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| author | Donald Sharp <sharpd@cumulusnetworks.com> | 2016-03-11 16:28:34 -0500 |
|---|---|---|
| committer | Donald Sharp <sharpd@cumulusnetworks.com> | 2016-03-11 18:29:14 -0500 |
| commit | 5e57b5fc621300427d3818f0723b8cd8d5e5ca6a (patch) | |
| tree | 738345e0c3121f329266e8b8faaa88661e7cdb2e /ospfd/ospf_zebra.c | |
| parent | e3f623be8b6556db9d70c2fc5d3c2b152f36dc1d (diff) | |
| download | quagga-5e57b5fc621300427d3818f0723b8cd8d5e5ca6a.tar.bz2 quagga-5e57b5fc621300427d3818f0723b8cd8d5e5ca6a.tar.xz | |
quagga: Remove double read of stream
The addition of a MIN(X,Y) with a stream_getc in the Y
causes a double read of the stream due to the way that
MIN is defined.
This fix removes a crash in all protocols.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Diffstat (limited to 'ospfd/ospf_zebra.c')
| -rw-r--r-- | ospfd/ospf_zebra.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/ospfd/ospf_zebra.c b/ospfd/ospf_zebra.c index 4531f13d..89404552 100644 --- a/ospfd/ospf_zebra.c +++ b/ospfd/ospf_zebra.c @@ -832,6 +832,7 @@ ospf_zebra_read_ipv4 (int command, struct zclient *zclient, struct prefix_ipv4 p; struct external_info *ei; struct ospf *ospf; + unsigned char plength = 0; s = zclient->ibuf; ifindex = 0; @@ -845,7 +846,8 @@ ospf_zebra_read_ipv4 (int command, struct zclient *zclient, /* IPv4 prefix. */ memset (&p, 0, sizeof (struct prefix_ipv4)); p.family = AF_INET; - p.prefixlen = MIN(IPV4_MAX_PREFIXLEN, stream_getc (s)); + plength = stream_getc (s); + p.prefixlen = MIN(IPV4_MAX_PREFIXLEN, plength); stream_get (&p.prefix, s, PSIZE (p.prefixlen)); if (IPV4_NET127(ntohl(p.prefix.s_addr))) |