On Tue, Apr 25, 2017 at 02:11:29PM +0800, dongbo (E) wrote: > From: Dong Bo <dong...@huawei.com> > > Once the READ_IMPLIES_EXEC flag is set on arm64, the flag is > propagated to its child processes, even the ELF files are > marked as not requiring executable stack. > > Signed-off-by: Dong Bo <dong...@huawei.com> > --- > arch/arm64/include/asm/elf.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h > index 5d17004..5941e7f 100644 > --- a/arch/arm64/include/asm/elf.h > +++ b/arch/arm64/include/asm/elf.h > @@ -142,6 +142,7 @@ > ({ \ > clear_bit(TIF_32BIT, ¤t->mm->context.flags); \ > clear_thread_flag(TIF_32BIT); \ > + current->personality &= ~READ_IMPLIES_EXEC; \ > }) > /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes > */
This looks good to me: Acked-by: Will Deacon <will.dea...@arm.com> We might also want a comment in the compat code to say that we inherit the flag to follow the arch/arm/ behaviour. Anyway, I'd like to see this sit in -next for a bit, so would rather hold this off until 4.12. Will