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(parent: a413a1a) | patch
powerpc/ptrace: Preserve previous fprs/vsrs on short regset write
authorDave Martin <Dave.Martin@arm.com>
Thu, 5 Jan 2017 16:50:57 +0000 (16:50 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Fri, 20 Jan 2017 03:54:43 +0000 (14:54 +1100)
commit952fef84072acfcb210c7509c7238dce3caf2207
treed63db8f9b737a2a2cac0e70a030dbfb5cc3fc007tree | snapshot
parenta413a1a208242cc3808c93a0e2bc8f18b4ed5ad6commit | diff
powerpc/ptrace: Preserve previous fprs/vsrs on 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.

Fixes: a397e33dfdc6 ("powerpc: Introduce VSX thread_struct and CONFIG_VSX")
Cc: stable@vger.kernel.org # v2.6.27+
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/ptrace.c diff | blob | history
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