[PATCH 3.18 72/92] ipv6: avoid overflow of offset in ip6_find_1stfragopt

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Sabrina Dubroca [ Upstream commit 6399f1fae4ec29fab5ec7607043e256ca3a6 ] In some cases, offset can overflow and can cause an infinite loop in ip6_find_1stfragopt().

[PATCH 3.18 72/92] ipv6: avoid overflow of offset in ip6_find_1stfragopt

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Sabrina Dubroca [ Upstream commit 6399f1fae4ec29fab5ec7607043e256ca3a6 ] In some cases, offset can overflow and can cause an infinite loop in ip6_find_1stfragopt(). Make it unsigned int