linux-kernel - [PATCH 1/2] lib/mpi: mpi_read_raw_data(): purge redundant clearing of nbits

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1464260732-4446-1-git-send-email-nicstange@gmail.com>
Date:	Thu, 26 May 2016 13:05:31 +0200
From:	Nicolai Stange <nicstange@...il.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Tadeusz Struk <tadeusz.struk@...el.com>,
	Michal Marek <mmarek@...e.com>, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org, Nicolai Stange <nicstange@...il.com>
Subject: [PATCH 1/2] lib/mpi: mpi_read_raw_data(): purge redundant clearing of nbits

In mpi_read_raw_data(), unsigned nbits is calculated as follows:

 nbits = nbytes * 8;

and redundantly cleared later on if nbytes == 0:

  if (nbytes > 0)
    ...
  else
    nbits = 0;

Purge this redundant clearing for the sake of clarity.

Signed-off-by: Nicolai Stange <nicstange@...il.com>
---
 Applicable to linux-next-20160525.

 lib/mpi/mpicoder.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/lib/mpi/mpicoder.c b/lib/mpi/mpicoder.c
index 747606f..c160393 100644
--- a/lib/mpi/mpicoder.c
+++ b/lib/mpi/mpicoder.c
@@ -51,8 +51,6 @@ MPI mpi_read_raw_data(const void *xbuffer, size_t nbytes)
 	}
 	if (nbytes > 0)
 		nbits -= count_leading_zeros(buffer[0]);
-	else
-		nbits = 0;
 
 	nlimbs = DIV_ROUND_UP(nbytes, BYTES_PER_MPI_LIMB);
 	val = mpi_alloc(nlimbs);
-- 
2.8.2