[PATCH] arm64: Preventing READ_IMPLIES_EXEC propagation
dongbo (E)
dongbo4 at huawei.com
Tue Apr 25 02:11:29 EDT 2017
From: Dong Bo <dongbo4 at 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 <dongbo4 at 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 */
--
1.9.1
.
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