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

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Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Kay Sievers <kay@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kay Sievers
2012-07-30 14:40:08 -07:00
committed by Linus Torvalds
parent 5353cf089b
commit cdf5344136
1 changed files with 3 additions and 1 deletions
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4
kernel/printk.c
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@@ -389,8 +389,10 @@ static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
line = buf; line = buf;
for (i = 0; i < count; i++) { 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; goto out;
}
line += iv[i].iov_len; line += iv[i].iov_len;
} }