On Sun, Aug 02, 2020 at 10:12:47AM -0700, trix@xxxxxxxxxx wrote: > From: Tom Rix <trix@xxxxxxxxxx> > > Clang static analysis reports this error > > crypto/drbg.c:441:40: warning: Division by zero > padlen = (inputlen + sizeof(L_N) + 1) % (drbg_blocklen(drbg)); > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ > > When drbg_bocklen fails it returns 0. > > if (drbg && drbg->core) > return drbg->core->blocklen_bytes; > return 0; Yes but it can only fail if the drbg is not instantiated. If you're hitting the generate path with an uninstantiated drbg you've got bigger problems than a divide by zero. So how is this even possible? Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
