diff options
| author | Mark Salyzyn <salyzyn@android.com> | 2020-07-22 14:00:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-26 19:01:28 +0300 |
| commit | b59a23d596807a5aa88d8dd5655a66c6843729b3 (patch) | |
| tree | c46c99d94aa81c82b95b6561fe7fbe8eea396377 | |
| parent | d09b80172c22df7a5e2ec58aa1a0fbe8914752e7 (diff) | |
| download | linux-b59a23d596807a5aa88d8dd5655a66c6843729b3.tar.xz | |
af_key: pfkey_dump needs parameter validation
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@android.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: kernel-team@android.com
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/key/af_key.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c index 1982f9f31deb..e340e97224c3 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1855,6 +1855,13 @@ static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_ms 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); |