bisecting fixing commit since 2762b48e9611529239da2e68cba908dbbec9805f
building syzkaller on 63631df1539816bc62c7be40779c5f3e23b23b2f
testing commit 2762b48e9611529239da2e68cba908dbbec9805f
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0e5a4ff31d411e687cf890a2929a64c72cfc42b05c132d60960cff7ab933372f
all runs: crashed: general protection fault in hsr_dev_change_mtu
testing current HEAD 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b111f563a928b9d75827c4918f7b8974c20c9b74cd3f4464bd8566a28b4bb39f
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m4.413485463s (build: 14m42.698153593s, test: 6m51.063845935s)
the crash still happens on HEAD
commit msg: Linux 4.14.258
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout