nospec: Allow getting/setting on non-current task

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commit 7bbf1373e2 upstream

Adjust arch_prctl_get/set_spec_ctrl() to operate on tasks other than
current.

This is needed both for /proc/$pid/status queries and for seccomp (since
thread-syncing can trigger seccomp in non-current threads).

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Kees Cook 2018-05-01 15:19:04 -07:00 • committed by Greg Kroah-Hartman

parent d855391162

commit 7d1254a148

3 changed files with 26 additions and 17 deletions

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27

arch/x86/kernel/cpu/bugs.c

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7

include/linux/nospec.h

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9

kernel/sys.c

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