bisecting fixing commit since 670d6552eda8ff0c5f396d3d6f0174237917c66c
building syzkaller on a8529b82fb3bb45832b08a099e7eb51707da9b37
testing commit 670d6552eda8ff0c5f396d3d6f0174237917c66c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0dd3ef7e715cae677a150b25abcd098063d07f4947bfcb51e627f4e794fb886d
all runs: crashed: KASAN: use-after-free Read in ip_tunnel_xmit
testing current HEAD af1af6ebca0e28a97e5f802b9da695678fcd226a
testing commit af1af6ebca0e28a97e5f802b9da695678fcd226a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b45a3376976d15e04ca7a97ef5618a5faea1fefe2ad87bf4ce0869015820d943
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 24m14.107344945s (build: 17m11.901252625s, test: 6m32.718098227s)
the crash still happens on HEAD
commit msg: Linux 4.14.274
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 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: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout