This is a note to let you know that I've just added the patch titled
net: ieee802154: adf7242: Fix some potential buffer overflow in adf7242_stats_show()
to the 6.5-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:
net-ieee802154-adf7242-fix-some-potential-buffer-ove.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 84dbcbccb3f51734794f4a4eb1c83c825ec23da3
Author: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Date: Sat Oct 21 20:03:53 2023 +0200
net: ieee802154: adf7242: Fix some potential buffer overflow in adf7242_stats_show()
[ Upstream commit ca082f019d8fbb983f03080487946da714154bae ]
strncat() usage in adf7242_debugfs_init() is wrong.
The size given to strncat() is the maximum number of bytes that can be
written, excluding the trailing NULL.
Here, the size that is passed, DNAME_INLINE_LEN, does not take into account
the size of "adf7242-" that is already in the array.
In order to fix it, use snprintf() instead.
Fixes: 7302b9d90117 ("ieee802154/adf7242: Driver for ADF7242 MAC IEEE802154")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ieee802154/adf7242.c b/drivers/net/ieee802154/adf7242.c
index a03490ba2e5b3..cc7ddc40020fd 100644
--- a/drivers/net/ieee802154/adf7242.c
+++ b/drivers/net/ieee802154/adf7242.c
@@ -1162,9 +1162,10 @@ static int adf7242_stats_show(struct seq_file *file, void *offset)
static void adf7242_debugfs_init(struct adf7242_local *lp)
{
- char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "adf7242-";
+ char debugfs_dir_name[DNAME_INLINE_LEN + 1];
- strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN);
+ snprintf(debugfs_dir_name, sizeof(debugfs_dir_name),
+ "adf7242-%s", dev_name(&lp->spi->dev));
lp->debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
