[PATCH] net: fix uninitialized variable issue

msg_iocb needs to be initialized on the recv/recvfrom path.
Otherwise afalg will wrongly interpret it as an async call.

Cc: stable@vger.kernel.org
Reported-by: Harald Freudenberger <redacted>
Signed-off-by: Tadeusz Struk <redacted>
---
 net/socket.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/socket.c b/net/socket.c
index dd2c247..80ca820 100644
--- a/net/socket.c
+++ b/net/socket.c

@@ -1702,6 +1702,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
 	msg.msg_name = addr ? (struct sockaddr *)&address : NULL;
 	/* We assume all kernel code knows the size of sockaddr_storage */
 	msg.msg_namelen = 0;
+	msg.msg_iocb = NULL;
 	if (sock->file->f_flags & O_NONBLOCK)
 		flags |= MSG_DONTWAIT;
 	err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags);

On Tue, 2015-12-15 at 10:46 -0800, Tadeusz Struk wrote:

Do not add "Cc: stable@vger.kernel.org" for networking patches, thanks 
( Documentation/networking/netdev-FAQ.txt )

Do you know when was this bug added ?

Please add the 

Fixes:  12-digit-sha1 ("patch title")

Thanks.

From: Tadeusz Struk <redacted>
Date: Tue, 15 Dec 2015 10:46:17 -0800

msg_iocb needs to be initialized on the recv/recvfrom path.
Otherwise afalg will wrongly interpret it as an async call.

Cc: stable@vger.kernel.org
Reported-by: Harald Freudenberger <redacted>
Signed-off-by: Tadeusz Struk <redacted>

Looks good, applied, thanks.

On 12/15/2015 11:02 AM, Eric Dumazet wrote:

On Tue, 2015-12-15 at 10:46 -0800, Tadeusz Struk wrote:

quoted

msg_iocb needs to be initialized on the recv/recvfrom path.
Otherwise afalg will wrongly interpret it as an async call.

Cc: stable@vger.kernel.org
Reported-by: Harald Freudenberger <redacted>
Signed-off-by: Tadeusz Struk <redacted>
---
 net/socket.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/socket.c b/net/socket.c
index dd2c247..80ca820 100644
--- a/net/socket.c
+++ b/net/socket.c

@@ -1702,6 +1702,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
 	msg.msg_name = addr ? (struct sockaddr *)&address : NULL;
 	/* We assume all kernel code knows the size of sockaddr_storage */
 	msg.msg_namelen = 0;
+	msg.msg_iocb = NULL;
 	if (sock->file->f_flags & O_NONBLOCK)
 		flags |= MSG_DONTWAIT;
 	err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags);

Do not add "Cc: stable@vger.kernel.org" for networking patches, thanks 
( Documentation/networking/netdev-FAQ.txt )

Do you know when was this bug added ?

Please add the 

Fixes:  12-digit-sha1 ("patch title")

It was added in this commit: 0345f93138b2 ("net: socket: add support for async operations")

Thanks
-- 
TS

On Tue, 2015-12-15 at 14:42 -0800, Tadeusz Struk wrote:

It was added in this commit: 0345f93138b2 ("net: socket: add support for async operations")

Thanks !