zram: set physical queue limits to avoid array out of bounds accesses

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zram can handle at most SECTORS_PER_PAGE sectors in a bio's bvec. When using
the NVMe over Fabrics loopback target which potentially sends a huge bulk of
pages attached to the bio's bvec this results in a kernel panic because of
array out of bounds accesses in zram_decompress_page().

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Johannes Thumshirn 2017-03-06 11:23:35 +01:00 • committed by Jens Axboe

parent 01388df376

commit 0bc315381f

1 changed files with 2 additions and 0 deletions

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drivers/block/zram/zram_drv.c

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