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author | Linhaifeng <haifeng.lin@huawei.com> | 2019-11-29 06:13:35 +0000 |
---|---|---|
committer | Ben Pfaff <blp@ovn.org> | 2019-12-02 11:25:09 -0800 |
commit | 6980f2bc4d966b82dd9785f67791858695d6530b (patch) | |
tree | 7e27b024ba1d03bf01bf915207d143f41c1ff7d1 | |
parent | 33824049b10863191a30a2c51efdb5ef6c0ca4fa (diff) | |
download | openvswitch-6980f2bc4d966b82dd9785f67791858695d6530b.tar.gz |
ofproto: fix stack-buffer-overflow
Should use flow->actions not &flow->actions.
here is ASAN report:
=================================================================
==57189==ERROR: AddressSanitizer: stack-buffer-overflow on address 0xffff428fa0e8 at pc 0xffff7f61a520 bp 0xffff428f9420 sp 0xffff428f9498 READ of size 196 at 0xffff428fa0e8 thread T150 (revalidator22)
#0 0xffff7f61a51f in __interceptor_memcpy (/lib64/libasan.so.4+0xa251f)
#1 0xaaaad26a3b2b in ofpbuf_put lib/ofpbuf.c:426
#2 0xaaaad26a30cb in ofpbuf_clone_data_with_headroom lib/ofpbuf.c:248
#3 0xaaaad26a2e77 in ofpbuf_clone_with_headroom lib/ofpbuf.c:218
#4 0xaaaad26a2dc3 in ofpbuf_clone lib/ofpbuf.c:208
#5 0xaaaad23e3993 in ukey_set_actions ofproto/ofproto-dpif-upcall.c:1640
#6 0xaaaad23e3f03 in ukey_create__ ofproto/ofproto-dpif-upcall.c:1696
#7 0xaaaad23e553f in ukey_create_from_dpif_flow ofproto/ofproto-dpif-upcall.c:1806
#8 0xaaaad23e65fb in ukey_acquire ofproto/ofproto-dpif-upcall.c:1984
#9 0xaaaad23eb583 in revalidate ofproto/ofproto-dpif-upcall.c:2625
#10 0xaaaad23dee5f in udpif_revalidator ofproto/ofproto-dpif-upcall.c:1076
#11 0xaaaad26b84ef in ovsthread_wrapper lib/ovs-thread.c:708
#12 0xffff7e74a8bb in start_thread (/lib64/libpthread.so.0+0x78bb)
#13 0xffff7e0665cb in thread_start (/lib64/libc.so.6+0xd55cb)
Address 0xffff428fa0e8 is located in stack of thread T150 (revalidator22) at offset 328 in frame
#0 0xaaaad23e4cab in ukey_create_from_dpif_flow ofproto/ofproto-dpif-upcall.c:1762
This frame has 4 object(s):
[32, 96) 'actions'
[128, 192) 'buf'
[224, 328) 'full_flow'
[384, 2432) 'stub' <== Memory access at offset 328 partially underflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported) Thread T150 (revalidator22) created by T0 here:
#0 0xffff7f5b0f7f in __interceptor_pthread_create (/lib64/libasan.so.4+0x38f7f)
#1 0xaaaad26b891f in ovs_thread_create lib/ovs-thread.c:792
#2 0xaaaad23dc62f in udpif_start_threads ofproto/ofproto-dpif-upcall.c:639
#3 0xaaaad23daf87 in ofproto_set_flow_table ofproto/ofproto-dpif-upcall.c:446
#4 0xaaaad230ff7f in dpdk_evs_cfg_set vswitchd/bridge.c:1134
#5 0xaaaad2310097 in bridge_reconfigure vswitchd/bridge.c:1148
#6 0xaaaad23279d7 in bridge_run vswitchd/bridge.c:3944
#7 0xaaaad23365a3 in main vswitchd/ovs-vswitchd.c:240
#8 0xffff7dfb1adf in __libc_start_main (/lib64/libc.so.6+0x20adf)
#9 0xaaaad230a3d3 (/usr/sbin/ovs-vswitchd-2.7.0-1.1.RC5.001.asan+0x26f3d3)
SUMMARY: AddressSanitizer: stack-buffer-overflow (/lib64/libasan.so.4+0xa251f) in __interceptor_memcpy Shadow bytes around the buggy address:
0x200fe851f3c0: 00 00 00 00 f1 f1 f1 f1 f8 f2 f2 f2 00 00 00 00
0x200fe851f3d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x200fe851f3e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x200fe851f3f0: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00
0x200fe851f400: f2 f2 f2 f2 f8 f8 f8 f8 f8 f8 f8 f8 f2 f2 f2 f2
=>0x200fe851f410: 00 00 00 00 00 00 00 00 00 00 00 00 00[f2]f2 f2
0x200fe851f420: f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00
0x200fe851f430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x200fe851f440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x200fe851f450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x200fe851f460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==57189==ABORTING
Acked-by: Numan Siddique <numans@ovn.org>
Signed-off-by: Linhaifeng <haifeng.lin@huawei.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
-rw-r--r-- | ofproto/ofproto-dpif-upcall.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ofproto/ofproto-dpif-upcall.c b/ofproto/ofproto-dpif-upcall.c index d242397ab..de3bbf3d1 100644 --- a/ofproto/ofproto-dpif-upcall.c +++ b/ofproto/ofproto-dpif-upcall.c @@ -1588,7 +1588,7 @@ ukey_create_from_dpif_flow(const struct udpif *udpif, dump_seq = seq_read(udpif->dump_seq); reval_seq = seq_read(udpif->reval_seq) - 1; /* Ensure revalidation. */ - ofpbuf_use_const(&actions, &flow->actions, flow->actions_len); + ofpbuf_use_const(&actions, flow->actions, flow->actions_len); *ukey = ukey_create__(flow->key, flow->key_len, flow->mask, flow->mask_len, flow->ufid_present, &flow->ufid, flow->pmd_id, &actions, dump_seq, |