Files
linux/include/linux
Dan Williams 1d91c1d2c8 nospec: Kill array_index_nospec_mask_check()
There are multiple problems with the dynamic sanity checking in
array_index_nospec_mask_check():

* It causes unnecessary overhead in the 32-bit case since integer sized
  @index values will no longer cause the check to be compiled away like
  in the 64-bit case.

* In the 32-bit case it may trigger with user controllable input when
  the expectation is that should only trigger during development of new
  kernel enabling.

* The macro reuses the input parameter in multiple locations which is
  broken if someone passes an expression like 'index++' to
  array_index_nospec().

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/151881604278.17395.6605847763178076520.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-02-17 08:40:59 +01:00
..
2017-11-28 16:30:38 +01:00
2018-01-01 22:54:42 -08:00
2018-01-02 13:59:16 -05:00
2017-11-30 16:55:35 +00:00
2018-02-06 18:32:44 -08:00
2017-11-15 18:21:04 -08:00
2017-12-19 16:35:34 -08:00
2018-01-03 14:03:48 +01:00
2017-08-24 13:23:03 -07:00
2017-11-27 16:19:56 -05:00
2017-07-17 13:42:48 +02:00
2018-01-01 12:40:27 -07:00
2018-01-25 14:10:39 -08:00
2017-08-07 17:22:14 +02:00
2017-11-13 01:41:20 +01:00
2017-11-15 18:21:06 -08:00
2018-01-16 00:04:19 +01:00
2018-02-06 16:41:29 -05:00
2017-06-21 14:37:12 -04:00
2018-01-17 11:30:16 +00:00
2017-11-15 18:21:05 -08:00
2017-12-29 21:13:04 +01:00
2017-11-17 16:10:04 -08:00
2017-11-15 18:21:01 -08:00
2017-12-01 13:09:40 -08:00
2017-10-07 10:45:02 -06:00
2017-08-28 20:51:22 +02:00
2018-01-03 11:00:22 -05:00
2018-01-31 17:18:38 -08:00
2017-11-17 16:10:00 -08:00
2018-01-28 22:17:24 -05:00
2017-07-25 18:05:25 +02:00
2018-01-08 08:22:45 -06:00
2018-01-17 15:25:50 +01:00
2018-01-25 08:48:20 -06:00
2018-01-08 08:22:45 -06:00
2017-12-14 16:00:49 -08:00
2018-01-31 17:18:40 -08:00
2017-11-15 18:21:06 -08:00
2018-01-31 17:18:37 -08:00
2017-11-09 10:23:28 +01:00
2018-02-01 11:40:07 -06:00
2018-01-19 16:50:53 -08:00
2017-11-17 16:10:04 -08:00
2017-11-17 16:10:04 -08:00
2017-11-13 01:33:48 +01:00
2017-12-16 02:05:48 +01:00
2018-02-06 16:41:28 -05:00
2017-12-11 14:37:11 -07:00
2017-11-29 22:16:31 +01:00
2017-11-07 12:22:21 +01:00
2017-07-06 16:24:30 -07:00
2018-01-29 12:02:54 -05:00
2018-01-18 11:56:49 +01:00
2018-01-15 12:07:46 -08:00
2018-01-15 09:35:45 +01:00
2018-02-06 18:32:47 -08:00
2018-01-09 16:27:43 +01:00
2017-10-11 22:36:54 -04:00
2018-02-06 18:32:44 -08:00
2017-12-20 09:53:54 -07:00
2017-10-04 10:29:22 +02:00
2017-11-27 16:19:54 -05:00
2017-08-15 09:02:07 -07:00
2017-08-15 09:02:08 -07:00