bisecting fixing commit since c636eef2ee3696f261a35f34989842701a107895
building syzkaller on bb3e5fe608aa1d99df8f41cee2dcc33fdef06123
testing commit c636eef2ee3696f261a35f34989842701a107895 with gcc (GCC) 8.4.1 20210217
kernel signature: 895ed87701699f9ddb3228f1793599cde89a97f336dbf551771cb49cd9776408
run #0: crashed: BUG: soft lockup in smp_call_function
run #1: crashed: BUG: soft lockup in smp_call_function
run #2: crashed: BUG: workqueue lockup
run #3: crashed: BUG: soft lockup in smp_call_function
run #4: crashed: BUG: soft lockup in smp_call_function
run #5: crashed: BUG: soft lockup in smp_call_function
run #6: crashed: BUG: soft lockup in smp_call_function
run #7: crashed: BUG: soft lockup in smp_call_function
run #8: crashed: BUG: soft lockup in smp_call_function
run #9: crashed: BUG: soft lockup in clone
run #10: crashed: BUG: soft lockup in smp_call_function
run #11: crashed: BUG: soft lockup in smp_call_function
run #12: crashed: BUG: soft lockup in smp_call_function
run #13: crashed: BUG: workqueue lockup
run #14: crashed: BUG: soft lockup in smp_call_function
run #15: crashed: BUG: soft lockup in smp_call_function
run #16: crashed: BUG: soft lockup in smp_call_function
run #17: crashed: BUG: soft lockup in smp_call_function
run #18: crashed: no output from test machine
run #19: crashed: INFO: rcu detected stall in do_idle
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: BUG: soft lockup in smp_call_function
run #4: crashed: BUG: workqueue lockup
run #5: crashed: BUG: soft lockup in smp_call_function
run #6: crashed: BUG: soft lockup in smp_call_function
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: 28m49.541871605s (build: 12m15.445050814s, test: 15m45.981783378s)
the crash still happens on HEAD
commit msg: Linux 5.12-rc1
crash: no output from test machine