Ard Biesheuvel 2a098504d7 ARM: 9214/1: alignment: advance IT state after emulating Thumb instruction ...

commit e5c46fde75 upstream.

After emulating a misaligned load or store issued in Thumb mode, we have
to advance the IT state by hand, or it will get out of sync with the
actual instruction stream, which means we'll end up applying the wrong
condition code to subsequent instructions. This might corrupt the
program state rather catastrophically.

So borrow the it_advance() helper from the probing code, and use it on
CPSR if the emulated instruction is Thumb.

Cc: <stable@vger.kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-07-21 21:24:12 +02:00

..

asm

ARM: 9214/1: alignment: advance IT state after emulating Thumb instruction

2022-07-21 21:24:12 +02:00

debug

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uapi/asm

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