diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2014-04-19 16:10:09 (GMT) |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2014-04-30 17:10:35 (GMT) |
| commit | b24dc8dace74708fd849312722090169c5da97d3 (patch) | |
| tree | c668e6b97cd9647b6f8584ee4ccab97417dd93f6 /arch/x86/kernel/uprobes.c | |
| parent | 8dbacad93a2a12adebcc717e6055b1bcc1739ab8 (diff) | |
| download | linux-b24dc8dace74708fd849312722090169c5da97d3.tar.xz | |
uprobes/x86: Fix is_64bit_mm() with CONFIG_X86_X32
is_64bit_mm() assumes that mm->context.ia32_compat means the 32-bit
instruction set, this is not true if the task is TIF_X32.
Change set_personality_ia32() to initialize mm->context.ia32_compat
by TIF_X32 or TIF_IA32 instead of 1. This allows to fix is_64bit_mm()
without affecting other users, they all treat ia32_compat as "bool".
TIF_ in ->ia32_compat looks a bit strange, but this is grep-friendly
and avoids the new define's.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Jim Keniston <jkenisto@us.ibm.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Diffstat (limited to 'arch/x86/kernel/uprobes.c')
| -rw-r--r-- | arch/x86/kernel/uprobes.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c index 892975b..ecbffd1 100644 --- a/arch/x86/kernel/uprobes.c +++ b/arch/x86/kernel/uprobes.c @@ -245,7 +245,7 @@ static int uprobe_init_insn(struct arch_uprobe *auprobe, struct insn *insn, bool static inline bool is_64bit_mm(struct mm_struct *mm) { return !config_enabled(CONFIG_IA32_EMULATION) || - !mm->context.ia32_compat; + !(mm->context.ia32_compat == TIF_IA32); } /* * If arch_uprobe->insn doesn't use rip-relative addressing, return |