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| author | Jiri Kosina <jkosina@suse.cz> | 2012-10-04 17:12:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-06 03:04:47 +0900 |
| commit | 16f3e95b3209c4d9080e3a3c6bb9955a0e7cfa95 (patch) | |
| tree | 3ea326a41bd3709d4cb23bdf89ea4084e41dc6f5 /arch/c6x | |
| parent | 0d118d7f49c8aa0b74be83bc2ad134b71106cab4 (diff) | |
| download | op-kernel-dev-16f3e95b3209c4d9080e3a3c6bb9955a0e7cfa95.zip op-kernel-dev-16f3e95b3209c4d9080e3a3c6bb9955a0e7cfa95.tar.gz | |
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>
Diffstat (limited to 'arch/c6x')
| -rw-r--r-- | arch/c6x/include/asm/elf.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/c6x/include/asm/elf.h b/arch/c6x/include/asm/elf.h index f4552db..32b9971 100644 --- a/arch/c6x/include/asm/elf.h +++ b/arch/c6x/include/asm/elf.h @@ -77,7 +77,8 @@ do { \ #define ELF_PLATFORM (NULL) -#define SET_PERSONALITY(ex) set_personality(PER_LINUX) +#define SET_PERSONALITY(ex) \ + set_personality(PER_LINUX | (current->personality & (~PER_MASK))) /* C6X specific section types */ #define SHT_C6000_UNWIND 0x70000001 |
