CVE-2005-4886

First published: Sun Apr 24 2005(Updated: )

Escalated to Bugzilla from IssueTracker [SELINUX]: Fix ipv6_skip_exthdr() invocation causing OOPS. author Herbert Xu <herbert.org.au> Mon, 25 Apr 2005 03:16:19 +0000 (20:16 -0700) committer David S. Miller <davem> Mon, 25 Apr 2005 03:16:19 +0000 (20:16 -0700) The SELinux hooks invoke ipv6_skip_exthdr() with an incorrect length final argument. However, the length argument turns out to be superfluous. I was just reading ipv6_skip_exthdr and it occured to me that we can get rid of len altogether. The only place where len is used is to check whether the skb has two bytes for ipv6_opt_hdr. This check is done by skb_header_pointer/skb_copy_bits anyway. Now it might appear that we've made the code slower by deferring the check to skb_copy_bits. However, this check should not trigger in the common case so this is OK.

Credit: secalert@redhat.com

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