linux-kernel - [PATCH] pstore/ram: Fix memory leak in persistent_ram

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Date:   Wed, 11 Dec 2019 13:13:51 -0600
From:   Navid Emamdoost <navid.emamdoost@...il.com>
To:     Kees Cook <keescook@...omium.org>,
        Anton Vorontsov <anton.vorontsov@...aro.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     emamd001@....edu, Navid Emamdoost <navid.emamdoost@...il.com>
Subject: [PATCH] pstore/ram: Fix memory leak in persistent_ram_new

In the implementation of persistent_ram_new(), if the allocation for prz
fails, "label" should be released as part of error handling. Release the
label via kfree().

Fixes: 8cf5aff89e59 ("staging: android: persistent_ram: Introduce persistent_ram_new()")
Signed-off-by: Navid Emamdoost <navid.emamdoost@...il.com>
---
 fs/pstore/ram_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index 8823f65888f0..7d2d86999211 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -568,6 +568,7 @@ struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
 	prz = kzalloc(sizeof(struct persistent_ram_zone), GFP_KERNEL);
 	if (!prz) {
 		pr_err("failed to allocate persistent ram zone\n");
+		kfree(label);
 		goto err;
 	}
 
-- 
2.17.1