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| author | Xi Wang <xi.wang@gmail.com> | 2013-02-27 17:05:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-27 19:10:21 -0800 |
| commit | df1778be1a33edffa51d094eeda87c858ded6560 (patch) | |
| tree | b293cff5791db36641d4c3e802d0c16c77bfe362 | |
| parent | ac2e5327a5e4f6477afc6a3b3b0dc6e0476d71d4 (diff) | |
| download | linux-df1778be1a33edffa51d094eeda87c858ded6560.tar.gz linux-df1778be1a33edffa51d094eeda87c858ded6560.tar.bz2 linux-df1778be1a33edffa51d094eeda87c858ded6560.zip | |
sysctl: fix null checking in bin_dn_node_address()
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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.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 b25115e8c7f3..ebf72358e86a 100644 --- a/kernel/sysctl_binary.c +++ b/kernel/sysctl_binary.c @@ -1171,9 +1171,10 @@ 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); |