linux-kernel - [PATCH v3 1/5] crypto: caam: Fix null dereference at error path

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Date:   Wed, 31 Jan 2018 02:00:36 +0000
From:   Bryan O'Donoghue <pure.logic@...us-software.ie>
To:     horia.geanta@....com, aymen.sghaier@....com,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     fabio.estevam@....com, peng.fan@....com, davem@...emloft.net,
        lukas.auer@...ec.fraunhofer.de, rui.silva@...aro.org,
        ryan.harkin@...aro.org, "# 4 . 12+" <stable@...r.kernel.org>,
        Bryan O'Donoghue <pure.logic@...us-software.ie>
Subject: [PATCH v3 1/5] crypto: caam: Fix null dereference at error path

From: Rui Miguel Silva <rui.silva@...aro.org>

caam_remove already removes the debugfs entry, so we need to remove the one
immediately before calling caam_remove.

This fix a NULL dereference at error paths is caam_probe fail.

[bod: changed name prefix to "crypto: caam: Fix .."]
[bod: added Fixes tag]

Fixes: 67c2315def06 ("crypto: caam - add Queue Interface (QI) backend
support")

Tested-by: Ryan Harkin <ryan.harkin@...aro.org>
Signed-off-by: Rui Miguel Silva <rui.silva@...aro.org>
Cc: "Horia Geantă" <horia.geanta@....com>
Cc: Aymen Sghaier <aymen.sghaier@....com>
Cc: Fabio Estevam <fabio.estevam@....com>
Cc: Peng Fan <peng.fan@....com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Lukas Auer <lukas.auer@...ec.fraunhofer.de>
Cc: <stable@...r.kernel.org> # 4.12+
Reviewed-by: Horia Geantă <horia.geanta@....com>
Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie>
---
 drivers/crypto/caam/ctrl.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 027e121..98986d3 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -809,9 +809,6 @@ static int caam_probe(struct platform_device *pdev)
 	return 0;
 
 caam_remove:
-#ifdef CONFIG_DEBUG_FS
-	debugfs_remove_recursive(ctrlpriv->dfs_root);
-#endif
 	caam_remove(pdev);
 	return ret;
 
-- 
2.7.4