linux-kernel - [PATCH] sgl_alloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 20 Sep 2020 01:36:07 -0400
From:   Douglas Gilbert <dgilbert@...erlog.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-block@...r.kernel.org, axboe@...nel.dk
Subject: [PATCH] sgl_alloc_order: memory leak

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@...erlog.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