On Thu, May 10, 2018 at 05:38:51PM +0200, Jan Kara wrote: > When ext4_ind_map_blocks() computes a length of a hole, it doesn't count > with the fact that mapped offset may be somewhere in the middle of the > completely empty subtree. In such case it will return too large length > of the hole which then results in lseek(SEEK_DATA) to end up returning > an incorrect offset beyond the end of the hole. > > Fix the problem by correctly taking offset within a subtree into account > when computing a length of a hole. > > Fixes: facab4d9711e7aa3532cb82643803e8f1b9518e8 > CC: stable@xxxxxxxxxxxxxxx > Reported-by: Jeff Mahoney <jeffm@xxxxxxxx> > Signed-off-by: Jan Kara <jack@xxxxxxx> Applied, thanks. - Ted
