffsino 272 1590 0 185 95 1 94 94 0 8 0
nchpl 144 1978 0 382 60 0 60 60 0 8 0
rtmask 32 8 0 8 1 0 1 1 0 8 1
uvmvnodes 72 1745 0 0 32 0 32 32 0 8 0
vnodes 208 1745 0 0 92 0 92 92 0 8 0
namei 1024 5381 0 5381 2 1 1 1 0 8 1
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 10 0 10 1 0 1 1 0 8 1
scsiplug 64 1 0 1 1 0 1 1 0 8 1
scxspl 192 5790 0 5790 9 2 7 7 0 8 7
plimitpl 152 22 0 14 1 0 1 1 0 8 0
sigapl 424 361 0 330 4 0 4 4 0 8 0
futexpl 56 2000 0 2000 1 0 1 1 0 8 1
knotepl 112 73 0 54 1 0 1 1 0 8 0
kqueuepl 144 30 0 28 1 0 1 1 0 8 0
pipelkpl 48 85 0 75 1 0 1 1 0 8 0
pipepl 120 170 0 151 1 0 1 1 0 8 0
fdescpl 496 346 0 330 3 0 3 3 0 8 0
filepl 152 1905 0 1805 6 1 5 5 0 8 1
lockfpl 104 42 0 41 1 0 1 1 0 8 0
lockfspl 48 16 0 15 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 156 0 147 1 0 1 1 0 8 0
zombiepl 144 330 0 330 2 1 1 1 0 8 1
processpl 984 361 0 330 6 1 5 5 0 8 0
procpl 624 602 0 562 4 0 4 4 0 8 0
sockpl 400 279 0 260 5 1 4 4 0 8 2
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 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 164 0 0 20 0 20 20 0 8 0
mtagpl 96 11 0 0 1 0 1 1 0 8 0
mbufpl 256 230 0 0 14 0 14 14 0 8 0
mbufpl: pool(0xffffffff828fd788:mbufpl): free list modified: page 0xfffffd8064b5d000; item ordinal 0; addr 0xfffffd8064b5dc00 (p 0xfffffd8065684000); offset 0x0=0x0
pool(mbufpl): free list modified: page 0xfffffd8064b5d000; item ordinal 0; addr 0xfffffd8064b5dc00 (p 0xfffffd8065684000); offset 0x0=0x0
mbufpl: pool(0xffffffff828fd788:mbufpl): page inconsistency: page 0xfffffd8064b5d000; item ordinal 1; addr 0x4ca4f8e038c752ce
bufpl 280 3541 0 132 244 0 244 244 0 8 0
anonpl 16 52852 0 36217 85 1 84 84 0 124 15
amapchunkpl 152 1861 0 1714 12 0 12 12 0 158 5
amappl16 192 1731 0 837 57 0 57 57 0 8 12
amappl15 184 116 0 113 3 2 1 1 0 8 0
amappl14 176 23 0 19 1 0 1 1 0 8 0
amappl13 168 31 0 27 1 0 1 1 0 8 0
amappl12 160 11 0 8 1 0 1 1 0 8 0
amappl11 152 52 0 37 1 0 1 1 0 8 0
amappl10 144 17 0 12 1 0 1 1 0 8 0
amappl9 136 372 0 371 1 0 1 1 0 8 0
amappl8 128 359 0 329 1 0 1 1 0 8 0
amappl7 120 118 0 107 1 0 1 1 0 8 0
amappl6 112 28 0 24 1 0 1 1 0 8 0
amappl5 104 270 0 252 1 0 1 1 0 8 0
amappl4 96 488 0 458 1 0 1 1 0 8 0
amappl3 88 108 0 103 1 0 1 1 0 8 0
amappl2 80 1928 0 1858 2 0 2 2 0 8 0
amappl1 72 17556 0 17113 23 12 11 18 0 8 1
amappl 80 859 0 814 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 8 0 0 1 0 1 1 0 8 0
uaddrrnd 24 348 0 330 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 348 0 330 1 0 1 1 0 8 0
vmmpekpl 168 6721 0 6687 2 0 2 2 0 8 0
vmmpepl 168 49162 0 47111 121 5 116 116 0 357 26
vmsppl 368 347 0 330 2 0 2 2 0 8 0
pdppl 4096 703 0 662 7 1 6 6 0 8 0
pvpl 32 165780 0 146017 200 0 200 200 0 265 36
pmappl 232 347 0 330 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 264 0 7 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffda280, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,61) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,61) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,61) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(61) at cnputc+0x4c sys/dev/cons.c:239
kputchar(61,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e98df) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e98df) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828fd788,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ad7760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eae6af8,9,fffffd8064b5e100,0,0,ffff800020e4e4f0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e3fa50, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,61) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,61) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,61) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(61) at cnputc+0x4c sys/dev/cons.c:239
kputchar(61,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e98df) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e98df) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828fd788,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ad7760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eae6af8,9,fffffd8064b5e100,0,0,ffff800020e4e4f0) at tcp_usrreq+0xa55
sosend(fffffd806eae6af8,0,ffff800020e3fb18,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e4e4f0,4,ffff800020e3fb18,0,ffff800020e3fc00) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e4e4f0,ffff800020e3fbb0,ffff800020e3fc00) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e3fc80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e3fc80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe0a60, count: -19
---
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: 8569c6f6 Enable MPSAFE start routine to keep encryption wo..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=179b4595100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=8785ff506b68ebd135e9
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+8785ff...@syzkaller.appspotmail.com
panic: pool_cache_item_magic_chWeARcNkI: NGm:b uSfPplL NcOpTu LfOreWEeR lEDi sOtN mSoYdSiCfAiLeLd : 13i6t e-m1 5a5d1d2r0 0ExXfIffT ff0d 98
0
6aStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*260236 94277 0 0x2 0 0 syz-executor.1
158771 52341 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffda280, count: 14
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 0xfffffd806a645100+16 0x0!=0x50dda3452e73499c
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffda280, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800023101b80
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff819672cf kprintf+0x16f
r9 0x1
r10 0x2
r11 0x292f3cab91a714a3
r12 0
r13 0
r14 0xffff800020dfd398
r15 0
rip 0xffffffff813223f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800023101b00
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=260236 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020ddc9c8,0xffff800020dfc298
process=0xffff800020df0f70 user=0xffff8000230fc000, vmspace=0xfffffd807f000a10
estcpu=36, cpticks=2, pctcpu=0.11
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
13707 219226 70822 0 2 0 syz-executor.0
*94277 260236 63363 0 7 0x2 syz-executor.1
70822 523221 63363 0 3 0x82 nanosleep syz-executor.0
63363 153503 75632 0 2 0x2 syz-fuzzer
63363 468372 75632 0 3 0x4000082 nanosleep syz-fuzzer
63363 90428 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 512292 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 350695 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 77506 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 501876 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 164797 75632 0 3 0x4000082 kqread syz-fuzzer
63363 435650 75632 0 3 0x4000082 thrsleep syz-fuzzer
63363 398531 75632 0 3 0x4000082 thrsleep syz-fuzzer
75632 510087 52341 0 3 0x10008a pause ksh
52341 158771 57174 0 7 0x12 sshd
93034 378442 1 0 3 0x100083 ttyin getty
57174 249708 1 0 3 0x80 select sshd
76131 202145 8721 74 3 0x100092 bpf pflogd
8721 277695 1 0 3 0x80 netio pflogd
37510 391875 84252 73 3 0x100090 kqread syslogd
84252 8610 1 0 3 0x100082 netio syslogd
43473 438133 1 77 3 0x100090 poll dhclient
28308 123994 1 0 3 0x80 poll dhclient
37683 258938 0 0 3 0x14200 bored smr
7841 510328 0 0 2 0x14200 zerothread
99475 313964 0 0 3 0x14200 aiodoned aiodoned
68286 391562 0 0 3 0x14200 syncer update
49577 204655 0 0 3 0x14200 cleaner cleaner
16712 102051 0 0 3 0x14200 reaper reaper
17438 109383 0 0 3 0x14200 pgdaemon pagedaemon
45772 249452 0 0 3 0x14200 bored crynlk
75626 378629 0 0 3 0x14200 bored crypto
38656 379860 0 0 3 0x40014200 acpi0 acpi0
79747 41249 0 0 3 0x40014200 idle1
27813 189769 0 0 3 0x14200 bored softnet
19536 363956 0 0 3 0x14200 bored systqmp
66349 260142 0 0 3 0x14200 bored systq
57338 313959 0 0 3 0x40014200 bored softclock
27725 60591 0 0 3 0x40014200 idle0
1 190710 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_xsh_runqueue+0x95 sys/scsi/scsi_base.c:582
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:473
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#11 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#12 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
Process 94277 (syz-executor.1) thread 0xffff800020dfd398 (260236)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828a6230)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ufs_mkdir+0x42e sys/ufs/ufs/ufs_vnops.c:1197
#10 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806e2aac48)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358
#5 ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394
#6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80686975f0)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 scsi_xsh_runqueue+0x95 sys/scsi/scsi_base.c:582
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:473
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ufs_mkdir+0x665 sys/ufs/ufs/ufs_vnops.c:1232
#11 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#12 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
Process 52341 (sshd) thread 0xffff800020e4e4f0 (158771)
exclusive rwlock netlock r = 0 (0xffffffff826e83a8)
#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:543
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#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 9543 6987K 7110K 78643K 11084 0
pcb 13 8K 8K 78643K 37 0
rtable 102 3K 6K 78643K 300 0
ifaddr 55 12K 13K 78643K 90 0
counters 43 33K 34K 78643K 47 0
ioctlops 0 0K 4K 78643K 1495 0
iov 0 0K 12K 78643K 33 0
mount 1 1K 1K 78643K 1 0
vnodes 1223 77K 77K 78643K 1349 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 4 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 18 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 146 0
sigio 0 0K 0K 78643K 2 0
proc 61 63K 95K 78643K 445 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 38 0
in_multi 36 2K 2K 78643K 56 0
ether_multi 1 0K 0K 78643K 5 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 49 228K 228K 78643K 49 0
exec 0 0K 1K 78643K 219 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 118 39K 48K 78643K 1375 0
UVM aobj 9 2K 2K 78643K 9 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 20 0
NDP 8 0K 0K 78643K 15 0
temp 85 3849K 3913K 78643K 3057 0
kqueue 3 4K 10K 78643K 12 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 23 0 21 1 0 1 1 0 8 0
rtentry 112 50 0 9 2 0 2 2 0 8 0
unpcb 120 79 0 69 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 145 0 145 1 1 0 1 0 8 0
tcpcb 544 78 0 74 2 0 2 2 0 8 1
inpcb 296 177 0 170 2 0 2 2 0 8 1
nd6 48 8 0 4 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 0 1 1 0 8 1
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
pfrke_plain 160 4 0 4 1 0 1 1 0 8 1
pfrktable 1344 34 0 34 1 0 1 1 0 8 1
pfstitem 24 24 0 0 1 0 1 1 0 8 0
pfstkey 112 24 0 0 1 0 1 1 0 8 0
pfstate 328 24 0 0 2 0 2 2 0 8 0
pfrule 1360 27 0 22 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 218 0 46 13 0 13 13 0 8 0
art_table 32 219 0 46 2 0 2 2 0 8 0
art_node 16 49 0 11 1 0 1 1 0 8 0
sysvmsgpl 40 12 0 4 1 0 1 1 0 8 0
semupl 112 3 0 3 1 0 1 1 0 8 1
semapl 112 10 0 0 1 0 1 1 0 8 0
shmpl 112 7 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1590 0 185 89 0 89 89 0 8 0
ffsino 272 1590 0 185 95 1 94 94 0 8 0
nchpl 144 1978 0 382 60 0 60 60 0 8 0
rtmask 32 8 0 8 1 0 1 1 0 8 1
uvmvnodes 72 1745 0 0 32 0 32 32 0 8 0
vnodes 208 1745 0 0 92 0 92 92 0 8 0
namei 1024 5381 0 5381 2 1 1 1 0 8 1
percpumem 16 34 0 2 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 10 0 10 1 0 1 1 0 8 1
scsiplug 64 1 0 1 1 0 1 1 0 8 1
scxspl 192 5790 0 5790 9 2 7 7 0 8 7
plimitpl 152 22 0 14 1 0 1 1 0 8 0
sigapl 424 361 0 330 4 0 4 4 0 8 0
futexpl 56 2000 0 2000 1 0 1 1 0 8 1
knotepl 112 73 0 54 1 0 1 1 0 8 0
kqueuepl 144 30 0 28 1 0 1 1 0 8 0
pipelkpl 48 85 0 75 1 0 1 1 0 8 0
pipepl 120 170 0 151 1 0 1 1 0 8 0
fdescpl 496 346 0 330 3 0 3 3 0 8 0
filepl 152 1905 0 1805 6 1 5 5 0 8 1
lockfpl 104 42 0 41 1 0 1 1 0 8 0
lockfspl 48 16 0 15 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 156 0 147 1 0 1 1 0 8 0
zombiepl 144 330 0 330 2 1 1 1 0 8 1
processpl 984 361 0 330 6 1 5 5 0 8 0
procpl 624 602 0 562 4 0 4 4 0 8 0
sockpl 400 279 0 260 5 1 4 4 0 8 2
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 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 164 0 0 20 0 20 20 0 8 0
mtagpl 96 11 0 0 1 0 1 1 0 8 0
mbufpl 256 230 0 0 14 0 14 14 0 8 0
mbufpl: pool(0xffffffff828fd788:mbufpl): free list modified: page 0xfffffd8064b5d000; item ordinal 0; addr 0xfffffd8064b5dc00 (p 0xfffffd8065684000); offset 0x0=0x0
pool(mbufpl): free list modified: page 0xfffffd8064b5d000; item ordinal 0; addr 0xfffffd8064b5dc00 (p 0xfffffd8065684000); offset 0x0=0x0
mbufpl: pool(0xffffffff828fd788:mbufpl): page inconsistency: page 0xfffffd8064b5d000; item ordinal 1; addr 0x4ca4f8e038c752ce
bufpl 280 3541 0 132 244 0 244 244 0 8 0
anonpl 16 52852 0 36217 85 1 84 84 0 124 15
amapchunkpl 152 1861 0 1714 12 0 12 12 0 158 5
amappl16 192 1731 0 837 57 0 57 57 0 8 12
amappl15 184 116 0 113 3 2 1 1 0 8 0
amappl14 176 23 0 19 1 0 1 1 0 8 0
amappl13 168 31 0 27 1 0 1 1 0 8 0
amappl12 160 11 0 8 1 0 1 1 0 8 0
amappl11 152 52 0 37 1 0 1 1 0 8 0
amappl10 144 17 0 12 1 0 1 1 0 8 0
amappl9 136 372 0 371 1 0 1 1 0 8 0
amappl8 128 359 0 329 1 0 1 1 0 8 0
amappl7 120 118 0 107 1 0 1 1 0 8 0
amappl6 112 28 0 24 1 0 1 1 0 8 0
amappl5 104 270 0 252 1 0 1 1 0 8 0
amappl4 96 488 0 458 1 0 1 1 0 8 0
amappl3 88 108 0 103 1 0 1 1 0 8 0
amappl2 80 1928 0 1858 2 0 2 2 0 8 0
amappl1 72 17556 0 17113 23 12 11 18 0 8 1
amappl 80 859 0 814 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 8 0 0 1 0 1 1 0 8 0
uaddrrnd 24 348 0 330 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 348 0 330 1 0 1 1 0 8 0
vmmpekpl 168 6721 0 6687 2 0 2 2 0 8 0
vmmpepl 168 49162 0 47111 121 5 116 116 0 357 26
vmsppl 368 347 0 330 2 0 2 2 0 8 0
pdppl 4096 703 0 662 7 1 6 6 0 8 0
pvpl 32 165780 0 146017 200 0 200 200 0 265 36
pmappl 232 347 0 330 2 0 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 264 0 7 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffda280, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,61) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,61) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,61) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(61) at cnputc+0x4c sys/dev/cons.c:239
kputchar(61,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e98df) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e98df) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828fd788,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ad7760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eae6af8,9,fffffd8064b5e100,0,0,ffff800020e4e4f0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e3fa50, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,61) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,61) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,61) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(61) at cnputc+0x4c sys/dev/cons.c:239
kputchar(61,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052
panic(ffffffff823e98df) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823e98df) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828fd788) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828fd788,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8064b5d000,264,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000ad7760) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eae6af8,9,fffffd8064b5e100,0,0,ffff800020e4e4f0) at tcp_usrreq+0xa55
sosend(fffffd806eae6af8,0,ffff800020e3fb18,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e4e4f0,4,ffff800020e3fb18,0,ffff800020e3fc00) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e4e4f0,ffff800020e3fbb0,ffff800020e3fc00) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e3fc80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e3fc80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe0a60, count: -19
---
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.
Anton Lindqvist
Jun 24, 2020, 2:38:34 AM6/24/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
Reply all
Reply to author
Forward
0 new messages