cross-arch: don't corrupt personality flags upon exec()
authorJiri Kosina <jkosina@suse.cz>
Fri, 5 Oct 2012 00:12:20 +0000 (17:12 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 5 Oct 2012 18:04:47 +0000 (03:04 +0900)
commit16f3e95b3209c4d9080e3a3c6bb9955a0e7cfa95
tree3ea326a41bd3709d4cb23bdf89ea4084e41dc6f5
parent0d118d7f49c8aa0b74be83bc2ad134b71106cab4
cross-arch: don't corrupt personality flags upon exec()

Historically, the top three bytes of personality have been used for
things such as ADDR_NO_RANDOMIZE, which made sense only for specific
architectures.

We now however have a flag there that is general no matter the
architecture (UNAME26); generally we have to be careful to preserve the
personality flags across exec().

This patch tries to fix all architectures that forcefully overwrite
personality flags during exec() (ppc32 and s390 have been fixed recently
by commits f9783ec862ea ("[S390] Do not clobber personality flags on
exec") and 59e4c3a2fe9c ("powerpc/32: Don't clobber personality flags on
exec") in a similar way already).

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 files changed:
arch/avr32/include/asm/elf.h
arch/blackfin/include/asm/elf.h
arch/c6x/include/asm/elf.h
arch/cris/include/asm/elf.h
arch/frv/include/asm/elf.h
arch/h8300/include/asm/elf.h
arch/hexagon/include/asm/elf.h
arch/m32r/include/asm/elf.h
arch/m68k/include/asm/elf.h
arch/microblaze/include/asm/elf.h
arch/mn10300/include/asm/elf.h
arch/openrisc/include/asm/elf.h
arch/score/include/asm/elf.h
arch/sh/include/asm/elf.h
arch/sparc/include/asm/elf_32.h
arch/xtensa/include/asm/elf.h