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

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commit bd50a974097bb82d52a458bd3ee39fb723129a0c upstream.

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: ff86aae3b4 ("devres: add devm_alloc_percpu()")
Cc: stable@vger.kernel.org
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/1719931914-19035-3-git-send-email-quic_zijuhu@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zijun Hu
2024-07-02 22:51:51 +08:00
committed by Greg Kroah-Hartman
parent 4aac65f39c
commit 3dcd0673e4
1 changed files with 5 additions and 1 deletions
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6
drivers/base/devres.c
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@@ -1221,7 +1221,11 @@ EXPORT_SYMBOL_GPL(__devm_alloc_percpu);
*/ */
void devm_free_percpu(struct device *dev, void __percpu *pdata) 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)); (__force void *)pdata));
} }
EXPORT_SYMBOL_GPL(devm_free_percpu); EXPORT_SYMBOL_GPL(devm_free_percpu);