bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on f54a5c0916af7d798b204eb70c484f154d69e0a3
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d335443cbddfaed3e0847508f0994bbc483220af0cd910735f882040f557fd64
all runs: crashed: WARNING: suspicious RCU usage in tcp_disconnect
testing current HEAD 1ccc597f801cbecffcaed7f2d1f620ec48f6f8df
testing commit 1ccc597f801cbecffcaed7f2d1f620ec48f6f8df
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 36eb3652e2bed72c7f21b6b3018d62900ea5db88fed7969d38603f06ed1239d8
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m52.241838861s (build: 20m18.253423612s, test: 7m7.61874703s)
the crash still happens on HEAD
commit msg: Linux 4.14.283
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout