[PATCH] s390: fix memory leak in vmcp

If vmcp is interrupted by a signal the vmcp command buffer is not freed.
Found by Pete Zaitcev.

Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 8990d8076e7d..19762f3476aa 100644
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -103,8 +103,10 @@ vmcp_write(struct file *file, const char __user * buff, size_t count,
         }
         cmd[count] = '\0';
         session = (struct vmcp_session *)file->private_data;
-        if (down_interruptible(&session->mutex))
+        if (down_interruptible(&session->mutex)) {
+                kfree(cmd);
                 return -ERESTARTSYS;
+        }
         if (!session->response)
                 session->response = (char *)__get_free_pages(GFP_KERNEL
                                                 | __GFP_REPEAT  | GFP_DMA,