x86/uaccess, sched/preempt: Verify access_ok() context

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I recently encountered wreckage because access_ok() was used where it
should not be, add an explicit WARN when access_ok() is used wrongly.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

...

This commit is contained in:

Peter Zijlstra 2016-11-22 10:57:15 +01:00 • committed by Ingo Molnar

parent 0a21fc1214

commit 7c4788950b

2 changed files with 24 additions and 10 deletions

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13

arch/x86/include/asm/uaccess.h

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21

include/linux/preempt.h

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