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.w...@gmail.com>
Cc: sta...@vger.kernel.org
---
kernel/sysctl_binary.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
index 5a63844..0ddf3a0 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);
--
1.7.10.4
--
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