linux-kernel - [PATCH -next] nvmem: core: Fix memleak in nvmem

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Message-ID: <20220716075352.2622809-1-cuigaosheng1@huawei.com>
Date:   Sat, 16 Jul 2022 15:53:52 +0800
From:   Gaosheng Cui <cuigaosheng1@...wei.com>
To:     <cuigaosheng1@...wei.com>, <srinivas.kandagatla@...aro.org>,
        <gregkh@...uxfoundation.org>
CC:     <linux-kernel@...r.kernel.org>, <gongruiqi1@...wei.com>,
        <wangweiyang2@...wei.com>
Subject: [PATCH -next] nvmem: core: Fix memleak in nvmem_register()

dev_set_name will alloc memory for nvmem->dev.kobj.name in
nvmem_register, when nvmem_validate_keepouts failed, nvmem's
memory will be freed and return, but nobody will free memory
for nvmem->dev.kobj.name, there will be memleak, so using
kfree_const(nvmem->dev.kobj.name) to fix it.

Fixes: de0534df9347 ("nvmem: core: fix error handling while validating keepout regions")
Signed-off-by: Gaosheng Cui <cuigaosheng1@...wei.com>
---
 drivers/nvmem/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 1e3c754efd0d..6c75c9afa5f3 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -833,6 +833,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 		rval = nvmem_validate_keepouts(nvmem);
 		if (rval) {
 			ida_free(&nvmem_ida, nvmem->id);
+			kfree_const(nvmem->dev.kobj.name);
 			kfree(nvmem);
 			return ERR_PTR(rval);
 		}
-- 
2.25.1