Commit ed3c97dc authored by Zijun Hu's avatar Zijun Hu Committed by Zhang Zekun
Browse files

devres: Fix memory leakage caused by driver API devm_free_percpu() 

stable inclusion
from stable-v5.10.224
commit ef56dcdca8f2a53abc3a83d388b8336447533d85
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IALERD
CVE: CVE-2024-43871

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ef56dcdca8f2a53abc3a83d388b8336447533d85



-------------------------------------------------

[ Upstream commit bd50a974097bb82d52a458bd3ee39fb723129a0c ]

It will cause memory leakage when use driver API devm_free_percpu()
to free memory allocated by devm_alloc_percpu(), fixed by using
devres_release() instead of devres_destroy() within devm_free_percpu().

Fixes: ff86aae3 ("devres: add devm_alloc_percpu()")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarZijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/1719931914-19035-3-git-send-email-quic_zijuhu@quicinc.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Conflicts:
	drivers/base/devres.c
[There is a context difference, no functional change]
Signed-off-by: default avatarZhang Zekun <zhangzekun11@huawei.com>
parent 96a40671

drivers/base/devres.c

+5 −1
Original line number Diff line number Diff line
@@ -1227,7 +1227,11 @@ EXPORT_SYMBOL_GPL(__devm_alloc_percpu); 
 */

void devm_free_percpu(struct device *dev, void __percpu *pdata)

{

	WARN_ON(devres_destroy(dev, devm_percpu_release, devm_percpu_match,

	/*

	 * Use devres_release() to prevent memory leakage as

	 * devm_free_pages() does.

	 */

	WARN_ON(devres_release(dev, devm_percpu_release, devm_percpu_match,

			       (void *)pdata));

}

EXPORT_SYMBOL_GPL(devm_free_percpu);