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authorMing Lei <ming.lei@redhat.com>2018-02-10 08:46:17 +0800
committerJens Axboe <axboe@kernel.dk>2018-02-23 15:20:19 -0700
commit0bd1ed4860d0f5f836aa8371797689a3779d1bf5 (patch)
tree061d2a86451b27d9aff40d96cbb2effcbfb6b6c2
parent0f9da844d87796ac31b04e81ee95e155e9043132 (diff)
downloadlinux-0bd1ed4860d0f5f836aa8371797689a3779d1bf5.tar.bz2
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: 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>
-rw-r--r--block/ioctl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/ioctl.c b/block/ioctl.c
index 1668506d8ed8..3884d810efd2 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -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);
}