Jan Kara 80747f06d9 ext4: fix overflows in SEEK_HOLE, SEEK_DATA implementations ...

commit e7293fd146 upstream.

ext4_lblk_t is just u32 so multiplying it by blocksize can easily
overflow for files larger than 4 GB. Fix that by properly typing the
block offsets before shifting.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-07-21 18:21:32 -07:00

16 KiB

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