From: Mark Salyzyn <salyzyn@xxxxxxxxxxx>
commit 37bd22420f856fcd976989f1d4f1f7ad28e1fcac upstream.
In pfkey_dump() dplen and splen can both be specified to access the
xfrm_address_t structure out of bounds in__xfrm_state_filter_match()
when it calls addr_match() with the indexes. Return EINVAL if either
are out of range.
Signed-off-by: Mark Salyzyn <salyzyn@xxxxxxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: kernel-team@xxxxxxxxxxx
Cc: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/key/af_key.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1873,6 +1873,13 @@ static int pfkey_dump(struct sock *sk, s
if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
+ if ((xfilter->sadb_x_filter_splen >=
+ (sizeof(xfrm_address_t) << 3)) ||
+ (xfilter->sadb_x_filter_dplen >=
+ (sizeof(xfrm_address_t) << 3))) {
+ mutex_unlock(&pfk->dump_lock);
+ return -EINVAL;
+ }
filter = kmalloc(sizeof(*filter), GFP_KERNEL);
if (filter == NULL) {
mutex_unlock(&pfk->dump_lock);
