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authorCatalin Marinas <catalin.marinas@arm.com>2009-10-28 13:33:11 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2009-10-28 17:07:54 +0000
commit0587da40be78d3704a48d3e9a619183891727f5f (patch)
tree3a7e889902990c86a3c76abdf4e39c20360af47b
parenta6f5aa1ea05686ad6e84593a00a04161e6dfb3a3 (diff)
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kmemleak: Release the object lock before calling put_object()
The put_object() function may free the object if the use_count dropped to 0. There shouldn't be further accesses to such object unless it is known that the use_count is non-zero. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
-rw-r--r--mm/kmemleak.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 9610635..f06c092 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1025,11 +1025,14 @@ static void scan_block(void *_start, void *_end,
* added to the gray_list.
*/
object->count++;
- if (color_gray(object))
+ if (color_gray(object)) {
list_add_tail(&object->gray_list, &gray_list);
- else
- put_object(object);
+ spin_unlock_irqrestore(&object->lock, flags);
+ continue;
+ }
+
spin_unlock_irqrestore(&object->lock, flags);
+ put_object(object);
}
}