bisecting fixing commit since 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c
building syzkaller on 624dad51316f9973e1349b6c71e789737d1e00d9
testing commit 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c with gcc (GCC) 8.4.1 20210217
kernel signature: 290833143ed4d8fd94f4cd43e42ee3398a90013b3bb7ec3cab451d00cdfb086a
run #0: crashed: KASAN: use-after-free Read in chrdev_open
run #1: crashed: KASAN: use-after-free Read in chrdev_open
run #2: crashed: KASAN: use-after-free Read in chrdev_open
run #3: crashed: KASAN: use-after-free Read in chrdev_open
run #4: crashed: KASAN: use-after-free Read in chrdev_open
run #5: crashed: KASAN: use-after-free Read in cd_forget
run #6: crashed: KASAN: use-after-free Read in chrdev_open
run #7: crashed: KASAN: use-after-free Read in chrdev_open
run #8: crashed: KASAN: use-after-free Read in chrdev_open
run #9: crashed: KASAN: use-after-free Read in chrdev_open
run #10: crashed: KASAN: use-after-free Read in chrdev_open
run #11: crashed: KASAN: use-after-free Read in chrdev_open
run #12: crashed: KASAN: use-after-free Read in chrdev_open
run #13: crashed: KASAN: use-after-free Read in chrdev_open
run #14: crashed: KASAN: use-after-free Read in chrdev_open
run #15: crashed: KASAN: use-after-free Read in chrdev_open
run #16: crashed: KASAN: use-after-free Read in chrdev_open
run #17: crashed: KASAN: use-after-free Read in chrdev_open
run #18: crashed: KASAN: use-after-free Read in chrdev_open
run #19: crashed: KASAN: use-after-free Read in chrdev_open
testing current HEAD 96afcb20f36f07683aaa342e592ea8ec76fd1fa6
testing commit 96afcb20f36f07683aaa342e592ea8ec76fd1fa6 with gcc (GCC) 8.4.1 20210217
kernel signature: d8f553624669b9aef2ad97ee82c1b698ef3e20eb65ce2c4d21958279c15162ee
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m58.257371871s (build: 20m45.985400759s, test: 6m27.398522724s)
the crash still happens on HEAD
commit msg: Linux 4.14.233
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout