diff options
| author | Xi Wang <xi.wang@gmail.com> | 2013-02-27 17:05:21 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-04 06:03:36 +0800 |
| commit | 603e070fed3c15250c98b5de8af1db0f0647ff3c (patch) | |
| tree | 08d3489213e4fb3eb726f2e508427172bb7dbfa7 | |
| parent | fd9471ef7e6ee38a7f29f5556928ddf4824f8bdd (diff) | |
sysctl: fix null checking in bin_dn_node_address()
commit df1778be1a33edffa51d094eeda87c858ded6560 upstream.
The null check of `strchr() + 1' is broken, which is always non-null,
leading to OOB read. Instead, check the result of strchr().
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/sysctl_binary.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c index 5a638445050..0ddf3a06942 100644 --- a/kernel/sysctl_binary.c +++ b/kernel/sysctl_binary.c @@ -1194,9 +1194,10 @@ static ssize_t bin_dn_node_address(struct file *file, /* Convert the decnet address to binary */ result = -EIO; - nodep = strchr(buf, '.') + 1; + nodep = strchr(buf, '.'); if (!nodep) goto out; + ++nodep; area = simple_strtoul(buf, NULL, 10); node = simple_strtoul(nodep, NULL, 10); |