diff options
| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2011-04-13 04:59:36 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-04-14 09:15:24 +0100 |
| commit | 5e143436d04465c937c1a242808a99c46393af3e (patch) | |
| tree | 882b80a1a208776f32180bf735a9cecf013a5637 /arch/arm | |
| parent | df5419a9a90ac4ea2d853d68cc788e32cfe71278 (diff) | |
| download | lwn-5e143436d04465c937c1a242808a99c46393af3e.tar.gz lwn-5e143436d04465c937c1a242808a99c46393af3e.zip | |
ARM: 6878/1: fix personality flag propagation across an exec
Our SET_PERSONALITY() implementation was overwriting all existing
personality flags, including ADDR_NO_RANDOMIZE, making them unavailable
to processes being exec'd after a call to personality() in user space.
This prevents the gdb test suite from running successfully.
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/elf.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/arm/kernel/elf.c b/arch/arm/kernel/elf.c index d4a0da1e48f4..9b05c6a0dcea 100644 --- a/arch/arm/kernel/elf.c +++ b/arch/arm/kernel/elf.c @@ -40,15 +40,22 @@ EXPORT_SYMBOL(elf_check_arch); void elf_set_personality(const struct elf32_hdr *x) { unsigned int eflags = x->e_flags; - unsigned int personality = PER_LINUX_32BIT; + unsigned int personality = current->personality & ~PER_MASK; + + /* + * We only support Linux ELF executables, so always set the + * personality to LINUX. + */ + personality |= PER_LINUX; /* * APCS-26 is only valid for OABI executables */ - if ((eflags & EF_ARM_EABI_MASK) == EF_ARM_EABI_UNKNOWN) { - if (eflags & EF_ARM_APCS_26) - personality = PER_LINUX; - } + if ((eflags & EF_ARM_EABI_MASK) == EF_ARM_EABI_UNKNOWN && + (eflags & EF_ARM_APCS_26)) + personality &= ~ADDR_LIMIT_32BIT; + else + personality |= ADDR_LIMIT_32BIT; set_personality(personality); |