Commit 0bd1ed48 authored Feb 10, 2018 by Ming Lei Committed by Jens Axboe Feb 23, 2018

block: pass inclusive 'lend' parameter to truncate_inode_pages_range

The 'lend' parameter of truncate_inode_pages_range is required to be
inclusive, so follow the rule.

This patch fixes one memory corruption triggered by discard.

Cc: <stable@vger.kernel.org>
Cc: Dmitry Monakhov <dmonakhov@openvz.org>
Fixes: 351499a1 ("block: Invalidate cache on discard v2")
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 0f9da844

block/ioctl.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -225,7 +225,7 @@ static int blk_ioctl_discard(struct block_device *bdev, fmode_t mode,

		if (start + len > i_size_read(bdev->bd_inode))
		return -EINVAL;
		truncate_inode_pages_range(mapping, start, start + len);
		truncate_inode_pages_range(mapping, start, start + len - 1);
		return blkdev_issue_discard(bdev, start >> 9, len >> 9,
		GFP_KERNEL, flags);
		}

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