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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-10-04 19:04:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-18 19:20:30 +0100 |
| commit | 33e53f2cac19cc6b2f2eaebc27ff70c813a04998 (patch) | |
| tree | d6798ca0cdbcbb8506579de25f35c34e3401bf2f /security | |
| parent | 9de4ffb701505624b9da5e03d3662f9dee6d28b7 (diff) | |
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>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions