bisecting fixing commit since 4b6c093e21d36bede0fd88fd0aeb3b03647260e4 building syzkaller on 424dd8e7b52828cad44ce653a5d4ac30670f5e2c testing commit 4b6c093e21d36bede0fd88fd0aeb3b03647260e4 with gcc (GCC) 8.4.1 20210217 kernel signature: 8c9d1a13622c1d77dd8186e3c6f86a6adb657c867589e56f1aae1c651e3d66ff run #0: crashed: BUG: workqueue lockup run #1: crashed: BUG: workqueue lockup run #2: crashed: BUG: soft lockup in smp_call_function run #3: crashed: BUG: soft lockup in smp_call_function run #4: crashed: BUG: workqueue lockup run #5: crashed: BUG: workqueue lockup run #6: crashed: BUG: workqueue lockup run #7: crashed: BUG: workqueue lockup run #8: crashed: INFO: rcu detected stall in addrconf_dad_work run #9: crashed: no output from test machine run #10: crashed: no output from test machine run #11: crashed: no output from test machine run #12: crashed: no output from test machine run #13: crashed: no output from test machine run #14: crashed: no output from test machine run #15: crashed: no output from test machine run #16: crashed: no output from test machine run #17: crashed: no output from test machine run #18: crashed: no output from test machine run #19: crashed: INFO: rcu detected stall in addrconf_dad_work testing current HEAD fe07bfda2fb9cdef8a4d4008a409bb02f35f1bd8 testing commit fe07bfda2fb9cdef8a4d4008a409bb02f35f1bd8 with gcc (GCC) 10.2.1 20210217 kernel signature: 64416024d68a63dda0622e0afe02c55af77e8828c81eca50c4b72e461542f161 run #0: crashed: BUG: soft lockup in smp_call_function run #1: crashed: BUG: soft lockup in smp_call_function run #2: crashed: BUG: soft lockup in smp_call_function run #3: crashed: no output from test machine run #4: crashed: no output from test machine run #5: crashed: no output from test machine run #6: crashed: no output from test machine run #7: crashed: no output from test machine run #8: crashed: no output from test machine run #9: crashed: no output from test machine revisions tested: 2, total time: 28m49.412016049s (build: 12m15.94137804s, test: 15m49.804707545s) the crash still happens on HEAD commit msg: Linux 5.12-rc1 crash: no output from test machine