Matthew Wilcox (Oracle) 33e53f2cac btrfs: fix potential overflow in cluster_pages_for_defrag on 32bit arch
commit a1fbc6750e212c5675a4e48d7f51d44607eb8756 upstream.

On 32-bit systems, this shift will overflow for files larger than 4GB as
start_index is unsigned long while the calls to btrfs_delalloc_*_space
expect u64.

CC: stable@vger.kernel.org # 4.4+
Fixes: df480633b891 ("btrfs: extent-tree: Switch to new delalloc space reserve and release")
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Sterba <dsterba@suse.com>
[ define the variable instead of repeating the shift ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-18 19:20:30 +01:00
..
2020-11-05 11:43:34 +01:00
2020-11-05 11:43:21 +01:00
2019-09-19 09:42:37 -07:00
2020-10-29 09:58:03 +01:00
2019-09-19 09:42:37 -07:00
2020-08-26 10:40:56 +02:00
2019-09-19 09:42:37 -07:00
2019-07-03 17:52:09 -04:00
2020-11-18 19:20:30 +01:00
2020-11-05 11:43:29 +01:00
2020-06-17 16:40:24 +02:00
2020-03-05 16:43:36 +01:00
2020-10-01 13:17:19 +02:00
2019-08-07 21:51:47 -04:00
2020-03-25 08:25:58 +01:00
2019-12-17 19:55:30 +01:00
2019-09-18 16:59:14 -07:00
2019-09-18 16:59:14 -07:00
2020-05-06 08:15:15 +02:00
2019-08-01 20:51:23 +02:00