On Thu, Mar 12, 2020 at 01:25:50PM -0700, Eric Biggers wrote: > From: Eric Biggers <ebiggers@xxxxxxxxxx> > > After request_module(), nothing is stopping the module from being > unloaded until someone takes a reference to it via try_get_module(). > > The WARN_ONCE() in get_fs_type() is thus user-reachable, via userspace > running 'rmmod' concurrently. > > Since WARN_ONCE() is for kernel bugs only, not for user-reachable > situations, downgrade this warning to pr_warn_once(). > > Cc: stable@xxxxxxxxxxxxxxx > Cc: Alexei Starovoitov <ast@xxxxxxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > Cc: Jeff Vander Stoep <jeffv@xxxxxxxxxx> > Cc: Jessica Yu <jeyu@xxxxxxxxxx> > Cc: Kees Cook <keescook@xxxxxxxxxxxx> > Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx> > Cc: NeilBrown <neilb@xxxxxxxx> > Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> Acked-by: Luis Chamberlain <mcgrof@xxxxxxxxxx> Luis
