bisecting fixing commit since d6765985a42a660f078896d5c5b27f97c580a490 building syzkaller on 9d2ab5dfe7727dfea4b9b279f4edf731acb386ef testing commit d6765985a42a660f078896d5c5b27f97c580a490 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 65241d6ac4131102e3bb9c9a61f5d375abcc730a52f149fb3b1cdca04a394b59 run #0: basic kernel testing failed: BUG: sleeping function called from invalid context in lock_sock_nested run #1: crashed: BUG: sleeping function called from invalid context in corrupted run #2: crashed: INFO: rcu detected stall in net_tx_action run #3: crashed: INFO: rcu detected stall in net_tx_action run #4: crashed: INFO: rcu detected stall in net_tx_action run #5: crashed: INFO: rcu detected stall in net_tx_action run #6: crashed: INFO: rcu detected stall in net_tx_action run #7: crashed: INFO: rcu detected stall in mac80211_hwsim_beacon run #8: crashed: INFO: rcu detected stall in netlink_sendmsg run #9: crashed: BUG: soft lockup in mac80211_hwsim_beacon run #10: crashed: INFO: rcu detected stall in mac80211_hwsim_beacon run #11: crashed: INFO: rcu detected stall in tc_modify_qdisc run #12: crashed: INFO: rcu detected stall in ieee80211_iface_work run #13: crashed: INFO: rcu detected stall in tc_modify_qdisc run #14: crashed: BUG: soft lockup in mac80211_hwsim_beacon run #15: crashed: BUG: soft lockup in __do_softirq run #16: crashed: INFO: rcu detected stall in net_tx_action run #17: crashed: INFO: rcu detected stall in __do_munmap run #18: crashed: INFO: rcu detected stall in ieee80211_iface_work run #19: crashed: INFO: rcu detected stall in smp_call_function testing current HEAD c21cabb0fd0b54b8b54235fc1ecfe1195a23bcb2 testing commit c21cabb0fd0b54b8b54235fc1ecfe1195a23bcb2 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: d6405936bd84ccf534a3a29458efdb394c5916ed0adb5852e76ab2f5104a61d1 run #0: crashed: INFO: rcu detected stall in smp_call_function run #1: crashed: INFO: rcu detected stall in sys_exit_group run #2: crashed: INFO: rcu detected stall in try_check_zero run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: no output from test machine run #5: crashed: no output from test machine run #6: crashed: INFO: rcu detected stall in gc_worker run #7: crashed: no output from test machine run #8: crashed: BUG: workqueue lockup run #9: crashed: no output from test machine revisions tested: 2, total time: 28m8.436739934s (build: 12m3.042422933s, test: 15m13.519599859s) the crash still happens on HEAD commit msg: net: stmmac: Fix unset max_speed difference between DT and non-DT platforms crash: no output from test machine