diff options
| author | Kay Sievers <kay@vrfy.org> | 2012-07-30 23:40:08 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 02:25:13 +0200 |
| commit | cdf53441368cc02ee4aa8a8343a5dc25132836f0 (patch) | |
| tree | 3867dc7e3a4477f7d2ed9ed5990b6d71f075c0d2 | |
| parent | drivers/misc/ti-st/st_core.c: missing NULL check (diff) | |
| download | linux-cdf53441368cc02ee4aa8a8343a5dc25132836f0.tar.xz linux-cdf53441368cc02ee4aa8a8343a5dc25132836f0.zip | |
kmsg: /dev/kmsg - properly return possible copy_from_user() failure
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>
| -rw-r--r-- | kernel/printk.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index 50c96b5651b6..852269adad25 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -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; } |