On Wed, 2020-09-23 at 16:13 +0800, kernel test robot wrote: > Hi Nikolay, > > I love your patch! Perhaps something to improve: > > [auto build test WARNING on net-next/master] > > url: > https://github.com/0day-ci/linux/commits/Nikolay-Aleksandrov/net-bridge-mcast-IGMPv3-MLDv2-fast-path-part-2/20200922-153321 > base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git > 92ec804f3dbf0d986f8e10850bfff14f316d7aaf > config: i386-randconfig-m021-20200923 (attached as .config) > compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <l...@intel.com> > > New smatch warnings: > net/bridge/br_multicast.c:980 __br_multicast_add_group() error: potential > null dereference 'mp'. (br_multicast_new_group returns null) > > Old smatch warnings: > include/linux/u64_stats_sync.h:128 u64_stats_update_begin() warn: statement > has no effect 31 >
This report is wrong, br_multicast_new_group() cannot return NULL. It always returns ERR_PTR() of whatever error happened and there is an IS_ERR() check afterwards. Thanks.
