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[TIPC]: Add argument validation for shutdown() 

This patch validates that the "how" argument to shutdown()
is SHUT_RDWR, since this is the only form that TIPC supports.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Allan Stephens 2008-03-06 15:05:38 -08:00 committed by David S. Miller
parent 8c8696553a
commit e247a8f5d0
1 changed files with 3 additions and 2 deletions
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5
net/tipc/socket.c
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@ -1419,7 +1419,7 @@ exit:
/** /**
* shutdown - shutdown socket connection * shutdown - shutdown socket connection
* @sock: socket structure * @sock: socket structure
* @how: direction to close (unused; always treated as read + write) * @how: direction to close (must be SHUT_RDWR)
* *
* Terminates connection (if necessary), then purges socket's receive queue. * Terminates connection (if necessary), then purges socket's receive queue.
* *
@ -1432,7 +1432,8 @@ static int shutdown(struct socket *sock, int how)
struct sk_buff *buf; struct sk_buff *buf;
int res; int res;
/* Could return -EINVAL for an invalid "how", but why bother? */ if (how != SHUT_RDWR)
return -EINVAL;
if (mutex_lock_interruptible(&tsock->lock)) if (mutex_lock_interruptible(&tsock->lock))
return -ERESTARTSYS; return -ERESTARTSYS;