linux-kernel - [PATCH 4.19 041/113] ipmi: ipmi_si_hardcode.c: init si

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: <20190515090656.736553667@linuxfoundation.org>
Date:   Wed, 15 May 2019 12:55:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tony Camuso <tcamuso@...hat.com>,
        Corey Minyard <cminyard@...sta.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 041/113] ipmi: ipmi_si_hardcode.c: init si_type array to fix a crash

[ Upstream commit a885bcfd152f97b25005298ab2d6b741aed9b49c ]

The intended behavior of function ipmi_hardcode_init_one() is to default
to kcs interface when no type argument is presented when initializing
ipmi with hard coded addresses.

However, the array of char pointers allocated on the stack by function
ipmi_hardcode_init() was not inited to zeroes, so it contained stack
debris.

Consequently, passing the cruft stored in this array to function
ipmi_hardcode_init_one() caused a crash when it was unable to detect
that the char * being passed was nonsense and tried to access the
address specified by the bogus pointer.

The fix is simply to initialize the si_type array to zeroes, so if
there were no type argument given to at the command line, function
ipmi_hardcode_init_one() could properly default to the kcs interface.

Signed-off-by: Tony Camuso <tcamuso@...hat.com>
Message-Id: <1554837603-40299-1-git-send-email-tcamuso@...hat.com>
Signed-off-by: Corey Minyard <cminyard@...sta.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/char/ipmi/ipmi_si_hardcode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/char/ipmi/ipmi_si_hardcode.c b/drivers/char/ipmi/ipmi_si_hardcode.c
index 9ae2405c28bbd..0c28e872ad3ae 100644
--- a/drivers/char/ipmi/ipmi_si_hardcode.c
+++ b/drivers/char/ipmi/ipmi_si_hardcode.c
@@ -200,6 +200,8 @@ void __init ipmi_hardcode_init(void)
 	char *str;
 	char *si_type[SI_MAX_PARMS];

+	memset(si_type, 0, sizeof(si_type));
+
 	/* Parse out the si_type string into its components. */
 	str = si_type_str;
 	if (*str != '\0') {
-- 
2.20.1