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Fix an integer overflow in computing the size of a temporary buffer

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can result in a buffer which is too small for the requested
operation.

Security:	CVE-2013-3077
Security:	FreeBSD-SA-13:09.ip_multicast
This commit is contained in:
Xin LI 2013-08-22 00:51:37 +00:00
parent 7da1a731c6
commit acde2476c4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=254629
2 changed files with 4 additions and 0 deletions
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2
sys/netinet/in_mcast.c
View File

@ -1648,6 +1648,8 @@ inp_get_source_filters(struct inpcb *inp, struct sockopt *sopt)
* has asked for, but we always tell userland how big the
* buffer really needs to be.
*/
if (msfr.msfr_nsrcs > in_mcast_maxsocksrc)
msfr.msfr_nsrcs = in_mcast_maxsocksrc;
tss = NULL;
if (msfr.msfr_srcs != NULL && msfr.msfr_nsrcs > 0) {
tss = malloc(sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs,

2
sys/netinet6/in6_mcast.c
View File

@ -1625,6 +1625,8 @@ in6p_get_source_filters(struct inpcb *inp, struct sockopt *sopt)
* has asked for, but we always tell userland how big the
* buffer really needs to be.
*/
if (msfr.msfr_nsrcs > in6_mcast_maxsocksrc)
msfr.msfr_nsrcs = in6_mcast_maxsocksrc;
tss = NULL;
if (msfr.msfr_srcs != NULL && msfr.msfr_nsrcs > 0) {
tss = malloc(sizeof(struct sockaddr_storage) * msfr.msfr_nsrcs,