From: Tyrel Datwyler Date: Thu, 15 Aug 2013 05:23:47 +0000 (-0700) Subject: powerpc/pseries: Pack update_props_workarea to map correctly to rtas buffer header X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d0ef440350ff9d1c72e52c837302df090c4d2725;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git powerpc/pseries: Pack update_props_workarea to map correctly to rtas buffer header The work area buffer returned by the ibm,update-properties rtas call contains 20 bytes of header information prior to the property value descriptor data. Currently update_dt_node tries to advance over this header using sizeof(upwa). The update_props_workarea struct contains 20 bytes worth of fields, that map to the relevant header data, but the sizeof the structure is 24 bytes due to 4 bytes of padding at the end of the structure. Packing the structure ensures that we don't advance too far over the rtas buffer. Signed-off-by: Tyrel Datwyler Acked-by: Nathan Fontenot Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c index aaae85de08fb..023e35470760 100644 --- a/arch/powerpc/platforms/pseries/mobility.c +++ b/arch/powerpc/platforms/pseries/mobility.c @@ -28,7 +28,7 @@ struct update_props_workarea { u32 state; u64 reserved; u32 nprops; -}; +} __packed; #define NODE_ACTION_MASK 0xff000000 #define NODE_COUNT_MASK 0x00ffffff