linux-kernel - [PATCH AUTOSEL 4.14 16/95] s390/pkey: add one more argument space for debug feature entry

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Date:   Tue,  7 May 2019 01:37:05 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Harald Freudenberger <freude@...ux.ibm.com>,
        Christian Rund <Christian.Rund@...ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Sasha Levin <sashal@...nel.org>, linux-s390@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 16/95] s390/pkey: add one more argument space for debug feature entry

From: Harald Freudenberger <freude@...ux.ibm.com>

[ Upstream commit 6b1f16ba730d4c0cda1247568c3a1bf4fa3a2f2f ]

The debug feature entries have been used with up to 5 arguents
(including the pointer to the format string) but there was only
space reserved for 4 arguemnts. So now the registration does
reserve space for 5 times a long value.

This fixes a sometime appearing weired value as the last
value of an debug feature entry like this:

... pkey_sec2protkey zcrypt_send_cprb (cardnr=10 domain=12)
   failed with errno -2143346254

Signed-off-by: Harald Freudenberger <freude@...ux.ibm.com>
Reported-by: Christian Rund <Christian.Rund@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/s390/crypto/pkey_api.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
index f61fa47135a6..bd0376dc7e1e 100644
--- a/drivers/s390/crypto/pkey_api.c
+++ b/drivers/s390/crypto/pkey_api.c
@@ -49,7 +49,8 @@ static debug_info_t *debug_info;
 
 static void __init pkey_debug_init(void)
 {
-	debug_info = debug_register("pkey", 1, 1, 4 * sizeof(long));
+	/* 5 arguments per dbf entry (including the format string ptr) */
+	debug_info = debug_register("pkey", 1, 1, 5 * sizeof(long));
 	debug_register_view(debug_info, &debug_sprintf_view);
 	debug_set_level(debug_info, 3);
 }
-- 
2.20.1