panic: poolW_AcRaNIcNheG:_i StPemL _NmaOTg iLcO_WcEhReEckD :O Nm buSYfSplCA cLLp u0 f13r6ee E XlIiTs t 0m 9o
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syzbot
May 17, 2020, 11:33:17 PM5/17/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 557f50be As done everywhere else, use a local version of M..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17080a02100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=65ccbb8d2525b9e36684
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+65ccbb...@syzkaller.appspotmail.com
panic: poolW_AcRaNIcNheG:_i StPemL _NmaOTg iLcO_WcEhReEckD :O Nm buSYfSplCA cLLp u0 f13r6ee E XlIiTs t 0m 9o
d
ifStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*406499 70060 0 0 0x4000000 0 syz-executor.0
362185 42161 0 0 0x4000000 1 syz-executor.1
savectx() at savectx+0xb1
end of kernel
end trace frame: 0xd04be41c740, 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 0xfffffd806a88fe00+16 0x0!=0xd92d11fb23b77030
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0xd04be41c740, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800022fcbeb0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x33
r8 0xffffffff81ecd59f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x5fb3c7ecd0ab3c34
r12 0
r13 0
r14 0xffff800020ec7398
r15 0
rip 0xffffffff81cc53f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800022fcbe30
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=406499 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=17, usrpri=74, nice=20
forw=0xffffffffffffffff, list=0xffff800020ec6c48,0xffffffff82678b88
process=0xffff800020e93b08 user=0xffff800022fc6000, vmspace=0xfffffd8064d91b90
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
70060 52854 53917 0 2 0 syz-executor.0
*70060 406499 53917 0 7 0x4000000 syz-executor.0
42161 385575 80070 0 2 0 syz-executor.1
42161 362185 80070 0 7 0x4000000 syz-executor.1
53917 367348 88230 0 3 0x82 nanosleep syz-executor.0
1719 123853 1 0 3 0x100083 ttyin getty
80070 507731 88230 0 3 0x82 nanosleep syz-executor.1
56900 205652 0 0 3 0x14200 acct acct
85145 469962 0 0 3 0x14200 bored sosplice
88230 465178 98798 0 3 0x82 thrsleep syz-fuzzer
88230 427710 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 66441 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 402969 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 413055 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 364477 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 375232 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 510306 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 484501 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 124679 98798 0 3 0x4000082 kqread syz-fuzzer
98798 279805 83360 0 3 0x10008a pause ksh
83360 87491 84400 0 3 0x92 select sshd
84400 73326 1 0 3 0x80 select sshd
51293 139693 54263 74 3 0x100092 bpf pflogd
54263 50955 1 0 3 0x80 netio pflogd
30696 230298 88552 73 3 0x100090 kqread syslogd
88552 63822 1 0 3 0x100082 netio syslogd
87543 159043 1 77 3 0x100090 poll dhclient
29159 152205 1 0 3 0x80 poll dhclient
37740 341548 0 0 3 0x14200 bored smr
49706 332355 0 0 2 0x14200 zerothread
64298 146063 0 0 3 0x14200 aiodoned aiodoned
47000 369773 0 0 3 0x14200 syncer update
98818 446287 0 0 3 0x14200 cleaner cleaner
23416 25865 0 0 3 0x14200 reaper reaper
28444 115852 0 0 3 0x14200 pgdaemon pagedaemon
63646 346766 0 0 3 0x14200 bored crynlk
7967 279408 0 0 3 0x14200 bored crypto
79275 366778 0 0 3 0x40014200 acpi0 acpi0
19032 93745 0 0 3 0x40014200 idle1
48400 512890 0 0 3 0x14200 bored softnet
29334 213683 0 0 3 0x14200 bored systqmp
1622 480205 0 0 3 0x14200 bored systq
16482 270956 0 0 3 0x40014200 bored softclock
38144 413798 0 0 3 0x40014200 idle0
1 243723 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_iopool_run+0x7d scsi_ioh_pending sys/scsi/scsi_base.c:405 [inline]
#3 scsi_iopool_run+0x7d sys/scsi/scsi_base.c:420
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 ufs_strategy+0x17c
#9 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#10 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#11 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:724
#12 ufs_direnter+0x8e3 sys/ufs/ufs/ufs_lookup.c:909
#13 ufs_mkdir+0x70b sys/ufs/ufs/ufs_vnops.c:1251
#14 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#15 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#16 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#16 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#17 Xsyscall+0x128
Process 70060 (syz-executor.0) thread 0xffff800020ec7398 (406499)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8263f188)
#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 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:724
#9 ufs_mkdir+0x6b7 sys/ufs/ufs/ufs_vnops.c:1248
#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 (0xfffffd80649f74d8)
#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+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#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 (0xfffffd80649f7b38)
#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_iopool_run+0x7d scsi_ioh_pending sys/scsi/scsi_base.c:405 [inline]
#3 scsi_iopool_run+0x7d sys/scsi/scsi_base.c:420
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 ufs_strategy+0x17c
#9 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#10 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#11 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:724
#12 ufs_direnter+0x8e3 sys/ufs/ufs/ufs_lookup.c:909
#13 ufs_mkdir+0x70b sys/ufs/ufs/ufs_vnops.c:1251
#14 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#15 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#16 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#16 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#17 Xsyscall+0x128
Process 42161 (syz-executor.1) thread 0xffff800020ec6c48 (362185)
exclusive rwlock netlock r = 0 (0xffffffff8253a638)
#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 9573 6514K 6996K 78643K 12864 0
pcb 13 8K 8K 78643K 205 0
rtable 95 4K 4K 78643K 700 0
ifaddr 108 20K 20K 78643K 329 0
counters 43 33K 34K 78643K 115 0
ioctlops 0 0K 4K 78643K 1554 0
iov 0 0K 16K 78643K 213 0
mount 1 1K 1K 78643K 1 0
vnodes 1227 77K 78K 78643K 2037 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 17 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 385 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 6 17K 25K 78643K 1303 0
sigio 0 0K 0K 78643K 12 0
proc 63 63K 95K 78643K 790 0
subproc 32 2K 2K 78643K 119 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 95 0
in_multi 119 5K 6K 78643K 264 0
ether_multi 1 0K 0K 78643K 32 0
mrt 0 0K 0K 78643K 4 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 73 334K 334K 78643K 73 0
exec 0 0K 1K 78643K 411 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 172 122K 122K 78643K 5629 0
UVM aobj 51 2K 3K 78643K 61 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 179 0
NDP 18 0K 1K 78643K 68 0
temp 156 3051K 3119K 78643K 44837 0
kqueue 3 4K 16K 78643K 52 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 20 0 14 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 107 0 105 1 0 1 1 0 8 0
rtentry 112 115 0 79 2 0 2 2 0 8 0
unpcb 120 805 0 794 1 0 1 1 0 8 0
syncache 264 24 0 24 9 9 0 1 0 8 0
tcpqe 32 175 0 175 4 4 0 1 0 8 0
tcpcb 544 438 0 434 1 0 1 1 0 8 0
inpcb 280 1300 0 1292 8 7 1 2 0 8 0
rttmr 72 2 0 2 2 2 0 1 0 8 0
nd6 48 24 0 17 1 0 1 1 0 8 0
pkpcb 40 12 0 12 4 4 0 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 8 0 8 5 5 0 1 0 8 0
pffrag 232 15 0 15 5 4 1 1 0 482 1
pffrnode 88 15 0 15 5 4 1 1 0 8 1
pffrent 40 376 0 376 5 4 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 24 126 0 83 1 0 1 1 0 8 0
pfstkey 112 126 0 83 2 0 2 2 0 8 0
pfstate 328 126 0 83 5 0 5 5 0 8 1
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 256 517 0 331 15 3 12 14 0 8 0
art_table 32 518 0 331 2 0 2 2 0 8 0
art_node 16 114 0 85 1 0 1 1 0 8 0
sysvmsgpl 40 31 0 24 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 379 0 369 1 0 1 1 0 8 0
shmpl 112 59 0 12 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 3255 0 1848 89 0 89 89 0 8 0
ffsino 272 3255 0 1848 97 2 95 95 0 8 0
nchpl 144 5254 0 3670 60 0 60 60 0 8 0
uvmvnodes 72 3857 0 0 71 0 71 71 0 8 0
vnodes 208 3857 0 0 203 0 203 203 0 8 0
namei 1024 17514 0 17514 2 1 1 1 0 8 1
percpumem 16 68 0 36 1 0 1 1 0 8 0
vcpupl 1984 12 0 0 2 0 2 2 0 8 0
vmpool 560 15 0 3 1 0 1 1 0 8 0
scsiplug 64 2 0 2 1 1 0 1 0 8 0
scxspl 192 15742 0 15742 10 9 1 7 0 8 1
plimitpl 152 113 0 105 1 0 1 1 0 8 0
sigapl 424 1506 0 1472 5 1 4 5 0 8 0
futexpl 56 19161 0 19161 2 1 1 1 0 8 1
knotepl 112 176 0 157 1 0 1 1 0 8 0
kqueuepl 144 200 0 198 1 0 1 1 0 8 0
pipelkpl 48 261 0 251 1 0 1 1 0 8 0
pipepl 120 522 0 503 1 0 1 1 0 8 0
fdescpl 496 1489 0 1472 3 0 3 3 0 8 0
filepl 152 10365 0 10261 7 2 5 6 0 8 0
lockfpl 104 326 0 324 1 0 1 1 0 8 0
lockfspl 48 120 0 118 1 0 1 1 0 8 0
sessionpl 112 24 0 13 1 0 1 1 0 8 0
pgrppl 48 30 0 19 1 0 1 1 0 8 0
ucredpl 96 944 0 934 1 0 1 1 0 8 0
zombiepl 144 1472 0 1472 1 0 1 1 0 8 1
processpl 984 1506 0 1472 5 0 5 5 0 8 0
procpl 624 4541 0 4496 4 0 4 4 0 8 0
srpgc 64 2 0 2 1 1 0 1 0 8 0
sosppl 128 27 0 27 6 6 0 1 0 8 0
sockpl 400 2230 0 2209 14 11 3 6 0 8 0
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl16k 16384 5 0 0 1 0 1 1 0 8 0
mcl12k 12288 12 0 0 2 0 2 2 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 16 0 0 2 0 2 2 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 167 0 0 20 0 20 20 0 8 0
mtagpl 80 84 0 0 2 0 2 2 0 8 0
mbufpl 256 503 0 0 28 0 28 28 0 8 0
mbufpl: pool(0xffffffff8267b130:mbufpl): free list modified: page 0xfffffd807b479000; item ordinal 0; addr 0xfffffd807b479b00 (p 0xfffffd806df96000); offset 0x0=0x37d4cd9c45965f00
bufpl 280 6967 0 723 447 0 447 447 0 8 0
anonpl 16 156478 0 142179 102 37 65 76 0 124 0
amapchunkpl 152 9958 0 9822 33 27 6 20 0 158 0
amappl16 192 7840 0 7006 75 32 43 53 0 8 0
amappl15 184 117 0 113 1 0 1 1 0 8 0
amappl14 176 29 0 24 1 0 1 1 0 8 0
amappl13 168 321 0 320 1 0 1 1 0 8 0
amappl12 160 471 0 468 1 0 1 1 0 8 0
amappl11 152 374 0 357 1 0 1 1 0 8 0
amappl10 144 148 0 141 1 0 1 1 0 8 0
amappl9 136 446 0 443 1 0 1 1 0 8 0
amappl8 128 609 0 553 2 0 2 2 0 8 0
amappl7 120 262 0 248 1 0 1 1 0 8 0
amappl6 112 88 0 82 1 0 1 1 0 8 0
amappl5 104 1679 0 1660 1 0 1 1 0 8 0
amappl4 96 885 0 851 1 0 1 1 0 8 0
amappl3 88 140 0 134 1 0 1 1 0 8 0
amappl2 80 10793 0 10711 2 0 2 2 0 8 0
amappl1 72 43127 0 42661 23 13 10 18 0 8 0
amappl 80 4887 0 4836 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 60 0 10 1 0 1 1 0 8 0
uaddrrnd 24 1504 0 1475 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1504 0 1475 1 0 1 1 0 8 0
vmmpekpl 168 15612 0 15580 2 0 2 2 0 8 0
vmmpepl 168 192098 0 189906 195 78 117 123 0 357 18
vmsppl 368 1503 0 1475 3 0 3 3 0 8 0
pdppl 4096 3016 0 2962 7 0 7 7 0 8 0
pvpl 32 453785 0 436737 233 72 161 182 0 265 16
pmappl 232 1503 0 1475 3 1 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 297 0 20 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: 0xd04be41c740, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,66) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(66) at cnputc+0x4c sys/dev/cons.c:239
kputchar(66,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fcd5a) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcd5a) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8267b130,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd8068ff8d00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd8068ff8d00,0,fffffd806f6e2ea8,20,0,fffffd806f6e2e38) at ip_output+0xfd7 sys/netinet/ip_output.c:499
end trace frame: 0xffff800022fc4bc0, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,66) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(66) at cnputc+0x4c sys/dev/cons.c:239
kputchar(66,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fcd5a) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcd5a) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8267b130,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd8068ff8d00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd8068ff8d00,0,fffffd806f6e2ea8,20,0,fffffd806f6e2e38) at ip_output+0xfd7 sys/netinet/ip_output.c:499
rip_output(fffffd8068ff8d00,fffffd807449b830,ffff800022fc4be8,ffff80002114a000) at rip_output+0x252 sys/netinet/raw_ip.c:289
rip_usrreq(fffffd807449b830,9,fffffd8068ff8d00,0,0,ffff800020ec6c48) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538
sosend(fffffd807449b830,0,ffff800022fc4d60,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec6c48,7,ffff800022fc4e40,0,ffff800022fc4f20) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec6c48,ffff800022fc4ed8,ffff800022fc4f20) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800022fc4fa0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800022fc4fa0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4de0489c9d0, count: -21
---
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: 557f50be As done everywhere else, use a local version of M..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17080a02100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=65ccbb8d2525b9e36684
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+65ccbb...@syzkaller.appspotmail.com
panic: poolW_AcRaNIcNheG:_i StPemL _NmaOTg iLcO_WcEhReEckD :O Nm buSYfSplCA cLLp u0 f13r6ee E XlIiTs t 0m 9o
d
ifStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*406499 70060 0 0 0x4000000 0 syz-executor.0
362185 42161 0 0 0x4000000 1 syz-executor.1
savectx() at savectx+0xb1
end of kernel
end trace frame: 0xd04be41c740, 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 0xfffffd806a88fe00+16 0x0!=0xd92d11fb23b77030
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0xd04be41c740, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800022fcbeb0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x33
r8 0xffffffff81ecd59f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x5fb3c7ecd0ab3c34
r12 0
r13 0
r14 0xffff800020ec7398
r15 0
rip 0xffffffff81cc53f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800022fcbe30
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=406499 stat=onproc
flags process=0 proc=4000000<THREAD>
pri=17, usrpri=74, nice=20
forw=0xffffffffffffffff, list=0xffff800020ec6c48,0xffffffff82678b88
process=0xffff800020e93b08 user=0xffff800022fc6000, vmspace=0xfffffd8064d91b90
estcpu=36, cpticks=1, pctcpu=0.0
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
70060 52854 53917 0 2 0 syz-executor.0
*70060 406499 53917 0 7 0x4000000 syz-executor.0
42161 385575 80070 0 2 0 syz-executor.1
42161 362185 80070 0 7 0x4000000 syz-executor.1
53917 367348 88230 0 3 0x82 nanosleep syz-executor.0
1719 123853 1 0 3 0x100083 ttyin getty
80070 507731 88230 0 3 0x82 nanosleep syz-executor.1
56900 205652 0 0 3 0x14200 acct acct
85145 469962 0 0 3 0x14200 bored sosplice
88230 465178 98798 0 3 0x82 thrsleep syz-fuzzer
88230 427710 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 66441 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 402969 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 413055 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 364477 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 375232 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 510306 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 484501 98798 0 3 0x4000082 thrsleep syz-fuzzer
88230 124679 98798 0 3 0x4000082 kqread syz-fuzzer
98798 279805 83360 0 3 0x10008a pause ksh
83360 87491 84400 0 3 0x92 select sshd
84400 73326 1 0 3 0x80 select sshd
51293 139693 54263 74 3 0x100092 bpf pflogd
54263 50955 1 0 3 0x80 netio pflogd
30696 230298 88552 73 3 0x100090 kqread syslogd
88552 63822 1 0 3 0x100082 netio syslogd
87543 159043 1 77 3 0x100090 poll dhclient
29159 152205 1 0 3 0x80 poll dhclient
37740 341548 0 0 3 0x14200 bored smr
49706 332355 0 0 2 0x14200 zerothread
64298 146063 0 0 3 0x14200 aiodoned aiodoned
47000 369773 0 0 3 0x14200 syncer update
98818 446287 0 0 3 0x14200 cleaner cleaner
23416 25865 0 0 3 0x14200 reaper reaper
28444 115852 0 0 3 0x14200 pgdaemon pagedaemon
63646 346766 0 0 3 0x14200 bored crynlk
7967 279408 0 0 3 0x14200 bored crypto
79275 366778 0 0 3 0x40014200 acpi0 acpi0
19032 93745 0 0 3 0x40014200 idle1
48400 512890 0 0 3 0x14200 bored softnet
29334 213683 0 0 3 0x14200 bored systqmp
1622 480205 0 0 3 0x14200 bored systq
16482 270956 0 0 3 0x40014200 bored softclock
38144 413798 0 0 3 0x40014200 idle0
1 243723 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_iopool_run+0x7d scsi_ioh_pending sys/scsi/scsi_base.c:405 [inline]
#3 scsi_iopool_run+0x7d sys/scsi/scsi_base.c:420
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 ufs_strategy+0x17c
#9 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#10 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#11 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:724
#12 ufs_direnter+0x8e3 sys/ufs/ufs/ufs_lookup.c:909
#13 ufs_mkdir+0x70b sys/ufs/ufs/ufs_vnops.c:1251
#14 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#15 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#16 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#16 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#17 Xsyscall+0x128
Process 70060 (syz-executor.0) thread 0xffff800020ec7398 (406499)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8263f188)
#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 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:724
#9 ufs_mkdir+0x6b7 sys/ufs/ufs/ufs_vnops.c:1248
#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 (0xfffffd80649f74d8)
#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+0x1cf sys/ufs/ffs/ffs_alloc.c:392
#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 (0xfffffd80649f7b38)
#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_iopool_run+0x7d scsi_ioh_pending sys/scsi/scsi_base.c:405 [inline]
#3 scsi_iopool_run+0x7d sys/scsi/scsi_base.c:420
#4 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#5 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#6 sdstrategy+0x187 sys/scsi/sd.c:585
#7 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#8 ufs_strategy+0x17c
#9 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#10 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#11 VOP_BWRITE+0x4a sys/kern/vfs_vops.c:724
#12 ufs_direnter+0x8e3 sys/ufs/ufs/ufs_lookup.c:909
#13 ufs_mkdir+0x70b sys/ufs/ufs/ufs_vnops.c:1251
#14 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#15 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#16 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#16 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#17 Xsyscall+0x128
Process 42161 (syz-executor.1) thread 0xffff800020ec6c48 (362185)
exclusive rwlock netlock r = 0 (0xffffffff8253a638)
#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 9573 6514K 6996K 78643K 12864 0
pcb 13 8K 8K 78643K 205 0
rtable 95 4K 4K 78643K 700 0
ifaddr 108 20K 20K 78643K 329 0
counters 43 33K 34K 78643K 115 0
ioctlops 0 0K 4K 78643K 1554 0
iov 0 0K 16K 78643K 213 0
mount 1 1K 1K 78643K 1 0
vnodes 1227 77K 78K 78643K 2037 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 17 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 1K 78643K 385 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 6 17K 25K 78643K 1303 0
sigio 0 0K 0K 78643K 12 0
proc 63 63K 95K 78643K 790 0
subproc 32 2K 2K 78643K 119 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 95 0
in_multi 119 5K 6K 78643K 264 0
ether_multi 1 0K 0K 78643K 32 0
mrt 0 0K 0K 78643K 4 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 73 334K 334K 78643K 73 0
exec 0 0K 1K 78643K 411 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 172 122K 122K 78643K 5629 0
UVM aobj 51 2K 3K 78643K 61 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 179 0
NDP 18 0K 1K 78643K 68 0
temp 156 3051K 3119K 78643K 44837 0
kqueue 3 4K 16K 78643K 52 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 20 0 14 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 107 0 105 1 0 1 1 0 8 0
rtentry 112 115 0 79 2 0 2 2 0 8 0
unpcb 120 805 0 794 1 0 1 1 0 8 0
syncache 264 24 0 24 9 9 0 1 0 8 0
tcpqe 32 175 0 175 4 4 0 1 0 8 0
tcpcb 544 438 0 434 1 0 1 1 0 8 0
inpcb 280 1300 0 1292 8 7 1 2 0 8 0
rttmr 72 2 0 2 2 2 0 1 0 8 0
nd6 48 24 0 17 1 0 1 1 0 8 0
pkpcb 40 12 0 12 4 4 0 1 0 8 0
swfcl 56 2 0 0 1 0 1 1 0 8 0
ppxss 1128 8 0 8 5 5 0 1 0 8 0
pffrag 232 15 0 15 5 4 1 1 0 482 1
pffrnode 88 15 0 15 5 4 1 1 0 8 1
pffrent 40 376 0 376 5 4 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 24 126 0 83 1 0 1 1 0 8 0
pfstkey 112 126 0 83 2 0 2 2 0 8 0
pfstate 328 126 0 83 5 0 5 5 0 8 1
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 256 517 0 331 15 3 12 14 0 8 0
art_table 32 518 0 331 2 0 2 2 0 8 0
art_node 16 114 0 85 1 0 1 1 0 8 0
sysvmsgpl 40 31 0 24 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 379 0 369 1 0 1 1 0 8 0
shmpl 112 59 0 12 2 0 2 2 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 3255 0 1848 89 0 89 89 0 8 0
ffsino 272 3255 0 1848 97 2 95 95 0 8 0
nchpl 144 5254 0 3670 60 0 60 60 0 8 0
uvmvnodes 72 3857 0 0 71 0 71 71 0 8 0
vnodes 208 3857 0 0 203 0 203 203 0 8 0
namei 1024 17514 0 17514 2 1 1 1 0 8 1
percpumem 16 68 0 36 1 0 1 1 0 8 0
vcpupl 1984 12 0 0 2 0 2 2 0 8 0
vmpool 560 15 0 3 1 0 1 1 0 8 0
scsiplug 64 2 0 2 1 1 0 1 0 8 0
scxspl 192 15742 0 15742 10 9 1 7 0 8 1
plimitpl 152 113 0 105 1 0 1 1 0 8 0
sigapl 424 1506 0 1472 5 1 4 5 0 8 0
futexpl 56 19161 0 19161 2 1 1 1 0 8 1
knotepl 112 176 0 157 1 0 1 1 0 8 0
kqueuepl 144 200 0 198 1 0 1 1 0 8 0
pipelkpl 48 261 0 251 1 0 1 1 0 8 0
pipepl 120 522 0 503 1 0 1 1 0 8 0
fdescpl 496 1489 0 1472 3 0 3 3 0 8 0
filepl 152 10365 0 10261 7 2 5 6 0 8 0
lockfpl 104 326 0 324 1 0 1 1 0 8 0
lockfspl 48 120 0 118 1 0 1 1 0 8 0
sessionpl 112 24 0 13 1 0 1 1 0 8 0
pgrppl 48 30 0 19 1 0 1 1 0 8 0
ucredpl 96 944 0 934 1 0 1 1 0 8 0
zombiepl 144 1472 0 1472 1 0 1 1 0 8 1
processpl 984 1506 0 1472 5 0 5 5 0 8 0
procpl 624 4541 0 4496 4 0 4 4 0 8 0
srpgc 64 2 0 2 1 1 0 1 0 8 0
sosppl 128 27 0 27 6 6 0 1 0 8 0
sockpl 400 2230 0 2209 14 11 3 6 0 8 0
mcl64k 65536 17 0 0 3 0 3 3 0 8 0
mcl16k 16384 5 0 0 1 0 1 1 0 8 0
mcl12k 12288 12 0 0 2 0 2 2 0 8 0
mcl9k 9216 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 17 0 0 3 0 3 3 0 8 0
mcl4k 4096 16 0 0 2 0 2 2 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 167 0 0 20 0 20 20 0 8 0
mtagpl 80 84 0 0 2 0 2 2 0 8 0
mbufpl 256 503 0 0 28 0 28 28 0 8 0
mbufpl: pool(0xffffffff8267b130:mbufpl): free list modified: page 0xfffffd807b479000; item ordinal 0; addr 0xfffffd807b479b00 (p 0xfffffd806df96000); offset 0x0=0x37d4cd9c45965f00
bufpl 280 6967 0 723 447 0 447 447 0 8 0
anonpl 16 156478 0 142179 102 37 65 76 0 124 0
amapchunkpl 152 9958 0 9822 33 27 6 20 0 158 0
amappl16 192 7840 0 7006 75 32 43 53 0 8 0
amappl15 184 117 0 113 1 0 1 1 0 8 0
amappl14 176 29 0 24 1 0 1 1 0 8 0
amappl13 168 321 0 320 1 0 1 1 0 8 0
amappl12 160 471 0 468 1 0 1 1 0 8 0
amappl11 152 374 0 357 1 0 1 1 0 8 0
amappl10 144 148 0 141 1 0 1 1 0 8 0
amappl9 136 446 0 443 1 0 1 1 0 8 0
amappl8 128 609 0 553 2 0 2 2 0 8 0
amappl7 120 262 0 248 1 0 1 1 0 8 0
amappl6 112 88 0 82 1 0 1 1 0 8 0
amappl5 104 1679 0 1660 1 0 1 1 0 8 0
amappl4 96 885 0 851 1 0 1 1 0 8 0
amappl3 88 140 0 134 1 0 1 1 0 8 0
amappl2 80 10793 0 10711 2 0 2 2 0 8 0
amappl1 72 43127 0 42661 23 13 10 18 0 8 0
amappl 80 4887 0 4836 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 60 0 10 1 0 1 1 0 8 0
uaddrrnd 24 1504 0 1475 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1504 0 1475 1 0 1 1 0 8 0
vmmpekpl 168 15612 0 15580 2 0 2 2 0 8 0
vmmpepl 168 192098 0 189906 195 78 117 123 0 357 18
vmsppl 368 1503 0 1475 3 0 3 3 0 8 0
pdppl 4096 3016 0 2962 7 0 7 7 0 8 0
pvpl 32 453785 0 436737 233 72 161 182 0 265 16
pmappl 232 1503 0 1475 3 1 2 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 297 0 20 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: 0xd04be41c740, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,66) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(66) at cnputc+0x4c sys/dev/cons.c:239
kputchar(66,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fcd5a) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcd5a) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8267b130,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd8068ff8d00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd8068ff8d00,0,fffffd806f6e2ea8,20,0,fffffd806f6e2e38) at ip_output+0xfd7 sys/netinet/ip_output.c:499
end trace frame: 0xffff800022fc4bc0, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639
comcnputc(800,66) at comcnputc+0x1c8 sys/dev/ic/com.c:1260
cnputc(66) at cnputc+0x4c sys/dev/cons.c:239
kputchar(66,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821fcd5a) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcd5a) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8267b130) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8267b130,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd8068ff8d00,32b4,5a0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
ip_fragment(fffffd8068ff8d00,ffff80000017b2a8,5b4) at ip_fragment+0x324
ip_output(fffffd8068ff8d00,0,fffffd806f6e2ea8,20,0,fffffd806f6e2e38) at ip_output+0xfd7 sys/netinet/ip_output.c:499
rip_output(fffffd8068ff8d00,fffffd807449b830,ffff800022fc4be8,ffff80002114a000) at rip_output+0x252 sys/netinet/raw_ip.c:289
rip_usrreq(fffffd807449b830,9,fffffd8068ff8d00,0,0,ffff800020ec6c48) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538
sosend(fffffd807449b830,0,ffff800022fc4d60,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020ec6c48,7,ffff800022fc4e40,0,ffff800022fc4f20) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020ec6c48,ffff800022fc4ed8,ffff800022fc4f20) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800022fc4fa0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800022fc4fa0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4de0489c9d0, count: -21
---
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Anton Lindqvist
May 19, 2020, 2:31:44 AM5/19/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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