bisecting fixing commit since a581387e415bbb0085e7e67906c8f4a99746590e building syzkaller on 18d18b591b354e07ba76be8f115b7119d49056a9 testing commit a581387e415bbb0085e7e67906c8f4a99746590e with gcc (GCC) 8.1.0 kernel signature: eaf5c43053dcea32da767764f3008d0736cc9ae6e14eada77dd627f81061b837 run #0: crashed: BUG: workqueue lockup run #1: crashed: BUG: workqueue lockup run #2: crashed: BUG: workqueue lockup run #3: crashed: BUG: workqueue lockup run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in clock_adjtime run #6: crashed: no output from test machine run #7: crashed: no output from test machine run #8: crashed: BUG: soft lockup in smp_call_function run #9: crashed: BUG: soft lockup in smp_call_function testing current HEAD 0e9bcda5d286f4a26a5407bb38f55c55b453ecfb testing commit 0e9bcda5d286f4a26a5407bb38f55c55b453ecfb with gcc (GCC) 8.1.0 kernel signature: cb3cafd5d925e32b224e8489f47fc9de554950364ea3324b4cb828de5cbf1d3e run #0: crashed: BUG: workqueue lockup run #1: crashed: INFO: rcu detected stall in smp_call_function run #2: crashed: INFO: rcu detected stall in do_idle run #3: crashed: INFO: rcu detected stall in do_idle run #4: crashed: INFO: rcu detected stall in smp_call_function run #5: crashed: INFO: rcu detected stall in smp_call_function run #6: crashed: INFO: rcu detected stall in do_idle 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: 26m38.987836913s (build: 10m33.619314155s, test: 15m14.459765474s) the crash still happens on HEAD commit msg: Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux crash: no output from test machine