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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: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Acked-by: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Link: https://lore.kernel.org/r/20201110144614.43194-1-wanghai38@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wang Hai 2020-11-10 22:46:14 +08:00 committed by Greg Kroah-Hartman
parent c0a6cc9e11
commit 2ab9c76986
1 changed files with 1 additions and 0 deletions
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drivers/net/wan/cosa.c
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@ -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;
}
}