Commit cdf53441 authored by Kay Sievers's avatar Kay Sievers Committed by Linus Torvalds
Browse files

kmsg: /dev/kmsg - properly return possible copy_from_user() failure 



Reported-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarKay Sievers <kay@vrfy.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5353cf08

kernel/printk.c

+3 −1
Original line number Diff line number Diff line
@@ -389,8 +389,10 @@ static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv, 


	line = buf;

	for (i = 0; i < count; i++) {

		if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len))

		if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len)) {

			ret = -EFAULT;

			goto out;

		}

		line += iv[i].iov_len;

	}