This is a note to let you know that I've just added the patch titled
ASoC: SOF: debug: Fix a potential issue on string buffer termination
to the 5.4-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:
asoc-sof-debug-fix-a-potential-issue-on-string-buffe.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 46b205eb527e7c46784b569433050b55f11d241e
Author: Hui Wang <hui.wang@xxxxxxxxxxxxx>
Date: Mon Feb 8 18:38:57 2021 +0800
ASoC: SOF: debug: Fix a potential issue on string buffer termination
[ Upstream commit 9037c3bde65d339017ef41d81cb58069ffc321d4 ]
The function simple_write_to_buffer() doesn't add string termination
at the end of buf, we need to handle it on our own. This change refers
to the function tokenize_input() in debug.c and the function
sof_dfsentry_trace_filter_write() in trace.c.
Fixes: 091c12e1f50c ("ASoC: SOF: debug: add new debugfs entries for IPC flood test")
Reviewed-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx>
Signed-off-by: Hui Wang <hui.wang@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210208103857.75705-1-hui.wang@xxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c
index 5529e8eeca462..08726034ff090 100644
--- a/sound/soc/sof/debug.c
+++ b/sound/soc/sof/debug.c
@@ -135,7 +135,7 @@ static ssize_t sof_dfsentry_write(struct file *file, const char __user *buffer,
char *string;
int ret;
- string = kzalloc(count, GFP_KERNEL);
+ string = kzalloc(count+1, GFP_KERNEL);
if (!string)
return -ENOMEM;
