[RFC,v2,0/2] module: Introduce module unload taint tracking

Message

Aaron Tomlin April 19, 2022, 3:03 p.m. UTC

Hi Luis,

This is based on the latest mcgrof/modules-next branch.  I have decided
still to use RCU even though no entry is ever removed from the unloaded
tainted modules list. That being said, if I understand correctly, it is not
safe in some instances to use 'module_mutex' in print_modules(). So instead
we disable preemption to ensure list traversal with concurrent list
manipulation e.g. list_add_rcu(), is safe too.

Please let me know your thoughts.

Aaron Tomlin (2):
  module: Make module_flags_taint() accept a module's taints bitmap
    directly
  module: Introduce module unload taint tracking

 init/Kconfig         | 11 +++++++
 kernel/module/main.c | 76 +++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 83 insertions(+), 4 deletions(-)


base-commit: eeaec7801c421e17edda6e45a32d4a5596b633da