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Message-Id: <1592362839-4050-1-git-send-email-jrdr.linux@gmail.com>
Date: Wed, 17 Jun 2020 08:30:39 +0530
From: Souptick Joarder <jrdr.linux@...il.com>
To: jgg@...pe.ca, dan.j.williams@...el.com, gregkh@...uxfoundation.org,
arnd@...db.de, mchehab+samsung@...nel.org,
akpm@...ux-foundation.org
Cc: dan.carpenter@...cle.com, linux-kernel@...r.kernel.org,
Souptick Joarder <jrdr.linux@...il.com>,
John Hubbard <jhubbard@...dia.com>
Subject: [PATCH v2] drivers/virt/fsl_hypervisor: Correcting error handling path
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@...il.com>
Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
Cc: John Hubbard <jhubbard@...dia.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
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