bisecting fixing commit since 670d6552eda8ff0c5f396d3d6f0174237917c66c
building syzkaller on a8529b82fb3bb45832b08a099e7eb51707da9b37
testing commit 670d6552eda8ff0c5f396d3d6f0174237917c66c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4d0c602ec4ab44f5bc4d03d7da9ab7b3f677807103c32f21db950376c9a711aa
all runs: crashed: KASAN: use-after-free Read in ip_tunnel_xmit
testing current HEAD 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
testing commit 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: aa50428aa1356b7d064af8a5e31d1876258b0f981bd264a99cb06d40b0d73d92
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m34.664890308s (build: 15m55.277415133s, test: 6m12.143087494s)
the crash still happens on HEAD
commit msg: Linux 4.14.247
crash: unregister_netdevice: waiting for DEV to become free
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: hci1 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout