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Date: Sat, 6 Dec 2014 01:00:41 +0100 From: Rasmus Villemoes <linux@...musvillemoes.dk> To: David Howells <dhowells@...hat.com>, Rusty Russell <rusty@...tcorp.com.au> Cc: Rasmus Villemoes <linux@...musvillemoes.dk>, linux-kernel@...r.kernel.org Subject: [PATCH 1/2] MPILIB: Fix comparison of negative MPIs If u and v both represent negative integers and their limb counts happen to differ, mpi_cmp will always return a positive value - this is obviously bogus. u is smaller than v if and only if it is larger in absolute value. Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk> --- lib/mpi/mpi-cmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/mpi/mpi-cmp.c b/lib/mpi/mpi-cmp.c index 1871e7b61ca0..3801694240d8 100644 --- a/lib/mpi/mpi-cmp.c +++ b/lib/mpi/mpi-cmp.c @@ -57,7 +57,7 @@ int mpi_cmp(MPI u, MPI v) if (usize != vsize && !u->sign && !v->sign) return usize - vsize; if (usize != vsize && u->sign && v->sign) - return vsize + usize; + return vsize - usize; if (!usize) return 0; cmp = mpihelp_cmp(u->d, v->d, usize); -- 2.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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