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(parent: e685244) | patch
x86/fpu: Limit xstate copy size in xstateregs_set()
authorThomas Gleixner <tglx@linutronix.de>
Wed, 23 Jun 2021 12:01:35 +0000 (14:01 +0200)
committerBorislav Petkov <bp@suse.de>
Wed, 23 Jun 2021 15:49:46 +0000 (17:49 +0200)
commit07d6688b22e09be465652cf2da0da6bf86154df6
tree7820606a74fabc22341548a9b3cc0ba7776c6ac4tree | snapshot
parente68524456c855e500f0a636adb1aa977e1e0b4d8commit | diff
x86/fpu: Limit xstate copy size in xstateregs_set()

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

Fixes: 91c3dba7dbc1 ("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
arch/x86/kernel/fpu/regset.c diff | blob | history
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