This is a note to let you know that I've just added the patch titled
ASoC: SOF: ipc3: Check for upper size limit for the received message
to the 6.2-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:
asoc-sof-ipc3-check-for-upper-size-limit-for-the-rec.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 606a7a34d4279e7fa657e52671b69c00b590e6ab
Author: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Date: Tue Mar 7 13:49:17 2023 +0200
ASoC: SOF: ipc3: Check for upper size limit for the received message
[ Upstream commit 989a3e4479177d0f4afab8be1960731bc0ffbbd0 ]
The sof_ipc3_rx_msg() checks for minimum size of a new rx message but it is
missing the check for upper limit.
Corrupted or compromised firmware might be able to take advantage of this
to cause out of bounds reads outside of the message area.
Reported-by: Curtis Malainey <cujomalainey@xxxxxxxxxxxx>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Curtis Malainey <curtis@xxxxxxxxxxxx>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230307114917.5124-1-peter.ujfalusi@xxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/sof/ipc3.c b/sound/soc/sof/ipc3.c
index 1fef4dcc09368..fde8af5a1f485 100644
--- a/sound/soc/sof/ipc3.c
+++ b/sound/soc/sof/ipc3.c
@@ -970,8 +970,9 @@ static void sof_ipc3_rx_msg(struct snd_sof_dev *sdev)
return;
}
- if (hdr.size < sizeof(hdr)) {
- dev_err(sdev->dev, "The received message size is invalid\n");
+ if (hdr.size < sizeof(hdr) || hdr.size > SOF_IPC_MSG_MAX_SIZE) {
+ dev_err(sdev->dev, "The received message size is invalid: %u\n",
+ hdr.size);
return;
}
