Re: Bug #220387 - 6.16.0 CFI panic at boot in crypto/zstd.c

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On Sat, Aug 16, 2025 at 12:44:18PM +0100, Fabio Scaccabarozzi wrote:
> 
> I reported the bug in subject on the kernel bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=220387
> 
> Kernel 6.16.0 crashes with a CFI panic at boot in crypto/zstd.c (am compiling with Clang+thinLTO).
> I bisected, did some digging and managed to produce a working patch (I'm not sure of the correctness of it).
> Can you please take a look at the bug and apply/rework the patch as you see fit?
> 
> I guess this could be added to stable in 6.16.2 then (patch still applies cleanly on 6.16.1).

This bug is already fixed by

commit 962ddc5a7a4b04c007bba0f3e7298cda13c62efd
Author: Eric Biggers <ebiggers@xxxxxxxxxx>
Date:   Tue Jul 8 17:59:54 2025 -0700

    crypto: acomp - Fix CFI failure due to type punning

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt




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