Commit b31459ad authored Dec 09, 2013 by Jon Medhurst Committed by Russell King Dec 09, 2013

ARM: 7917/1: cacheflush: correctly limit range of memory region being flushed



The __do_cache_op function operates with a 'chunk' size of one page
but fails to limit the size of the final chunk so as to not exceed
the specified memory region. Fix this.

Cc: <stable@vger.kernel.org>
Reported-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Tested-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 3abb6671

arch/arm/kernel/traps.c

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -509,9 +509,10 @@ static inline int
	__do_cache_op(unsigned long start, unsigned long end)		__do_cache_op(unsigned long start, unsigned long end)
	{		{
	int ret;		int ret;
	unsigned long chunk = PAGE_SIZE;

	do {		do {
			unsigned long chunk = min(PAGE_SIZE, end - start);

	if (signal_pending(current)) {		if (signal_pending(current)) {
	struct thread_info *ti = current_thread_info();		struct thread_info *ti = current_thread_info();