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authorJason A. Donenfeld <Jason@zx2c4.com>2020-02-06 12:42:01 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2020-02-14 14:48:37 +0800
commitc9cc0517bba9f0213f1e55172feceb99e5512daf (patch)
treeb6c2154760a9ccc9e2ebba416625203ad66aa542 /arch
parent872d92dec353a8d30fa186892cd5ea3e17ca75d3 (diff)
downloadlinux-c9cc0517bba9f0213f1e55172feceb99e5512daf.tar.bz2
crypto: chacha20poly1305 - prevent integer overflow on large input
This code assigns src_len (size_t) to sl (int), which causes problems when src_len is very large. Probably nobody in the kernel should be passing this much data to chacha20poly1305 all in one go anyway, so I don't think we need to change the algorithm or introduce larger types or anything. But we should at least error out early in this case and print a warning so that we get reports if this does happen and can look into why anybody is possibly passing it that much data or if they're accidently passing -1 or similar. Fixes: d95312a3ccc0 ("crypto: lib/chacha20poly1305 - reimplement crypt_from_sg() routine") Cc: Ard Biesheuvel <ardb@kernel.org> Cc: stable@vger.kernel.org # 5.5+ Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch')
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