Jason A. Donenfeld Jason@zx2c4.com wrote:
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
lib/crypto/chacha20poly1305.c | 3 +++ 1 file changed, 3 insertions(+)
Patch applied. Thanks.