[PATCH] arm64: armv8_deprecated: Fix undef_hook mask for thumb setend

[Fredrik Strupe]

Use a full 32-bit mask to prevent accidental matchings of thumb32
instructions where the second half-word is equal to the thumb16 setend
encoding.

This fixes the same problem as the following patch:

    https://lkml.org/lkml/2020/3/16/341

but for setend emulation instead.

Signed-off-by: Fredrik Strupe <fredrik@xxxxxxxxxx>
---
 arch/arm64/kernel/armv8_deprecated.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c
index 9d3442d62..8c06dfee0 100644
--- a/arch/arm64/kernel/armv8_deprecated.c
+++ b/arch/arm64/kernel/armv8_deprecated.c
@@ -609,7 +609,7 @@ static struct undef_hook setend_hooks[] = {
 	},
 	{
 		/* Thumb mode */
-		.instr_mask	= 0x0000fff7,
+		.instr_mask	= 0xfffffff7,
 		.instr_val	= 0x0000b650,
 		.pstate_mask	= (PSR_AA32_T_BIT | PSR_AA32_MODE_MASK),
 		.pstate_val	= (PSR_AA32_T_BIT | PSR_AA32_MODE_USR),
--
2.20.1