Alexander Potapenko f1fd16cd97 btrfs: zlib: zero-initialize zlib workspace
commit eadd7deca0ad8a83edb2b894d8326c78e78635d6 upstream.

KMSAN reports uses of uninitialized memory in zlib's longest_match()
called on memory originating from zlib_alloc_workspace().
This issue is known by zlib maintainers and is claimed to be harmless,
but to be on the safe side we'd better initialize the memory.

Link: https://zlib.net/zlib_faq.html#faq36
Reported-by: syzbot+14d9e7602ebdf7ec0a60@syzkaller.appspotmail.com
CC: stable@vger.kernel.org # 5.4+
Signed-off-by: Alexander Potapenko <glider@google.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-02-15 17:22:22 +01:00
..
2020-10-16 11:11:22 -07:00
2021-09-18 13:40:15 +02:00
2022-11-25 17:45:56 +01:00
2022-06-09 10:21:16 +02:00
2023-01-04 11:39:23 +01:00
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