• Kevin Cernekee's avatar
    of: Fix crash if an earlycon driver is not found · ab74d00a
    Kevin Cernekee authored
    __earlycon_of_table_sentinel.compatible is a char[128], not a pointer, so
    it will never be NULL.  Checking it against NULL causes the match loop to
    run past the end of the array, and eventually match a bogus entry, under
    the following conditions:
    
     - Kernel command line specifies "earlycon" with no parameters
     - DT has a stdout-path pointing to a UART node
     - The UART driver doesn't use OF_EARLYCON_DECLARE (or maybe the console
       driver is compiled out)
    
    Fix this by checking to see if match->compatible is a non-empty string.
    Signed-off-by: default avatarKevin Cernekee <cernekee@gmail.com>
    Cc: <stable@vger.kernel.org> # 3.16+
    Signed-off-by: default avatarRob Herring <robh@kernel.org>
    ab74d00a
fdt.c 27.8 KB