5.4-stable review patch. If anyone has any objections, please let me know.
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From: Luo Yifan luoyifan@cmss.chinamobile.com
[ 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@cmss.chinamobile.com Reviewed-by: Olivier Moysan olivier.moysan@foss.st.com Link: https://patch.msgid.link/20241107015936.211902-1-luoyifan@cmss.chinamobile.c... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/stm/stm32_sai_sub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c index b7dc9d3192597..e8cd58c0838ee 100644 --- a/sound/soc/stm/stm32_sai_sub.c +++ b/sound/soc/stm/stm32_sai_sub.c @@ -318,7 +318,7 @@ 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; }