Commit bd50a974 authored by Zijun Hu's avatar Zijun Hu Committed by Greg Kroah-Hartman
Browse files

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



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>
parent c884e324

drivers/base/devres.c

+5 −1
Original line number Diff line number Diff line
@@ -1225,7 +1225,11 @@ 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,

			       (__force void *)pdata));

}

EXPORT_SYMBOL_GPL(devm_free_percpu);