bisecting fixing commit since 4e68c9b0763ff55eaa69d6e519f07515f1c9037b
building syzkaller on f115ae985a399ddce060f448097b8068450a8f48
testing commit 4e68c9b0763ff55eaa69d6e519f07515f1c9037b
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 9b8098c7a24aa70a98187b3236cb4ca26251acae14b8428aa42cdfe896807c31
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
testing commit 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 85b02e55fdd0ab9205648b8ca07f2d506812f0ceaafa856b1f45f97fa5cc7c7b
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m19.602412666s (build: 18m2.723843958s, test: 6m29.749032359s)
the crash still happens on HEAD
commit msg: Linux 4.14.281
crash: unregister_netdevice: waiting for DEV to become free
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout