Eric Lee / smarc-fsl-linux-kernel

11 Sep, 2015

1 commit

  • 7cbea8dc0   mm: mark most vm_operations_struct const ... Browse Code »

    With two exceptions (drm/qxl and drm/radeon) all vm_operations_struct
    structs should be constant.

    Signed-off-by: Kirill A. Shutemov
    Reviewed-by: Oleg Nesterov
    Cc: "H. Peter Anvin"
    Cc: Andy Lutomirski
    Cc: Dave Hansen
    Cc: Ingo Molnar
    Cc: Minchan Kim
    Cc: Thomas Gleixner
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Kirill A. Shutemov
     

02 Mar, 2015

1 commit

  • f4c72c703   android: binder: fix binder mmap failures ... Browse Code »

    binder_update_page_range() initializes only addr and size
    fields in 'struct vm_struct tmp_area;' and passes it to
    map_vm_area().

    Before 71394fe50146 ("mm: vmalloc: add flag preventing guard hole allocation")
    this was because map_vm_area() didn't use any other fields
    in vm_struct except addr and size.

    Now get_vm_area_size() (used in map_vm_area()) reads vm_struct's
    flags to determine whether vm area has guard hole or not.

    binder_update_page_range() don't initialize flags field, so
    this causes following binder mmap failures:
    -----------[ cut here ]------------
    WARNING: CPU: 0 PID: 1971 at mm/vmalloc.c:130
    vmap_page_range_noflush+0x119/0x144()
    CPU: 0 PID: 1971 Comm: healthd Not tainted 4.0.0-rc1-00399-g7da3fdc-dirty #157
    Hardware name: ARM-Versatile Express
    [] (unwind_backtrace) from [] (show_stack+0x11/0x14)
    [] (show_stack) from [] (dump_stack+0x59/0x7c)
    [] (dump_stack) from [] (warn_slowpath_common+0x55/0x84)
    [] (warn_slowpath_common) from []
    (warn_slowpath_null+0x17/0x1c)
    [] (warn_slowpath_null) from []
    (vmap_page_range_noflush+0x119/0x144)
    [] (vmap_page_range_noflush) from [] (map_vm_area+0x27/0x48)
    [] (map_vm_area) from []
    (binder_update_page_range+0x12f/0x27c)
    [] (binder_update_page_range) from []
    (binder_mmap+0xbf/0x1ac)
    [] (binder_mmap) from [] (mmap_region+0x2eb/0x4d4)
    [] (mmap_region) from [] (do_mmap_pgoff+0x1e7/0x250)
    [] (do_mmap_pgoff) from [] (vm_mmap_pgoff+0x45/0x60)
    [] (vm_mmap_pgoff) from [] (SyS_mmap_pgoff+0x5d/0x80)
    [] (SyS_mmap_pgoff) from [] (ret_fast_syscall+0x1/0x5c)
    ---[ end trace 48c2c4b9a1349e54 ]---
    binder: 1982: binder_alloc_buf failed to map page at f0e00000 in kernel
    binder: binder_mmap: 1982 b6bde000-b6cdc000 alloc small buf failed -12

    Use map_kernel_range_noflush() instead of map_vm_area() as this is better
    API for binder's purposes and it allows to get rid of 'vm_struct tmp_area' at all.

    Fixes: 71394fe50146 ("mm: vmalloc: add flag preventing guard hole allocation")
    Signed-off-by: Andrey Ryabinin
    Reported-by: Amit Pundir
    Tested-by: Amit Pundir
    Acked-by: David Rientjes
    Tested-by: John Stultz
    Signed-off-by: Greg Kroah-Hartman

    Andrey Ryabinin
     

26 Jan, 2015

1 commit

  • 79af73079   Add security hooks to binder and implement the hooks for SELinux. ... Browse Code »

    Add security hooks to the binder and implement the hooks for SELinux.
    The security hooks enable security modules such as SELinux to implement
    controls over binder IPC. The security hooks include support for
    controlling what process can become the binder context manager
    (binder_set_context_mgr), controlling the ability of a process
    to invoke a binder transaction/IPC to another process (binder_transaction),
    controlling the ability of a process to transfer a binder reference to
    another process (binder_transfer_binder), and controlling the ability
    of a process to transfer an open file to another process (binder_transfer_file).

    These hooks have been included in the Android kernel trees since Android 4.3.

    (Updated to reflect upstream relocation and changes to the binder driver,
    changes to the LSM audit data structures, coding style cleanups, and
    to add inline documentation for the hooks).

    Signed-off-by: Stephen Smalley
    Acked-by: Nick Kralevich
    Acked-by: Jeffrey Vander Stoep
    Signed-off-by: Greg Kroah-Hartman

    Stephen Smalley
     

20 Oct, 2014

2 commits