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From:   Douglas Gilbert <dgilbert@interlog.com>
To:     linux-kernel@vger.kernel.org
Cc:     linux-block@vger.kernel.org, axboe@kernel.dk
Subject: [PATCH] sgl_alloc_order: memory leak
Date:   Sun, 20 Sep 2020 01:36:07 -0400
Message-Id: <20200920053607.35002-1-dgilbert@interlog.com>
MIME-Version: 1.0
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Noticed that when sgl_alloc_order() failed with order > 0 that
free memory on my machine shrank. That function shouldn't call
sgl_free() on its error path since that is only correct when
order==0 .

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
---
 lib/scatterlist.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 5d63a8857f36..c448642e0f78 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -514,7 +514,7 @@ struct scatterlist *sgl_alloc_order(unsigned long long length,
 		elem_len = min_t(u64, length, PAGE_SIZE << order);
 		page = alloc_pages(gfp, order);
 		if (!page) {
-			sgl_free(sgl);
+			sgl_free_order(sgl, order);
 			return NULL;
 		}
 
-- 
2.25.1