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cross-arch: don't corrupt personality flags upon exec()

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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 f9783ec862 ("[S390] Do not clobber personality flags on
exec") and 59e4c3a2fe ("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>
This commit is contained in:
Jiri Kosina 2012-10-04 17:12:20 -07:00 committed by Linus Torvalds
parent 0d118d7f49
commit 16f3e95b32
16 changed files with 31 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
arch/avr32/include/asm/elf.h
View file

@ -102,6 +102,7 @@ typedef struct user_fpu_struct elf_fpregset_t;
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) set_personality(PER_LINUX_32BIT)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
#endif /* __ASM_AVR32_ELF_H */

3
arch/blackfin/include/asm/elf.h
View file

@ -132,6 +132,7 @@ 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)))
#endif

3
arch/c6x/include/asm/elf.h
View file

@ -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

3
arch/cris/include/asm/elf.h
View file

@ -86,6 +86,7 @@ typedef unsigned long elf_fpregset_t;
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif

3
arch/frv/include/asm/elf.h
View file

@ -137,6 +137,7 @@ 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)))
#endif

3
arch/h8300/include/asm/elf.h
View file

@ -54,7 +54,8 @@ typedef unsigned long elf_fpregset_t;
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#define R_H8_NONE 0
#define R_H8_DIR32 1

3
arch/hexagon/include/asm/elf.h
View file

@ -217,7 +217,8 @@ do { \
#define ELF_PLATFORM (NULL)
#ifdef __KERNEL__
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1

3
arch/m32r/include/asm/elf.h
View file

@ -128,6 +128,7 @@ typedef elf_fpreg_t elf_fpregset_t;
intent than poking at uname or /proc/cpuinfo. */
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif /* _ASM_M32R__ELF_H */

3
arch/m68k/include/asm/elf.h
View file

@ -113,6 +113,7 @@ typedef struct user_m68kfp_struct elf_fpregset_t;
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif

3
arch/microblaze/include/asm/elf.h
View file

@ -116,7 +116,8 @@ do { \
} while (0)
#ifdef __KERNEL__
#define SET_PERSONALITY(ex) set_personality(PER_LINUX_32BIT)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
#endif
#endif /* __uClinux__ */

3
arch/mn10300/include/asm/elf.h
View file

@ -151,7 +151,8 @@ do { \
#define ELF_PLATFORM (NULL)
#ifdef __KERNEL__
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif
#endif /* _ASM_ELF_H */

3
arch/openrisc/include/asm/elf.h
View file

@ -110,7 +110,8 @@ extern void dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt);
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif /* __KERNEL__ */
#endif

2
arch/score/include/asm/elf.h
View file

@ -54,7 +54,7 @@ typedef elf_fpreg_t elf_fpregset_t;
#define SET_PERSONALITY(ex) \
do { \
set_personality(PER_LINUX); \
set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \
} while (0)
struct task_struct;

3
arch/sh/include/asm/elf.h
View file

@ -183,7 +183,8 @@ do { \
} while (0)
#endif
#define SET_PERSONALITY(ex) set_personality(PER_LINUX_32BIT)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
#ifdef CONFIG_VSYSCALL
/* vDSO has arch_setup_additional_pages */

3
arch/sparc/include/asm/elf_32.h
View file

@ -128,6 +128,7 @@ typedef struct {
#define ELF_PLATFORM (NULL)
#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif /* !(__ASMSPARC_ELF_H) */

3
arch/xtensa/include/asm/elf.h
View file

@ -189,7 +189,8 @@ typedef struct {
#endif
} elf_xtregs_t;
#define SET_PERSONALITY(ex) set_personality(PER_LINUX_32BIT)
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
struct task_struct;