FYI, we noticed the following commit (built with gcc-7): commit: 5fc494225c1eb81309cc4c91f183cd30e4edb674 ("netdevsim: create devlink instance per netdevsim instance") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: kernel_selftests with following parameters: group: kselftests-02 test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel. test-url: https://www.kernel.org/doc/Documentation/kselftest.txt on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 8G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <rong.a.chen(a)intel.com&gt; selftests: net: psock_snd.sh ======================================== dgram tx: 128 rx: 142 ./psock_snd: recv: Resource temporarily unavailable not ok 1..21 selftests: net: psock_snd.sh [FAIL] To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Rong Chen