x86/ia32-compat: Fix CLONE_SETTLS bitness of copy_thread()
authorAndy Lutomirski <luto@amacapital.net>
Wed, 25 Feb 2015 00:01:39 +0000 (16:01 -0800)
committerIngo Molnar <mingo@kernel.org>
Wed, 25 Feb 2015 07:27:50 +0000 (08:27 +0100)
commit72c6fb4f74b6b3797f5b1abd6944d7a1d2adbf04
treec3d6cf7e1f69916cca017cebc7ea45297079476e
parent08571f1ae327bfb631cb7171bde5ea605df626c6
x86/ia32-compat: Fix CLONE_SETTLS bitness of copy_thread()

CLONE_SETTLS is expected to write a TLS entry in the GDT for
32-bit callers and to set FSBASE for 64-bit callers.

The correct check is is_ia32_task(), which returns true in the
context of a 32-bit syscall.  TIF_IA32 is set if the task itself
has a 32-bit personality, which is not the same thing.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Link: http://lkml.kernel.org/r/45e2d0d695393d76406a0c7225b82c76223e0cc5.1424822291.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/process_64.c