devlink: validate length of region addr/len

[ Upstream commit ff3b63b8c299b73ac599b120653b47e275407656 ]

DEVLINK_ATTR_REGION_CHUNK_ADDR and DEVLINK_ATTR_REGION_CHUNK_LEN
lack entries in the netlink policy. Corresponding nla_get_u64()s
may read beyond the end of the message.

Fixes: 4e54795a27f5 ("devlink: Add support for region snapshot read command")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 3095b5b..a77e377 100644 (file)
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -3607,6 +3607,8 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
        [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
        [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
        [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
+       [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
+       [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
 };
 
 static const struct genl_ops devlink_nl_ops[] = {