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authorJérôme Glisse <jglisse@redhat.com>2019-04-26 07:23:41 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2019-04-26 18:18:05 +0200
commite153abc0739ff77bd89c9ba1688cdb963464af97 (patch)
tree87f8fcbdd0fda1970e0dffd7b1a10edfee6df158 /ipc
parentmm/memory_hotplug.c: drop memory device reference after find_memory_block() (diff)
downloadlinux-e153abc0739ff77bd89c9ba1688cdb963464af97.tar.xz
linux-e153abc0739ff77bd89c9ba1688cdb963464af97.zip
zram: pass down the bvec we need to read into in the work struct
When scheduling work item to read page we need to pass down the proper bvec struct which points to the page to read into. Before this patch it uses a randomly initialized bvec (only if PAGE_SIZE != 4096) which is wrong. Note that without this patch on arch/kernel where PAGE_SIZE != 4096 userspace could read random memory through a zram block device (thought userspace probably would have no control on the address being read). Link: http://lkml.kernel.org/r/20190408183219.26377-1-jglisse@redhat.com Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
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