From: Dan Carpenter <dan.carpenter@oracle.com>
To: Namjae Jeon <linkinjeon@kernel.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>,
Steve French <sfrench@samba.org>,
Hyunchul Lee <hyc.lee@gmail.com>,
linux-cifs@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] ksmbd: fix error code in ndr_read_int32()
Date: Tue, 30 Nov 2021 15:50:47 +0300 [thread overview]
Message-ID: <20211130125047.GA24578@kili> (raw)
This is a failure path and it should return -EINVAL instead of success.
Otherwise it could result in the caller using uninitialized memory.
Fixes: 303fff2b8c77 ("ksmbd: add validation for ndr read/write functions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
fs/ksmbd/ndr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ksmbd/ndr.c b/fs/ksmbd/ndr.c
index 8317f7ca402b..5052be9261d9 100644
--- a/fs/ksmbd/ndr.c
+++ b/fs/ksmbd/ndr.c
@@ -148,7 +148,7 @@ static int ndr_read_int16(struct ndr *n, __u16 *value)
static int ndr_read_int32(struct ndr *n, __u32 *value)
{
if (n->offset + sizeof(__u32) > n->length)
- return 0;
+ return -EINVAL;
if (value)
*value = le32_to_cpu(*(__le32 *)ndr_get_field(n));
--
2.20.1
next reply other threads:[~2021-11-30 12:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-30 12:50 Dan Carpenter [this message]
2021-12-01 0:32 ` [PATCH] ksmbd: fix error code in ndr_read_int32() Namjae Jeon
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