bisecting fixing commit since 958e517f4e16952e9a2e2d58fd32d28ae4e23dda
building syzkaller on fcdb12ba70875c410749932abf39160d19c753d9
testing commit 958e517f4e16952e9a2e2d58fd32d28ae4e23dda with gcc (GCC) 8.4.1 20210217
kernel signature: 4fc1d66a70f033c1e562753e7d8f228300667651c7d4b8879be928f446b51dca
run #0: crashed: KASAN: use-after-free Read in tasklet_action
run #1: crashed: KASAN: use-after-free Read in tasklet_action
run #2: crashed: KASAN: use-after-free Read in tasklet_action
run #3: crashed: KASAN: use-after-free Read in tasklet_action
run #4: crashed: KASAN: use-after-free Read in tasklet_action
run #5: crashed: KASAN: use-after-free Read in tasklet_action
run #6: crashed: KASAN: use-after-free Read in tasklet_action
run #7: crashed: KASAN: use-after-free Read in tasklet_action
run #8: crashed: KASAN: use-after-free Read in tasklet_action
run #9: crashed: KASAN: use-after-free Read in tasklet_action
run #10: crashed: KASAN: use-after-free Read in tasklet_action
run #11: crashed: KASAN: use-after-free Read in tasklet_action
run #12: crashed: KASAN: use-after-free Write in __tasklet_schedule
run #13: crashed: KASAN: use-after-free Read in tasklet_action
run #14: crashed: KASAN: use-after-free Read in tasklet_action
run #15: crashed: KASAN: use-after-free Read in tasklet_action
run #16: crashed: KASAN: use-after-free Read in tasklet_action
run #17: crashed: KASAN: use-after-free Read in tasklet_action
run #18: crashed: KASAN: use-after-free Read in tasklet_action
run #19: crashed: KASAN: use-after-free Read in tasklet_action
testing current HEAD 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
testing commit 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85 with gcc (GCC) 8.4.1 20210217
kernel signature: 7ddd4c135dfeb6c016ad7c9fb6d98bc764f9540fc4e242d079962c0c57b756df
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m54.343197082s (build: 16m39.850553725s, test: 9m50.685046649s)
the crash still happens on HEAD
commit msg: Linux 4.14.236
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout