Re: [PATCH v2] ext4: Fix function prototype mismatch for ext4_feat_ktype

On Wed, 4 Jan 2023 13:09:12 -0800, Kees Cook wrote:

With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed.

ext4_feat_ktype was setting the "release" handler to "kfree", which doesn't have a matching function prototype. Add a simple wrapper with the correct prototype.

[...]

Applied, thanks!

[1/1] ext4: Fix function prototype mismatch for ext4_feat_ktype commit: d99a55a94a0db8eda4a336a6f21730b844b8d2d2

Best regards,