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| author | Mark Salyzyn <salyzyn@android.com> | 2020-07-22 14:00:53 +0300 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2020-07-22 14:33:22 +0300 |
| commit | 37bd22420f856fcd976989f1d4f1f7ad28e1fcac (patch) | |
| tree | 02c77754ef032f73755b316c72013c5075fb6c64 /net/key | |
| parent | 101dde4207f1daa1fda57d714814a03835dccc3f (diff) | |
| download | linux-37bd22420f856fcd976989f1d4f1f7ad28e1fcac.tar.xz | |
af_key: pfkey_dump needs parameter validation
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>
Diffstat (limited to 'net/key')
| -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 979c579afc63..a915bc86620a 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1849,6 +1849,13 @@ 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); |