Martin Schwidefsky 9dce990d2c s390/ptrace: Preserve previous registers for short regset write ...

Ensure that if userspace supplies insufficient data to
PTRACE_SETREGSET to fill all the registers, the thread's old
registers are preserved.

convert_vx_to_fp() is adapted to handle only a specified number of
registers rather than unconditionally handling all of them: other
callers of this function are adapted appropriately.

Based on an initial patch by Dave Martin.

Cc: stable@vger.kernel.org
Reported-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2017-01-24 08:33:40 +01:00

40 KiB

Raw Blame History

View Raw