[AGPGART] Prevent (unlikely) memory leak in amd_create_gatt_pages()

If we fail an alloc, unwind the previous allocs that succeeded.

Spotted-by: Alan Grimes <agrimes@speakeasy.net>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/char/agp/amd-k7-agp.c b/drivers/char/agp/amd-k7-agp.c
index 51d0d562d0..c85c8cadb6 100644
--- a/drivers/char/agp/amd-k7-agp.c
+++ b/drivers/char/agp/amd-k7-agp.c
@@ -101,6 +101,11 @@ static int amd_create_gatt_pages(int nr_tables)
         for (i = 0; i < nr_tables; i++) {
                 entry = kzalloc(sizeof(struct amd_page_map), GFP_KERNEL);
                 if (entry == NULL) {
+                        while (i > 0) {
+                                kfree(tables[i-1]);
+                                i--;
+                        }
+                        kfree(tables);
                         retval = -ENOMEM;
                         break;
                 }