• Linus Torvalds's avatar
    Merge branch 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace · 3950e975
    Linus Torvalds authored
    Pull execve updates from Eric Biederman:
     "During the development of v5.7 I ran into bugs and quality of
      implementation issues related to exec that could not be easily fixed
      because of the way exec is implemented. So I have been diggin into
      exec and cleaning up what I can.
    
      This cycle I have been looking at different ideas and different
      implementations to see what is possible to improve exec, and cleaning
      the way exec interfaces with in kernel users. Only cleaning up the
      interfaces of exec with rest of the kernel has managed to stabalize
      and make it through review in time for v5.9-rc1 resulting in 2 sets of
      changes this cycle.
    
       - Implement kernel_execve
    
       - Make the user mode driver code a better citizen
    
      With kernel_execve the code size got a little larger as the copying of
      parameters from userspace and copying of parameters from userspace is
      now separate. The good news is kernel threads no longer need to play
      games with set_fs to use exec. Which when combined with the rest of
      Christophs set_fs changes should security bugs with set_fs much more
      difficult"
    
    * 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (23 commits)
      exec: Implement kernel_execve
      exec: Factor bprm_stack_limits out of prepare_arg_pages
      exec: Factor bprm_execve out of do_execve_common
      exec: Move bprm_mm_init into alloc_bprm
      exec: Move initialization of bprm->filename into alloc_bprm
      exec: Factor out alloc_bprm
      exec: Remove unnecessary spaces from binfmts.h
      umd: Stop using split_argv
      umd: Remove exit_umh
      bpfilter: Take advantage of the facilities of struct pid
      exit: Factor thread_group_exited out of pidfd_poll
      umd: Track user space drivers with struct pid
      bpfilter: Move bpfilter_umh back into init data
      exec: Remove do_execve_file
      umh: Stop calling do_execve_file
      umd: Transform fork_usermode_blob into fork_usermode_driver
      umd: Rename umd_info.cmdline umd_info.driver_name
      umd: For clarity rename umh_info umd_info
      umh: Separate the user mode driver and the user mode helper support
      umh: Remove call_usermodehelper_setup_file.
      ...
    3950e975
Makefile 4.8 KB