Re: [syzbot] [mm?] possible deadlock in upgrade_mmap_lock_carefully

[syzbot]

> On Wed, Oct 2, 2024 at 8:14 AM Shu Han <ebpqwerty472123@xxxxxxxxx> wrote:
>>
>> It seems to be the same as [1].
>> New LSM hook position for remap_file_pages + IMA = deadlock.
>> The new LSM hook position is added for a bypass caused by
>> no check in remap_file_pages + READ_IMPLIES_EXEC in do_mmap.
>
> Thanks Shu Han, let's mark this as a dup and sort out a fix in the first report.
>
> #syz dup: [syzbot] [integrity?] [lsm?] possible deadlock in

can't find the dup bug

> process_measurement (4)
>
>> I suggest fix it by removing the check and moving READ_IMPLIES_EXEC
>> out of do_mmap[2].
>>
>> Link: https://lore.kernel.org/lkml/20240928065620.7abadb2d8552f03d785c77c9@xxxxxxxxxxxxxxxxxxxx/
>> [1]
>> Link: https://lore.kernel.org/all/20240928180044.50-1-ebpqwerty472123@xxxxxxxxx/
>> [2]
>
> -- 
> paul-moore.com