diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-01-24 08:05:52 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-01-24 08:33:40 +0100 |
| commit | 9dce990d2cf57b5ed4e71a9cdbd7eae4335111ff (patch) | |
| tree | dfc3c82b1c6ddec3df7c0ebfcef53928d2ed2f4c | |
| parent | a4685d2f58e2230d4e27fb2ee581d7ea35e5d046 (diff) | |
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>