linux-kernel - [PATCH] crypto: aspeed - fix double free caused by devm

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20251020101109.1030-1-vulab@iscas.ac.cn>
Date: Mon, 20 Oct 2025 18:11:09 +0800
From: Haotian Zhang <vulab@...as.ac.cn>
To: neal_liu@...eedtech.com,
	herbert@...dor.apana.org.au,
	davem@...emloft.net
Cc: joel@....id.au,
	andrew@...econstruct.com.au,
	linux-aspeed@...ts.ozlabs.org,
	linux-crypto@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Haotian Zhang <vulab@...as.ac.cn>
Subject: [PATCH] crypto: aspeed - fix double free caused by devm

The clock obtained via devm_clk_get_enabled() is automatically managed
by devres and will be disabled and freed on driver detach. Manually
calling clk_disable_unprepare() in error path and remove function
causes double free.

Remove the manual clock cleanup in both aspeed_acry_probe()'s error
path and aspeed_acry_remove().

Fixes: 2f1cf4e50c95 ("crypto: aspeed - Add ACRY RSA driver")
Signed-off-by: Haotian Zhang <vulab@...as.ac.cn>
---
 drivers/crypto/aspeed/aspeed-acry.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/crypto/aspeed/aspeed-acry.c b/drivers/crypto/aspeed/aspeed-acry.c
index 8d1c79aaca07..5993bcba9716 100644
--- a/drivers/crypto/aspeed/aspeed-acry.c
+++ b/drivers/crypto/aspeed/aspeed-acry.c
@@ -787,7 +787,6 @@ static int aspeed_acry_probe(struct platform_device *pdev)
 err_engine_rsa_start:
 	crypto_engine_exit(acry_dev->crypt_engine_rsa);
 clk_exit:
-	clk_disable_unprepare(acry_dev->clk);
 
 	return rc;
 }
@@ -799,7 +798,6 @@ static void aspeed_acry_remove(struct platform_device *pdev)
 	aspeed_acry_unregister(acry_dev);
 	crypto_engine_exit(acry_dev->crypt_engine_rsa);
 	tasklet_kill(&acry_dev->done_task);
-	clk_disable_unprepare(acry_dev->clk);
 }
 
 MODULE_DEVICE_TABLE(of, aspeed_acry_of_matches);
-- 
2.25.1