Re: [PATCH 1/2] module: pull out add_taint_module() to be public

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Aug 26, 2026 at 07:13:36AM -0400, Aaron Tomlin wrote:
> On Wed, Aug 26, 2026 at 11:19:32AM +0200, Greg Kroah-Hartman wrote:
> > Other kernel code might want to call add_taint_module() so pull it out
> > and make it global.  If modules are not enabled, this defaults to a call
> > to add_taint(), so all is fine.
> > 
> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > ---
> >  include/linux/module.h |  8 ++++++++
> >  kernel/module/main.c   | 13 +++++++++++--
> >  2 files changed, 19 insertions(+), 2 deletions(-)
> > 
> > diff --git a/include/linux/module.h b/include/linux/module.h
> > index 96cc98568eea..25221539e645 100644
> > --- a/include/linux/module.h
> > +++ b/include/linux/module.h
> > @@ -29,6 +29,7 @@
> >  #include <linux/srcu.h>
> >  #include <linux/static_call_types.h>
> >  #include <linux/dynamic_debug.h>
> > +#include <linux/panic.h>
> >  
> >  #include <linux/percpu.h>
> >  #include <asm/module.h>
> > @@ -770,6 +771,8 @@ static inline bool is_livepatch_module(struct module *mod)
> >  
> >  void module_for_each_mod(int(*func)(struct module *mod, void *data), void *data);
> >  
> > +void add_taint_module(struct module *mod, unsigned flag, enum lockdep_ok);
> > +
> >  #else /* !CONFIG_MODULES... */
> >  
> >  static inline struct module *__module_address(unsigned long addr)
> > @@ -877,6 +880,11 @@ static inline bool module_is_coming(struct module *mod)
> >  static inline void module_for_each_mod(int(*func)(struct module *mod, void *data), void *data)
> >  {
> >  }
> > +
> > +static inline void add_taint_module(struct module *mod, unsigned flag, enum lockdep_ok)
> > +{
> > +	add_taint(flag, lockdep_ok);
> > +}
> >  #endif /* CONFIG_MODULES */
> >  
> >  #ifdef CONFIG_SYSFS
> > diff --git a/kernel/module/main.c b/kernel/module/main.c
> > index d0e1e0bd2ad0..99cedb961898 100644
> > --- a/kernel/module/main.c
> > +++ b/kernel/module/main.c
> > @@ -191,8 +191,17 @@ static inline int strong_try_module_get(struct module *mod)
> >  		return -ENOENT;
> >  }
> >  
> > -static inline void add_taint_module(struct module *mod, unsigned flag,
> > -				    enum lockdep_ok lockdep_ok)
> > +/**
> > + * add_taint_module: add a taint flag if not already set for a specific module
> > + * @mod: pointer to the module that caused the problem
> > + * @flag: one of the TAINT_* constants.
> > + * @lockdep_ok: whether lock debugging is still OK.
> > + *
> > + * If something bad has gone wrong, you'll want @lockdebug_ok = false, but for
> > + * some noteworthy-but-not-corrupting cases, it can be set to true.
> > + */
> > +void add_taint_module(struct module *mod, unsigned flag,
> > +		      enum lockdep_ok lockdep_ok)
> >  {
> >  	add_taint(flag, lockdep_ok);
> >  	set_bit(flag, &mod->taints);
> > 
> > -- 
> > 2.55.0
> > 
> 
> Hi Greg,
> 
> I believe Sashiko [1] found a few valid concerns.
> 
> [1]: https://sashiko.dev/#/message/20260826102921.5B81B1F000E9%40smtp.kernel.org
> 

Yes it did, will fix that up for v2.

thanks,

greg k-h