Eric Lee / smarc-fsl-linux-kernel

07 Jul, 2017

1 commit

  • 94f4a1618   mm: kmemleak: treat vm_struct as alternative reference to vmalloc'ed objects ... Browse Code »

    Kmemleak requires that vmalloc'ed objects have a minimum reference count
    of 2: one in the corresponding vm_struct object and the other owned by
    the vmalloc() caller. There are cases, however, where the original
    vmalloc() returned pointer is lost and, instead, a pointer to vm_struct
    is stored (see free_thread_stack()). Kmemleak currently reports such
    objects as leaks.

    This patch adds support for treating any surplus references to an object
    as additional references to a specified object. It introduces the
    kmemleak_vmalloc() API function which takes a vm_struct pointer and sets
    its surplus reference passing to the actual vmalloc() returned pointer.
    The __vmalloc_node_range() calling site has been modified accordingly.

    Link: http://lkml.kernel.org/r/1495726937-23557-4-git-send-email-catalin.marinas@arm.com
    Signed-off-by: Catalin Marinas
    Reported-by: "Luis R. Rodriguez"
    Cc: Michal Hocko
    Cc: Andy Lutomirski
    Cc: "Luis R. Rodriguez"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Catalin Marinas
     

12 Oct, 2016

1 commit

  • 9099daed9   mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping ... Browse Code »

    Some of the kmemleak_*() callbacks in memblock, bootmem, CMA convert a
    physical address to a virtual one using __va(). However, such physical
    addresses may sometimes be located in highmem and using __va() is
    incorrect, leading to inconsistent object tracking in kmemleak.

    The following functions have been added to the kmemleak API and they take
    a physical address as the object pointer. They only perform the
    corresponding action if the address has a lowmem mapping:

    kmemleak_alloc_phys
    kmemleak_free_part_phys
    kmemleak_not_leak_phys
    kmemleak_ignore_phys

    The affected calling places have been updated to use the new kmemleak
    API.

    Link: http://lkml.kernel.org/r/1471531432-16503-1-git-send-email-catalin.marinas@arm.com
    Signed-off-by: Catalin Marinas
    Reported-by: Vignesh R
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Catalin Marinas
     

19 Aug, 2016

1 commit