This is a note to let you know that I've just added the patch titled cosa: Add missing kfree in error path of cosa_write to the 5.9-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: cosa-add-missing-kfree-in-error-path-of-cosa_write.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f3f08c5fe957ce3c92b1a207487b942ff64ee46e Author: Wang Hai <wanghai38@xxxxxxxxxx> Date: Tue Nov 10 22:46:14 2020 +0800 cosa: Add missing kfree in error path of cosa_write [ Upstream commit 52755b66ddcef2e897778fac5656df18817b59ab ] If memory allocation for 'kbuf' succeed, cosa_write() doesn't have a corresponding kfree() in exception handling. Thus add kfree() for this function implementation. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Signed-off-by: Wang Hai <wanghai38@xxxxxxxxxx> Acked-by: Jan "Yenya" Kasprzak <kas@xxxxxxxxxx> Link: https://lore.kernel.org/r/20201110144614.43194-1-wanghai38@xxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c index f8aed0696d775..2369ca250cd65 100644 --- a/drivers/net/wan/cosa.c +++ b/drivers/net/wan/cosa.c @@ -889,6 +889,7 @@ static ssize_t cosa_write(struct file *file, chan->tx_status = 1; spin_unlock_irqrestore(&cosa->lock, flags); up(&chan->wsem); + kfree(kbuf); return -ERESTARTSYS; } }