On Mon, 2021-05-10 at 15:43 +0200, Arnd Bergmann wrote: > On Mon, May 10, 2021 at 3:30 PM kernel test robot <lkp@xxxxxxxxx> wrote: > > All warnings (new ones prefixed by >>): > > > > In file included from include/linux/kernel.h:10, > > from include/linux/list.h:9, > > from include/linux/module.h:12, > > from drivers/net/arcnet/com20020.c:31: > > drivers/net/arcnet/com20020.c: In function 'com20020_reset': > > > > include/linux/compiler.h:70:32: warning: 'inbyte' is used uninitialized in this function [-Wuninitialized] > > 70 | (__if_trace.miss_hit[1]++,1) : \ > > | ^ > > drivers/net/arcnet/com20020.c:286:9: note: 'inbyte' was declared here > > 286 | u_char inbyte; > > | ^~~~~~ > > This looks like a real problem with the patch: the insb()/insw()/insl() helpers > should memset(buffer, 0xff, size) to avoid using random stack data. > > Arnd Yes I agree, will send a v6 shortly. Thanks.
