x86: Add a Kconfig option to turn the copy_from_user warnings into errors

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For automated testing it is useful to have the option to turn
the warnings on copy_from_user() etc checks into errors:

 In function ‘copy_from_user’,
     inlined from ‘fd_copyin’ at drivers/block/floppy.c:3080,
     inlined from ‘fd_ioctl’ at drivers/block/floppy.c:3503:
   linux/arch/x86/include/asm/uaccess_32.h:213:
  error: call to ‘copy_from_user_overflow’ declared with attribute error:
  copy_from_user buffer size is not provably correct

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20091002075050.4e9f7641@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Arjan van de Ven 2009-10-02 07:50:50 -07:00 • committed by Ingo Molnar

parent 4a31276930

commit 63312b6a6f

4 changed files with 21 additions and 1 deletions

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14

arch/x86/Kconfig.debug

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4

arch/x86/include/asm/uaccess_32.h

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1

include/linux/compiler-gcc4.h

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3

include/linux/compiler.h

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