3.12-stable review patch. If anyone has any objections, please let me know.
------------------ From: Jon Medhurst <[email protected]> commit b31459adeab018b297541e288ac88873011da82a upstream. 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. Reported-by: Christian Gmeiner <[email protected]> Tested-by: Christian Gmeiner <[email protected]> Acked-by: Will Deacon <[email protected]> Signed-off-by: Jon Medhurst <[email protected]> Signed-off-by: Russell King <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/arm/kernel/traps.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -503,9 +503,10 @@ static inline int __do_cache_op(unsigned long start, unsigned long end) { int ret; - unsigned long chunk = PAGE_SIZE; do { + unsigned long chunk = min(PAGE_SIZE, end - start); + if (signal_pending(current)) { struct thread_info *ti = current_thread_info(); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
