linux-kernel - [PATCH v3] afs: Fix memory leak in afs_put

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Message-ID: <20200602013045.321855-1-chengzhihao1@huawei.com>
Date:   Tue, 2 Jun 2020 09:30:45 +0800
From:   Zhihao Cheng <chengzhihao1@...wei.com>
To:     <linux-afs@...ts.infradead.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <dhowells@...hat.com>, <yi.zhang@...wei.com>
Subject: [PATCH v3] afs: Fix memory leak in afs_put_sysnames()

Fix afs_put_sysnames() to actually free the specified afs_sysnames
object after its reference count has been decreased to zero and
its contents have been released.

Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
Cc: <Stable@...r.kernel.org> # v4.17+
Fixes: 6f8880d8e681557 ("afs: Implement @sys substitution handling")
---
 fs/afs/proc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 468e1713bce1..6f34c84a0fd0 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -563,6 +563,7 @@ void afs_put_sysnames(struct afs_sysnames *sysnames)
 			if (sysnames->subs[i] != afs_init_sysname &&
 			    sysnames->subs[i] != sysnames->blank)
 				kfree(sysnames->subs[i]);
+		kfree(sysnames);
 	}
 }
 
-- 
2.25.4