Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Souptick Joarder <jrdr.linux@gmail.com>
To:     akpm@linux-foundation.org
Cc:     jgg@ziepe.ca, dan.j.williams@intel.com, gregkh@linuxfoundation.org,
        mchehab+samsung@kernel.org, linux-kernel@vger.kernel.org,
        dan.carpenter@oracle.com, Souptick Joarder <jrdr.linux@gmail.com>,
        John Hubbard <jhubbard@nvidia.com>
Subject: [PATCH v2] drivers/virt/fsl_hypervisor: Correcting error handling path
Date:   Thu, 30 Jul 2020 00:31:09 +0530
Message-Id: <1596049269-14950-1-git-send-email-jrdr.linux@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

First, when memory allocation for sg_list_unaligned failed, there
is no point of calling put_pages() as we haven't pinned any pages.

Second, if get_user_pages_fast() failed we should unpinned num_pinned
pages, no point of checking till num_pages.

This will address both.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: John Hubbard <jhubbard@nvidia.com>
---
v2:
	Added review tag.

 drivers/virt/fsl_hypervisor.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c
index 1b0b11b..ea344d7 100644
--- a/drivers/virt/fsl_hypervisor.c
+++ b/drivers/virt/fsl_hypervisor.c
@@ -157,7 +157,7 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p)
 
 	unsigned int i;
 	long ret = 0;
-	int num_pinned; /* return value from get_user_pages() */
+	int num_pinned = 0; /* return value from get_user_pages() */
 	phys_addr_t remote_paddr; /* The next address in the remote buffer */
 	uint32_t count; /* The number of bytes left to copy */
 
@@ -293,7 +293,7 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p)
 
 exit:
 	if (pages) {
-		for (i = 0; i < num_pages; i++)
+		for (i = 0; i < num_pinned; i++)
 			if (pages[i])
 				put_page(pages[i]);
 	}
-- 
1.9.1