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authorHerbert Xu <herbert@gondor.apana.org.au>2010-11-30 08:49:02 (GMT)
committerHerbert Xu <herbert@gondor.apana.org.au>2010-11-30 08:49:02 (GMT)
commit0f6bb83cb12e4617e696ffa566f3fc6c092686e2 (patch)
treec871ab8acedb25ba19de73be427620af8475236d /include/sound/cs46xx.h
parent7451708f39db19a8303bb7fb95f00aca9f673cb5 (diff)
downloadlinux-fsl-qoriq-0f6bb83cb12e4617e696ffa566f3fc6c092686e2.tar.xz
crypto: algif_skcipher - Fixed overflow when sndbuf is page aligned
When sk_sndbuf is not a multiple of PAGE_SIZE, the limit tests in sendmsg fail as the limit variable becomes negative and we're using an unsigned comparison. The same thing can happen if sk_sndbuf is lowered after a sendmsg call. This patch fixes this by always taking the signed maximum of limit and 0 before we perform the comparison. It also rounds the value of sk_sndbuf down to a multiple of PAGE_SIZE so that we don't end up allocating a page only to use a small number of bytes in it because we're bound by sk_sndbuf. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/sound/cs46xx.h')
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