bisecting fixing commit since dffb5c6ff09c51ed585e3e7665143df103867fc8
building syzkaller on e7f9308d43198223b192f94a7030f9ebdf92e551
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 6f5f782af2d841eee88bba681f1c62931da454f158179aa050f0102daab9c7a3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 424a46ea058e160ae6fdd0693092ba79da533f26
testing commit 424a46ea058e160ae6fdd0693092ba79da533f26
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a96bc28cd6d51a55f96b04f3ed2d1c9dc56cb2c9abc12da03998574a2d1b0462
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m29.363258654s (build: 20m34.295520168s, test: 6m16.629685128s)
the crash still happens on HEAD
commit msg: Linux 4.14.288
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout