linux-kernel - [PATCH] crypto: cavium - Fix an error handling path in cpt_ucode_load

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Message-ID: <774a441420a14d4425c4b6f6d7ae0a06c795f61d.1731086525.git.christophe.jaillet@wanadoo.fr>
Date: Fri,  8 Nov 2024 18:22:27 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: George Cherian <gcherian@...vell.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	David Daney <david.daney@...ium.com>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	George Cherian <george.cherian@...ium.com>,
	linux-crypto@...r.kernel.org
Subject: [PATCH] crypto: cavium - Fix an error handling path in cpt_ucode_load_fw()

If do_cpt_init() fails, a previous dma_alloc_coherent() call needs to be
undone.

Add the needed dma_free_coherent() before returning.

Fixes: 9e2c7d99941d ("crypto: cavium - Add Support for Octeon-tx CPT Engine")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested only.

I guess that dmam_alloc_coherent() could also be used to fix the leak.
This would simplify cpt_unload_microcode(), IIUC.
---
 drivers/crypto/cavium/cpt/cptpf_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/crypto/cavium/cpt/cptpf_main.c b/drivers/crypto/cavium/cpt/cptpf_main.c
index ec17beee24c0..54de869e5374 100644
--- a/drivers/crypto/cavium/cpt/cptpf_main.c
+++ b/drivers/crypto/cavium/cpt/cptpf_main.c
@@ -302,6 +302,8 @@ static int cpt_ucode_load_fw(struct cpt_device *cpt, const u8 *fw, bool is_ae)
 
 	ret = do_cpt_init(cpt, mcode);
 	if (ret) {
+		dma_free_coherent(&cpt->pdev->dev, mcode->code_size,
+				  mcode->code, mcode->phys_base);
 		dev_err(dev, "do_cpt_init failed with ret: %d\n", ret);
 		goto fw_release;
 	}
-- 
2.47.0