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: crashed: BUG: sleeping function called from invalid context in lock_sock_nested
run #1: crashed: INFO: rcu detected stall in addrconf_rs_timer
run #2: crashed: INFO: rcu detected stall in net_tx_action
run #3: crashed: BUG: soft lockup in mac80211_hwsim_beacon
run #4: crashed: INFO: rcu detected stall in net_tx_action
run #5: crashed: INFO: rcu detected stall in __hrtimer_run_queues
run #6: crashed: INFO: rcu detected stall in ieee80211_iface_work
run #7: crashed: INFO: rcu detected stall in tc_modify_qdisc
run #8: crashed: INFO: rcu detected stall in mac80211_hwsim_beacon
run #9: crashed: INFO: rcu detected stall in ieee80211_iface_work
run #10: crashed: INFO: rcu detected stall in batadv_dat_purge
run #11: crashed: INFO: rcu detected stall in ieee80211_tasklet_handler
run #12: crashed: INFO: rcu detected stall in smp_call_function
run #13: crashed: INFO: rcu detected stall in mac80211_hwsim_beacon
run #14: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "/tmp/syz-executor719097018" "root@10.128.1.5:./syz-executor719097018"]: exit status 1
ssh: connect to host 10.128.1.5 port 22: Connection timed out
lost connection

run #15: crashed: INFO: rcu detected stall in mac80211_hwsim_beacon
run #16: crashed: BUG: soft lockup in mac80211_hwsim_beacon
run #17: crashed: INFO: rcu detected stall in smp_call_function
run #18: crashed: BUG: workqueue lockup
run #19: crashed: BUG: soft lockup in ieee80211_iface_work
testing current HEAD 881cc731df6af99a21622e9be25a23b81adcd10b
testing commit 881cc731df6af99a21622e9be25a23b81adcd10b
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: db9afe96482612e26b0ff76428a423ee4180aba33d7be68c410967912a7387f9
run #0: crashed: INFO: rcu detected stall in smp_call_function
run #1: crashed: BUG: soft lockup in tc_modify_qdisc
run #2: crashed: BUG: soft lockup in net_tx_action
run #3: crashed: INFO: rcu detected stall in gc_worker
run #4: crashed: BUG: soft lockup in smp_call_function
run #5: crashed: INFO: rcu detected stall in batadv_tt_purge
run #6: crashed: INFO: rcu detected stall in wg_packet_handshake_receive_worker
run #7: crashed: INFO: rcu detected stall in batadv_nc_worker
run #8: crashed: INFO: rcu detected stall in sys_setsockopt
run #9: crashed: INFO: rcu detected stall in corrupted
revisions tested: 2, total time: 29m15.272162717s (build: 13m21.492691595s, test: 15m0.397795126s)
the crash still happens on HEAD
commit msg: net: phy: Fix qca8081 with speeds lower than 2.5Gb/s
crash: INFO: rcu detected stall in corrupted
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=11361 jiffies, g=6649, q=1111)
rcu: All QSes seen, last rcu_preempt kthread activity 6733 (4294957058-4294950325), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 6733 jiffies! g6649 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:28816 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x90d/0x2680 kernel/sched/core.c:6295