[PATCH] riscv: signal: fix sigaltstack frame size checking

[patchwork-bot+linux-riscv at kernel.org]

Hello:

This patch was applied to riscv/linux.git (for-next)
by Palmer Dabbelt <palmer at rivosinc.com>:

On Tue, 22 Aug 2023 16:49:03 +0000 you wrote:
> The alternative stack checking in get_sigframe introduced by the Vector
> support is not needed and has a problem. It is not needed as we have
> already validate it at the beginning of the function if we are already
> on an altstack. If not, the size of an altstack is always validated at
> its allocation stage with sigaltstack_size_valid().
> 
> Besides, we must only regard the size of an altstack if the handler of a
> signal is registered with SA_ONSTACK. So, blindly checking overflow of
> an altstack if sas_ss_size not equals to zero will check against wrong
> signal handlers if only a subset of signals are registered with
> SA_ONSTACK.
> 
> [...]

Here is the summary with links:
  - riscv: signal: fix sigaltstack frame size checking
    https://git.kernel.org/riscv/c/0caa0b447398

You are awesome, thank you!
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