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  • Roland McGrath's avatar
    elf core dump: fix get_user use · 92dc07b1
    Roland McGrath authored
    The elf_core_dump() code does its work with set_fs(KERNEL_DS) in force,
    so vma_dump_size() needs to switch back with set_fs(USER_DS) to safely
    use get_user() for a normal user-space address.
    Checking for VM_READ optimizes out the case where get_user() would fail
    anyway.  The vm_file check here was already superfluous given the control
    flow earlier in the function, so that is a cleanup/optimization unrelated
    to other changes but an obvious and trivial one.
    Reported-by: default avatarGerald Schaefer <>
    Signed-off-by: default avatarRoland McGrath <>