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| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2010-11-30 16:49:02 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2010-11-30 16:49:02 +0800 |
| commit | 0f6bb83cb12e4617e696ffa566f3fc6c092686e2 (patch) | |
| tree | c871ab8acedb25ba19de73be427620af8475236d /crypto/authenc.c | |
| parent | crypto: af_alg - Add dependency on NET (diff) | |
| download | wireguard-linux-0f6bb83cb12e4617e696ffa566f3fc6c092686e2.tar.xz wireguard-linux-0f6bb83cb12e4617e696ffa566f3fc6c092686e2.zip | |
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 'crypto/authenc.c')
0 files changed, 0 insertions, 0 deletions