x86/fpu: Limit xstate copy size in xstateregs_set()

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If the count argument is larger than the xstate size, this will happily
copy beyond the end of xstate.

Fixes: 91c3dba7db ("x86/fpu/xstate: Fix PTRACE frames for XSAVES")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121452.120741557@linutronix.de

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Thomas Gleixner 2021-06-23 14:01:35 +02:00 • committed by Borislav Petkov

parent e68524456c

commit 07d6688b22

1 changed files with 1 additions and 1 deletions

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arch/x86/kernel/fpu/regset.c

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