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usercopy: ARM NOMMU has no 64-bit get_user

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On a NOMMU ARM kernel, we get this link error:

ERROR: "__get_user_bad" [lib/test_user_copy.ko] undefined!

The problem is that the extended get_user/put_user definitions
were only added for the normal (MMU based) case.

We could add it for NOMMU as well, but it seems easier to just not
call it, since no other code needs it.

Fixes: 4c5d7bc637 ("usercopy: Add tests for all get_user() sizes")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Arnd Bergmann 2017-02-22 11:21:22 -08:00 • committed by Kees Cook
parent 4c5d7bc637
commit 4deaa6fd00
1 changed files with 2 additions and 1 deletions
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3
lib/test_user_copy.c
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@ -30,7 +30,8 @@
* As there doesn't appear to be anything that can safely determine
* their capability at compile-time, we just have to opt-out certain archs.
*/
#if BITS_PER_LONG == 64 || (!defined(CONFIG_AVR32) && \
#if BITS_PER_LONG == 64 || (!(defined(CONFIG_ARM) && !defined(MMU)) && \
!defined(CONFIG_AVR32) && \
!defined(CONFIG_BLACKFIN) && \
!defined(CONFIG_M32R) && \
!defined(CONFIG_M68K) && \