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lib/mpi: check for possible zero length

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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]>
This commit is contained in:
Dmitry Kasatkin 2012-01-26 19:13:19 +02:00 • committed by James Morris
commit 4877e05619
1 changed files with 3 additions and 0 deletions
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3
lib/mpi/mpiutil.c
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@ -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);
}