[PATCH 4.9 32/75] RDS: Check cmsg_len before dereferencing CMSG_DATA

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Avinash Repaka [ Upstream commit 14e138a86f6347c6199f610576d2e11c03bec5f0 ] RDS currently doesn't check if the length of the control message is large enough to hold

[PATCH 4.9 32/75] RDS: Check cmsg_len before dereferencing CMSG_DATA

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Avinash Repaka [ Upstream commit 14e138a86f6347c6199f610576d2e11c03bec5f0 ] RDS currently doesn't check if the length of the control message is large enough to hold the required data, before