bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on f54a5c0916af7d798b204eb70c484f154d69e0a3
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4c25eb2dd50722bec7a5a4e175c7590c150fe5f8e430a65a9491f37387913d3c
all runs: crashed: WARNING: suspicious RCU usage in tcp_disconnect
testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0cbcf72d130831c0fc9934a8b2ea826555494286cfd185ec384c6f6445f67215
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m29.998183414s (build: 20m25.513130378s, test: 6m30.533617576s)
the crash still happens on HEAD
commit msg: Linux 4.14.246
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout