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From: Alexandra Winter <wintera@linux.ibm.com>
To: David Miller <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Eric Dumazet <edumazet@google.com>
Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org,
	Heiko Carstens <hca@linux.ibm.com>,
	Thorsten Winkler <twinkler@linux.ibm.com>,
	Jules Irenge <jbi.octave@gmail.com>,
	Alexandra Winter <wintera@linux.ibm.com>
Subject: [PATCH net-next 2/4] s390/lcs: Convert sprintf to scnprintf
Date: Tue, 20 Jun 2023 10:34:09 +0200	[thread overview]
Message-ID: <20230620083411.508797-3-wintera@linux.ibm.com> (raw)
In-Reply-To: <20230620083411.508797-1-wintera@linux.ibm.com>

From: Thorsten Winkler <twinkler@linux.ibm.com>

This LWN article explains the rationale for this change
https: //lwn.net/Articles/69419/
Ie. snprintf() returns what *would* be the resulting length,
while scnprintf() returns the actual length.

Reported-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Thorsten Winkler <twinkler@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
---
 drivers/s390/net/lcs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/s390/net/lcs.h b/drivers/s390/net/lcs.h
index bd52caa3b11b..a2699b70b050 100644
--- a/drivers/s390/net/lcs.h
+++ b/drivers/s390/net/lcs.h
@@ -21,7 +21,7 @@ do { \
 #define LCS_DBF_TEXT_(level,name,text...) \
 	do { \
 		if (debug_level_enabled(lcs_dbf_##name, level)) { \
-			sprintf(debug_buffer, text); \
+			scnprintf(debug_buffer, sizeof(debug_buffer), text); \
 			debug_text_event(lcs_dbf_##name, level, debug_buffer); \
 		} \
 	} while (0)
-- 
2.39.2


  parent reply	other threads:[~2023-06-20  8:35 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-20  8:34 [PATCH net-next 0/4] s390/net: updates 2023-06-10 Alexandra Winter
2023-06-20  8:34 ` [PATCH net-next 1/4] s390/lcs: Convert sysfs sprintf to sysfs_emit Alexandra Winter
2023-06-20 19:17   ` Simon Horman
2023-06-20  8:34 ` Alexandra Winter [this message]
2023-06-20 19:16   ` [PATCH net-next 2/4] s390/lcs: Convert sprintf to scnprintf Simon Horman
2023-06-21 13:49     ` Alexandra Winter
2023-06-20  8:34 ` [PATCH net-next 3/4] s390/ctcm: Convert sysfs sprintf to sysfs_emit Alexandra Winter
2023-06-20 19:17   ` Simon Horman
2023-06-20  8:34 ` [PATCH net-next 4/4] s390/ctcm: Convert sprintf/snprintf to scnprintf Alexandra Winter

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