This is a note to let you know that I've just added the patch titled

RDS: Heap OOB write in rds_message_alloc_sgs()

to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: rds-heap-oob-write-in-rds_message_alloc_sgs.patch and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Sat Jan 13 15:16:15 CET 2018

From: Mohamed Ghannam simo.ghannam@gmail.com Date: Tue, 2 Jan 2018 19:44:34 +0000 Subject: RDS: Heap OOB write in rds_message_alloc_sgs()

From: Mohamed Ghannam simo.ghannam@gmail.com

[ Upstream commit c095508770aebf1b9218e77026e48345d719b17c ]

When args->nr_local is 0, nr_pages gets also 0 due some size calculation via rds_rm_size(), which is later used to allocate pages for DMA, this bug produces a heap Out-Of-Bound write access to a specific memory region.

Signed-off-by: Mohamed Ghannam simo.ghannam@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/rds/rdma.c | 3 +++ 1 file changed, 3 insertions(+)

--- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -516,6 +516,9 @@ int rds_rdma_extra_size(struct rds_rdma_

local_vec = (struct rds_iovec __user *)(unsigned long) args->local_vec_addr;

+ if (args->nr_local == 0) + return -EINVAL; + /* figure out the number of pages in the vector */ for (i = 0; i < args->nr_local; i++) { if (copy_from_user(&vec, &local_vec[i],

Patches currently in stable-queue which might be from simo.ghannam@gmail.com are

queue-3.18/rds-null-pointer-dereference-in-rds_atomic_free_op.patch queue-3.18/rds-heap-oob-write-in-rds_message_alloc_sgs.patch