On Wed, Oct 2, 2024 at 9:32 PM syzbot <syzbot+a6456f6334aa19425886@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > 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) Stupid line wrapping, let's try again ... #syz dup: possible deadlock in 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
