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: <20230603021558.95299-8-jhubbard@nvidia.com>
Date:   Fri, 2 Jun 2023 19:15:54 -0700
From:   John Hubbard <jhubbard@...dia.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     David Hildenbrand <david@...hat.com>, Peter Xu <peterx@...hat.com>,
        "Shuah Khan" <shuah@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>, <linux-mm@...ck.org>,
        <linux-kselftest@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        John Hubbard <jhubbard@...dia.com>
Subject: [PATCH v2 07/11] selftests/mm: fix a "possibly uninitialized" warning in pkey-x86.h

This fixes a real bug, too, because xstate_size()  was assuming that
the stack variable xstate_size was initialized to zero. That's not
guaranteed nor even especially likely.

Reviewed-by: David Hildenbrand <david@...hat.com>
Cc: Peter Xu <peterx@...hat.com>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 tools/testing/selftests/mm/pkey-x86.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/pkey-x86.h b/tools/testing/selftests/mm/pkey-x86.h
index 72c14cd3ddc7..e32ae8a1cd99 100644
--- a/tools/testing/selftests/mm/pkey-x86.h
+++ b/tools/testing/selftests/mm/pkey-x86.h
@@ -132,7 +132,7 @@ int pkey_reg_xstate_offset(void)
 	unsigned int ecx;
 	unsigned int edx;
 	int xstate_offset;
-	int xstate_size;
+	int xstate_size = 0;
 	unsigned long XSTATE_CPUID = 0xd;
 	int leaf;
 
-- 
2.40.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ