I noticed that this patch is forgotten at ext4.git#loop-fix and therefore is not available at linux-next.git . Please be sure to include for 4.18 . On 2018/05/08 0:37, Theodore Ts'o wrote: > Refactor the validation code used in LOOP_SET_FD so it is also used in > LOOP_CHANGE_FD. Otherwise it is possible to construct a set of loop > devices that all refer to each other. This can lead to a infinite > loop in starting with "while (is_loop_device(f)) .." in loop_set_fd(). > > Fix this by refactoring out the validation code and using it for > LOOP_CHANGE_FD as well as LOOP_SET_FD. > > Reported-by: syzbot+4349872271ece473a7c91190b68b4bac7c5dbc87@xxxxxxxxxxxxxxxxxxxxxxxxx > Reported-by: syzbot+40bd32c4d9a3cc12a339@xxxxxxxxxxxxxxxxxxxxxxxxx > Reported-by: syzbot+769c54e66f994b041be7@xxxxxxxxxxxxxxxxxxxxxxxxx > Reported-by: syzbot+0a89a9ce473936c57065@xxxxxxxxxxxxxxxxxxxxxxxxx > Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> > --- > drivers/block/loop.c | 68 +++++++++++++++++++++++++++++----------------------- > 1 file changed, 38 insertions(+), 30 deletions(-) >
