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 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rds-heap-oob-write-in-rds_message_alloc_sgs.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sat Jan 13 14:28:20 CET 2018
From: Mohamed Ghannam <simo.ghannam@xxxxxxxxx>
Date: Tue, 2 Jan 2018 19:44:34 +0000
Subject: RDS: Heap OOB write in rds_message_alloc_sgs()
From: Mohamed Ghannam <simo.ghannam@xxxxxxxxx>
[ 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@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/rds/rdma.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -517,6 +517,9 @@ 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@xxxxxxxxx are
queue-4.4/rds-null-pointer-dereference-in-rds_atomic_free_op.patch
queue-4.4/rds-heap-oob-write-in-rds_message_alloc_sgs.patch