bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on 77e2b66864e69c17416614228723a1ebd3581ddc
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a3b77262a86f444496684602df9ec8f81f919d477c9a9a906060514c70200f81
all runs: crashed: possible deadlock in lock_trace
testing current HEAD f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
testing commit f11944f1aa1cda3fd8b4edc71e3cf9dceb40234f
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 39daa00ebc6ea74074c6898ac1365b0ced111a7e2532b9a792a8374375ead6cb
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m8.483773115s (build: 22m2.577875515s, test: 6m30.600685643s)
the crash still happens on HEAD
commit msg: Linux 4.14.248
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout