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authorDmitry Kasatkin <dmitry.kasatkin@intel.com>2012-01-26 19:13:22 +0200
committerJames Morris <jmorris@namei.org>2012-02-02 00:23:14 +1100
commite2fe85c236736c866481de288f636ab06ef49787 (patch)
tree11861382d9e84ec859a41132afe309f94f7cc20e /lib/mpi
parente87c5e35a92e045de75fb6ae9846a38bdd0f92bd (diff)
downloadlinux-linaro-stable-e2fe85c236736c866481de288f636ab06ef49787.tar.gz
lib/mpi: checks for zero divisor length
Divisor length should not be 0. Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com> Reviewed-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'lib/mpi')
-rw-r--r--lib/mpi/mpi-div.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/mpi/mpi-div.c b/lib/mpi/mpi-div.c
index c3087d1390ce..8a45717bd001 100644
--- a/lib/mpi/mpi-div.c
+++ b/lib/mpi/mpi-div.c
@@ -149,6 +149,9 @@ int mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den)
mpi_ptr_t marker[5];
int markidx = 0;
+ if (!dsize)
+ return -EINVAL;
+
memset(marker, 0, sizeof(marker));
/* Ensure space is enough for quotient and remainder.