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authorGuillermo Julián Moreno <guillermo.julian@naudit.es>2016-06-03 14:55:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-06-03 15:06:22 -0700
commit65ee03c4b9f89e1b088defd97273be6da169d798 (patch)
treeca5bd05b3bc29cf2a5a07f083fd80221049aa06e /Documentation
parent4340fa55298d17049e71c7a34e04647379c269f3 (diff)
mm: fix overflow in vm_map_ram()
When remapping pages accounting for 4G or more memory space, the operation 'count << PAGE_SHIFT' overflows as it is performed on an integer. Solution: cast before doing the bitshift. [akpm@linux-foundation.org: fix vm_unmap_ram() also] [akpm@linux-foundation.org: fix vmap() as well, per Guillermo] Link: http://lkml.kernel.org/r/etPan.57175fb3.7a271c6b.2bd@naudit.es Signed-off-by: Guillermo Julián Moreno <guillermo.julian@naudit.es> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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