bisecting fixing commit since 1d177c0872ab99ac8d1fe09376a56c2911a837c0
building syzkaller on 26967e354e030f6a022b7a60a7c9899ec25923aa
testing commit 1d177c0872ab99ac8d1fe09376a56c2911a837c0
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 9428ea2f74b08b6db86c8b217e42b807d4ac7dfac7e789c798a1d71c28672255
all runs: crashed: WARNING in __btrfs_close_devices
testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b137c8c2211ff4c80f00207fe94149b790686d6bdf6e1fa7441f2c741b8c96c4
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m40.343704986s (build: 19m23.975458794s, test: 6m31.603832396s)
the crash still happens on HEAD
commit msg: Linux 4.14.246
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 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: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout