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authorNicolas Dichtel <nicolas.dichtel@6wind.com>2011-01-11 11:04:12 +0300
committerDavid S. Miller <davem@davemloft.net>2011-01-12 01:03:09 +0300
commitfa6dd8a2c89861d05621ce7e2880e485bec22fba (patch)
tree8636aee24a084dc6b530cc8c0e06c283429d037e /net
parentf76957fc8fc4fa9735f01e59653b2792b077de06 (diff)
downloadlinux-fa6dd8a2c89861d05621ce7e2880e485bec22fba.tar.xz
xfrm: check trunc_len in XFRMA_ALG_AUTH_TRUNC
Maximum trunc length is defined by MAX_AH_AUTH_LEN (in bytes) and need to be checked when this value is set (in bits) by the user. In ah4.c and ah6.c a BUG_ON() checks this condiftion. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/xfrm/xfrm_user.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 6a8da81ff66f..d5e1e0b08890 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -26,6 +26,7 @@
#include <net/sock.h>
#include <net/xfrm.h>
#include <net/netlink.h>
+#include <net/ah.h>
#include <asm/uaccess.h>
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
#include <linux/in6.h>
@@ -302,7 +303,8 @@ static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
if (!algo)
return -ENOSYS;
- if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
+ if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
+ ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
return -EINVAL;
*props = algo->desc.sadb_alg_id;