x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too

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  a7e1f67ed2 ("x86/msr: Filter MSR writes")

introduced a module parameter to disable writing to the MSR device file
and tainted the kernel upon writing. As MSR registers can be written by
the X86_IOC_WRMSR_REGS ioctl too, the same filtering and tainting should
be applied to the ioctl as well.

 [ bp: Massage commit message and space out statements. ]

Fixes: a7e1f67ed2 ("x86/msr: Filter MSR writes")
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210127122456.13939-1-misono.tomohiro@jp.fujitsu.com

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Misono Tomohiro 2021-01-27 21:24:56 +09:00 • committed by Borislav Petkov

parent 443121b3eb

commit 02a16aa135

1 changed files with 7 additions and 0 deletions

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arch/x86/kernel/msr.c

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