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: soft lockup in smp_call_function
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 smp_call_function
run #10: crashed: BUG: soft lockup in smp_call_function
run #11: crashed: BUG: soft lockup in smp_call_function
run #12: crashed: BUG: workqueue lockup
run #13: crashed: BUG: soft lockup in smp_call_function
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: no output from test machine
run #18: crashed: no output from test machine
run #19: crashed: INFO: rcu detected stall in smp_call_function
testing current HEAD e49d033bddf5b565044e2abe4241353959bc9120
testing commit e49d033bddf5b565044e2abe4241353959bc9120 with gcc (GCC) 10.2.1 20210217
kernel signature: 14ca83185e3a7428602e80e08667f9033152edeff1c2b657dd1f7e6ef8240441
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: 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: no output from test machine
run #9: crashed: no output from test machine
revisions tested: 2, total time: 28m31.030280295s (build: 12m3.622751906s, test: 15m37.928614698s)
the crash still happens on HEAD
commit msg: Linux 5.12-rc6
crash: no output from test machine