linux-kernel - [PATCH AUTOSEL 5.4 25/46] pstore/platform: fix potential mem leak if pstore_init

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Message-Id: <20200410034909.8922-25-sashal@kernel.org>
Date:   Thu,  9 Apr 2020 23:48:48 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     chenqiwu <chenqiwu@...omi.com>, Kees Cook <keescook@...omium.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.4 25/46] pstore/platform: fix potential mem leak if pstore_init_fs failed

From: chenqiwu <chenqiwu@...omi.com>

[ Upstream commit 8a57d6d4ddfa41c49014e20493152c41a38fcbf8 ]

There is a potential mem leak when pstore_init_fs failed,
since the pstore compression maybe unlikey to initialized
successfully. We must clean up the allocation once this
unlikey issue happens.

Signed-off-by: chenqiwu <chenqiwu@...omi.com>
Link: https://lore.kernel.org/r/1581068800-13817-1-git-send-email-qiwuchen55@gmail.com
Signed-off-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/pstore/platform.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 3d7024662d295..cdf5b8ae2583c 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -823,9 +823,9 @@ static int __init pstore_init(void)
 
 	ret = pstore_init_fs();
 	if (ret)
-		return ret;
+		free_buf_for_compression();
 
-	return 0;
+	return ret;
 }
 late_initcall(pstore_init);
 
-- 
2.20.1