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Commit dd4c1b7d authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Mike Snitzer
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dm stats: fix divide by zero if 'number_of_areas' arg is zero 



If the number_of_areas argument was zero the kernel would crash on
div-by-zero.  Add better input validation.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # v3.12+
parent bccab6a0
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