linux-kernel - [PATCH v2] crypto: caam: fix error reporting

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

Message-ID: <1415179284-19791-1-git-send-email-cristian.stoica@freescale.com>
Date:	Wed, 5 Nov 2014 11:21:24 +0200
From:	Cristian Stoica <cristian.stoica@...escale.com>
To:	<herbert@...dor.apana.org.au>, <davem@...emloft.net>,
	<linux-crypto@...r.kernel.org>, <kim.phillips@...escale.com>
CC:	<linux-kernel@...r.kernel.org>, <horia.geanta@...escale.com>,
	<marex@...x.de>, Cristian Stoica <cristian.stoica@...escale.com>
Subject: [PATCH v2] crypto: caam: fix error reporting

The error code returned by hardware is four bits wide with an expected
zero MSB. A hardware error condition where the error code can get between
0x8 and 0xf will trigger an out of bound array access on the error
message table.
This patch fixes the invalid array access following such an error and
reports the condition.

Signed-off-by: Cristian Stoica <cristian.stoica@...escale.com>
---
 drivers/crypto/caam/error.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/caam/error.c b/drivers/crypto/caam/error.c
index 6531054..66d73bf 100644
--- a/drivers/crypto/caam/error.c
+++ b/drivers/crypto/caam/error.c
@@ -213,27 +213,36 @@ void caam_jr_strstatus(struct device *jrdev, u32 status)
 		void (*report_ssed)(struct device *jrdev, const u32 status,
 				    const char *error);
 		const char *error;
-	} status_src[] = {
+	} status_src[16] = {
 		{ NULL, "No error" },
 		{ NULL, NULL },
 		{ report_ccb_status, "CCB" },
 		{ report_jump_status, "Jump" },
 		{ report_deco_status, "DECO" },
-		{ NULL, NULL },
+		{ NULL, "Queue Manager Interface" },
 		{ report_jr_status, "Job Ring" },
 		{ report_cond_code_status, "Condition Code" },
+		{ NULL, NULL },
+		{ NULL, NULL },
+		{ NULL, NULL },
+		{ NULL, NULL },
+		{ NULL, NULL },
+		{ NULL, NULL },
+		{ NULL, NULL },
+		{ NULL, NULL },
 	};
 	u32 ssrc = status >> JRSTA_SSRC_SHIFT;
 	const char *error = status_src[ssrc].error;
 
 	/*
-	 * If there is no further error handling function, just
-	 * print the error code, error string and exit. Otherwise
-	 * call the handler function.
+	 * If there is an error handling function, call it to report the error.
+	 * Otherwise print the error source name.
 	 */
-	if (!status_src[ssrc].report_ssed)
-		dev_err(jrdev, "%08x: %s: \n", status, status_src[ssrc].error);
-	else
+	if (status_src[ssrc].report_ssed)
 		status_src[ssrc].report_ssed(jrdev, status, error);
+	else if (error)
+		dev_err(jrdev, "%d: %s\n", ssrc, error);
+	else
+		dev_err(jrdev, "%d: unknown error source\n", ssrc);
 }
 EXPORT_SYMBOL(caam_jr_strstatus);
-- 
1.8.3.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/