This is a note to let you know that I've just added the patch titled
RDMA/rtrs-clt: Check strnlen return len in sysfs mpath_policy_store()
to the 6.1-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:
rdma-rtrs-clt-check-strnlen-return-len-in-sysfs-mpat.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3262106f6eac96ec1d24539a554f0f562cc86a35
Author: Alexey Kodanev <aleksei.kodanev@xxxxxxxxxxx>
Date: Wed Feb 21 11:32:04 2024 +0000
RDMA/rtrs-clt: Check strnlen return len in sysfs mpath_policy_store()
[ Upstream commit 7a7b7f575a25aa68ee934ee8107294487efcb3fe ]
strnlen() may return 0 (e.g. for "\0\n" string), it's better to
check the result of strnlen() before using 'len - 1' expression
for the 'buf' array index.
Detected using the static analysis tool - Svace.
Fixes: dc3b66a0ce70 ("RDMA/rtrs-clt: Add a minimum latency multipath policy")
Signed-off-by: Alexey Kodanev <aleksei.kodanev@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240221113204.147478-1-aleksei.kodanev@xxxxxxxxxxx
Acked-by: Jack Wang <jinpu.wang@xxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c
index d3c436ead6946..4aa80c9388f05 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt-sysfs.c
@@ -133,7 +133,7 @@ static ssize_t mpath_policy_store(struct device *dev,
/* distinguish "mi" and "min-latency" with length */
len = strnlen(buf, NAME_MAX);
- if (buf[len - 1] == '\n')
+ if (len && buf[len - 1] == '\n')
len--;
if (!strncasecmp(buf, "round-robin", 11) ||
