[PATCH] mm/zswap: fix potential memory leak
From: Tian Tao <tiantao6@hisilicon.com>
Date: 2021-01-25 01:33:16
Subsystem:
memory management, the rest, zswap compressed swap caching · Maintainers:
Andrew Morton, Linus Torvalds, Johannes Weiner, Yosry Ahmed, Nhat Pham
If entry is NULL, the requested memory tmp should be freed, otherwise it may cause a memory leak. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Reported-by: Dan Carpenter <redacted> --- mm/zswap.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/mm/zswap.c b/mm/zswap.c
index 42d13dd..8d1381b 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c@@ -961,6 +961,7 @@ static int zswap_writeback_entry(struct zpool *pool, unsigned long handle) /* entry was invalidated */ spin_unlock(&tree->lock); zpool_unmap_handle(pool, handle); + kfree(tmp); return 0; } spin_unlock(&tree->lock);
--
2.7.4