Messages in this thread | | | Date | Wed, 17 Apr 2019 16:41:42 +0200 | From | Michal Koutný <> | Subject | Re: [PATCH] mm: get_cmdline use arg_lock instead of mmap_sem |
| |
On Wed, Apr 17, 2019 at 03:41:52PM +0200, Michal Hocko <mhocko@kernel.org> wrote: > Don't we need to use the lock in prctl_set_mm as well then?
Correct. The patch alone just moves the race from get_cmdline/prctl_set_mm_map to get_cmdline/prctl_set_mm.
arg_lock could be used in prctl_set_mm but the better idea (IMO) is complete removal of that code in favor of prctl_set_mm_map [1].
Michal
[1] https://lore.kernel.org/lkml/20180405182651.GM15783@uranus.lan/
| |