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| author | Dmitry Kasatkin <[email protected]> | 2012-01-26 17:13:19 +0000 |
|---|---|---|
| committer | James Morris <[email protected]> | 2012-02-01 13:23:39 +0000 |
| commit | 4877e056192245b387aae004ab38f7f3899dd57c (patch) | |
| tree | af540cd2de9df321421651016fed50e4a56b224c /lib/mpi/mpiutil.c | |
| parent | lib/digsig: pkcs_1_v1_5_decode_emsa cleanup (diff) | |
| download | kernel-4877e056192245b387aae004ab38f7f3899dd57c.tar.gz kernel-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 <[email protected]>
Reviewed-by: Tetsuo Handa <[email protected]>
Signed-off-by: James Morris <[email protected]>
Diffstat (limited to 'lib/mpi/mpiutil.c')
| -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); } |