swap: fix swapfile read/write offset
commit caf6912f upstream. We're not factoring in the start of the file for where to write and read the swapfile, which leads to very unfortunate side effects of writing where we should not be... [This issue only affects swapfiles on filesystems on top of blockdevs that implement rw_page ops (brd, zram, btt, pmem), and not on top of any other block devices, in contrast to the upstream commit fix.] Fixes: dd6bd0d9 ("swap: use bdev_read_page() / bdev_write_page()") Signed-off-by:Jens Axboe <axboe@kernel.dk> Signed-off-by:
Anthony Iliopoulos <ailiop@suse.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
638c9546
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