Re: [BUG][PATCH] crypto: arm64: Avoid indirect branch to bti_c
From: Mark Brown <broonie@kernel.org>
Date: 2020-10-06 10:36:14
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linux-arm-kernel, lkml
On Mon, Oct 05, 2020 at 10:48:54PM -0500, Jeremy Linton wrote:
The AES code uses a 'br x7' as part of a function called by a macro. That branch needs a bti_j as a target. This results in a panic as seen below. Instead of trying to replace the branch target with a bti_jc, lets replace the indirect branch with a bl/ret, bl sequence that can target the existing bti_c.
Reviewed-by: Mark Brown <broonie@kernel.org>
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