From: Denis Kirjanov <kda@linux-powerpc.org>
To: benh@kernel.crashing.org, mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org, Denis Kirjanov <kda@linux-powerpc.org>
Subject: [PATCH] agp/uninorth: fix a memleak in create_gatt_table
Date: Fri, 12 Jun 2015 09:57:11 +0300 [thread overview]
Message-ID: <1434092231-4155-1-git-send-email-kda@linux-powerpc.org> (raw)
Fix the memory leak in create_gatt_table:
we've lost a kfree on the exit path for the pages array allocated
in uninorth_create_gatt_table
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
---
drivers/char/agp/uninorth-agp.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/char/agp/uninorth-agp.c b/drivers/char/agp/uninorth-agp.c
index a56ee9b..0575544 100644
--- a/drivers/char/agp/uninorth-agp.c
+++ b/drivers/char/agp/uninorth-agp.c
@@ -361,6 +361,10 @@ static int agp_uninorth_resume(struct pci_dev *pdev)
}
#endif /* CONFIG_PM */
+static struct {
+ struct page **pages_arr;
+} uninorth_priv;
+
static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
{
char *table;
@@ -371,7 +375,6 @@ static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
int i;
void *temp;
struct page *page;
- struct page **pages;
/* We can't handle 2 level gatt's */
if (bridge->driver->size_type == LVL2_APER_SIZE)
@@ -400,8 +403,8 @@ static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
if (table == NULL)
return -ENOMEM;
- pages = kmalloc((1 << page_order) * sizeof(struct page*), GFP_KERNEL);
- if (pages == NULL)
+ uninorth_priv.pages_arr = kmalloc((1 << page_order) * sizeof(struct page*), GFP_KERNEL);
+ if (uninorth_priv.pages_arr == NULL)
goto enomem;
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
@@ -409,14 +412,14 @@ static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
for (page = virt_to_page(table), i = 0; page <= virt_to_page(table_end);
page++, i++) {
SetPageReserved(page);
- pages[i] = page;
+ uninorth_priv.pages_arr[i] = page;
}
bridge->gatt_table_real = (u32 *) table;
/* Need to clear out any dirty data still sitting in caches */
flush_dcache_range((unsigned long)table,
(unsigned long)table_end + 1);
- bridge->gatt_table = vmap(pages, (1 << page_order), 0, PAGE_KERNEL_NCG);
+ bridge->gatt_table = vmap(uninorth_priv.pages_arr, (1 << page_order), 0, PAGE_KERNEL_NCG);
if (bridge->gatt_table == NULL)
goto enomem;
@@ -434,7 +437,7 @@ static int uninorth_create_gatt_table(struct agp_bridge_data *bridge)
return 0;
enomem:
- kfree(pages);
+ kfree(uninorth_priv.pages_arr);
if (table)
free_pages((unsigned long)table, page_order);
return -ENOMEM;
@@ -456,6 +459,7 @@ static int uninorth_free_gatt_table(struct agp_bridge_data *bridge)
*/
vunmap(bridge->gatt_table);
+ kfree(uninorth_priv.pages_arr);
table = (char *) bridge->gatt_table_real;
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
--
2.4.0
next reply other threads:[~2015-06-12 7:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-12 6:57 Denis Kirjanov [this message]
2015-06-18 14:34 ` [PATCH] agp/uninorth: fix a memleak in create_gatt_table Denis Kirjanov
2015-06-19 1:08 ` Benjamin Herrenschmidt
2015-09-07 7:30 ` Denis Kirjanov
2015-09-07 10:28 ` Michael Ellerman
2015-09-07 10:39 ` Denis Kirjanov
2015-09-08 3:51 ` Michael Ellerman
2015-10-02 8:48 ` Denis Kirjanov
2015-10-12 11:17 ` Michael Ellerman
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