s390/kernel: fix ptrace peek/poke for floating point registers

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git commit 155e839a81
"s390/kernel: dynamically allocate FP register save area"
introduced a regression in regard to ptrace.

If the vector register extension is not present or unused the
ptrace peek of a floating pointer register return incorrect data
and the ptrace poke to a floating pointer register overwrites the
task structure starting at task->thread.fpu.fprs.

Cc: stable@kernel.org # v4.3
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Martin Schwidefsky 2015-10-27 13:13:38 +01:00

parent ef12cb904e

commit 55a423b6f1

1 changed files with 4 additions and 4 deletions

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arch/s390/kernel/ptrace.c

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