This is a note to let you know that I've just added the patch titled
ASoC: stm: Prevent potential division by zero in stm32_sai_get_clk_div()
to the 5.15-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-stm-prevent-potential-division-by-zero-in-stm32.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5c92434682ed0abb67f42032d05f133e0cc523af
Author: Luo Yifan <luoyifan@xxxxxxxxxxxxxxxxxxxx>
Date: Thu Nov 7 09:59:36 2024 +0800
ASoC: stm: Prevent potential division by zero in stm32_sai_get_clk_div()
[ Upstream commit 23569c8b314925bdb70dd1a7b63cfe6100868315 ]
This patch checks if div is less than or equal to zero (div <= 0). If
div is zero or negative, the function returns -EINVAL, ensuring the
division operation is safe to perform.
Signed-off-by: Luo Yifan <luoyifan@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Olivier Moysan <olivier.moysan@xxxxxxxxxxx>
Link: https://patch.msgid.link/20241107015936.211902-1-luoyifan@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c
index aa9cdd93b5778..d71b4aecd269f 100644
--- a/sound/soc/stm/stm32_sai_sub.c
+++ b/sound/soc/stm/stm32_sai_sub.c
@@ -319,7 +319,7 @@ static int stm32_sai_get_clk_div(struct stm32_sai_sub_data *sai,
int div;
div = DIV_ROUND_CLOSEST(input_rate, output_rate);
- if (div > SAI_XCR1_MCKDIV_MAX(version)) {
+ if (div > SAI_XCR1_MCKDIV_MAX(version) || div <= 0) {
dev_err(&sai->pdev->dev, "Divider %d out of range\n", div);
return -EINVAL;
}
