linux-kernel - [PATCH 6.1 136/451] s390/pai: fix attr_event_free upper limit for pai device drivers

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: <20240324231207.1351418-137-sashal@kernel.org>
Date: Sun, 24 Mar 2024 19:06:52 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Thomas Richter <tmricht@...ux.ibm.com>,
	Sumanth Korikkar <sumanthk@...ux.ibm.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.1 136/451] s390/pai: fix attr_event_free upper limit for pai device drivers

From: Thomas Richter <tmricht@...ux.ibm.com>

[ Upstream commit 225d09d6e5f3870560665a1829d2db79330b4c58 ]

When the device drivers are initialized, a sysfs directory
is created. This contains many attributes which are allocated with
kzalloc(). Should it fail, the memory for the attributes already
created is freed in attr_event_free(). Its second parameter is number
of attribute elements to delete. This parameter is off by one.
When i. e. the 10th attribute fails to get created, attributes
numbered 0 to 9 should be deleted. Currently only attributes
numbered 0 to 8 are deleted.

Fixes: 39d62336f5c1 ("s390/pai: add support for cryptography counters")
Reported-by: Sumanth Korikkar <sumanthk@...ux.ibm.com>
Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@...ux.ibm.com>
Signed-off-by: Heiko Carstens <hca@...ux.ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/s390/kernel/perf_pai_crypto.c | 2 +-
 arch/s390/kernel/perf_pai_ext.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai_crypto.c
index 6826e2a69a216..f61a652046cfb 100644
--- a/arch/s390/kernel/perf_pai_crypto.c
+++ b/arch/s390/kernel/perf_pai_crypto.c
@@ -647,7 +647,7 @@ static int __init attr_event_init(void)
 	for (i = 0; i < ARRAY_SIZE(paicrypt_ctrnames); i++) {
 		ret = attr_event_init_one(attrs, i);
 		if (ret) {
-			attr_event_free(attrs, i - 1);
+			attr_event_free(attrs, i);
 			return ret;
 		}
 	}
diff --git a/arch/s390/kernel/perf_pai_ext.c b/arch/s390/kernel/perf_pai_ext.c
index 74b53c531e0cd..b4d89654183a2 100644
--- a/arch/s390/kernel/perf_pai_ext.c
+++ b/arch/s390/kernel/perf_pai_ext.c
@@ -612,7 +612,7 @@ static int __init attr_event_init(void)
 	for (i = 0; i < ARRAY_SIZE(paiext_ctrnames); i++) {
 		ret = attr_event_init_one(attrs, i);
 		if (ret) {
-			attr_event_free(attrs, i - 1);
+			attr_event_free(attrs, i);
 			return ret;
 		}
 	}
-- 
2.43.0