| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.15 031/122] block: pass inclusive lend parameter to truncate_inode_pages_range | Date | Wed, 7 Mar 2018 11:37:23 -0800 |
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4.15-stable review patch. If anyone has any objections, please let me know.
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From: Ming Lei <ming.lei@redhat.com>
commit 0bd1ed4860d0f5f836aa8371797689a3779d1bf5 upstream.
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: 351499a172c0 ("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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- block/ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/block/ioctl.c +++ b/block/ioctl.c @@ -225,7 +225,7 @@ static int blk_ioctl_discard(struct bloc 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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