From: Johannes Berg Date: Fri, 11 Oct 2013 12:47:05 +0000 (+0200) Subject: wireless: radiotap: fix parsing buffer overrun X-Git-Tag: v3.2.53~21 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d58900877a2845d03b40638fc3b4f2b2d0afe652;p=pandora-kernel.git wireless: radiotap: fix parsing buffer overrun commit f5563318ff1bde15b10e736e97ffce13be08bc1a upstream. When parsing an invalid radiotap header, the parser can overrun the buffer that is passed in because it doesn't correctly check 1) the minimum radiotap header size 2) the space for extended bitmaps The first issue doesn't affect any in-kernel user as they all check the minimum size before calling the radiotap function. The second issue could potentially affect the kernel if an skb is passed in that consists only of the radiotap header with a lot of extended bitmaps that extend past the SKB. In that case a read-only buffer overrun by at most 4 bytes is possible. Fix this by adding the appropriate checks to the parser. Reported-by: Evan Huus Signed-off-by: Johannes Berg Signed-off-by: Ben Hutchings --- Reading git-diff-tree failed