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Message-ID: <20110304141924.GD30317@asset.uwaterloo.ca> Date: Fri, 4 Mar 2011 09:19:24 -0500 From: chenliu@...et.uwaterloo.ca To: schwidefsky@...ibm.com, heiko.carstens@...ibm.com, linux-kernel@...r.kernel.org Subject: [PATCH 1/2]early: fix possible overlapping data buffer This patch fixes bugzilla #12965: https://bugzilla.kernel.org/show_bug.cgi?id=12965 The original code contains dangerous uses of sprintf functions like sprintf(defsys_cmd, "%s EW MINSIZE=%.7iK PARMREGS=0-13", defsys_cmd, min_size), where defsys_cmd is defined as a fixed length buffer. Replace them with snprintf can fix such issues. Signed-off-by: Chen Liu <chenliunju@...il.com> --- arch/s390/kernel/early.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c --- a/arch/s390/kernel/early.c 2010-09-04 23:28:51.706415118 -0400 +++ b/arch/s390/kernel/early.c 2011-03-03 23:22:53.783164331 -0500 @@ -133,8 +133,8 @@ static noinline __init void create_kerne sinitrd_pfn = PFN_DOWN(__pa(INITRD_START)); einitrd_pfn = PFN_UP(__pa(INITRD_START + INITRD_SIZE)); min_size = einitrd_pfn << 2; - sprintf(defsys_cmd, "%s EW %.5X-%.5X", defsys_cmd, - sinitrd_pfn, einitrd_pfn); + snprintf(defsys_cmd, sizeof(defsys_cmd), "%s EW %.5X-%.5X", + defsys_cmd, sinitrd_pfn, einitrd_pfn); } #endif -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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