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ASoC: SOF: debug: Fix a potential issue on string buffer termination

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[ Upstream commit 9037c3bde6 ]

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: 091c12e1f5 ("ASoC: SOF: debug: add new debugfs entries for IPC flood test")
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20210208103857.75705-1-hui.wang@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hui Wang 2021-02-08 18:38:57 +08:00 committed by Greg Kroah-Hartman
parent 47d3596488
commit 79717a3381
1 changed files with 1 additions and 1 deletions
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2
sound/soc/sof/debug.c
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@ -350,7 +350,7 @@ 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;