diff options
| author | Dmitry Kasatkin <dmitry.kasatkin@intel.com> | 2012-01-26 19:13:19 +0200 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2012-02-02 00:23:39 +1100 |
| commit | 4877e056192245b387aae004ab38f7f3899dd57c (patch) | |
| tree | af540cd2de9df321421651016fed50e4a56b224c /lib | |
| parent | b35e286a640f31d619a637332972498b51f3fd90 (diff) | |
| download | lwn-4877e056192245b387aae004ab38f7f3899dd57c.tar.gz lwn-4877e056192245b387aae004ab38f7f3899dd57c.zip | |
lib/mpi: check for possible zero length
Buggy client might pass zero nlimbs which is meaningless.
Added check for zero length.
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')
| -rw-r--r-- | lib/mpi/mpiutil.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/mpi/mpiutil.c b/lib/mpi/mpiutil.c index 6bfc41f62b8f..26e4ed31e256 100644 --- a/lib/mpi/mpiutil.c +++ b/lib/mpi/mpiutil.c @@ -58,6 +58,9 @@ mpi_ptr_t mpi_alloc_limb_space(unsigned nlimbs) { size_t len = nlimbs * sizeof(mpi_limb_t); + if (!len) + return NULL; + return kmalloc(len, GFP_KERNEL); } |