bisecting fixing commit since 2762b48e9611529239da2e68cba908dbbec9805f building syzkaller on 63631df1539816bc62c7be40779c5f3e23b23b2f testing commit 2762b48e9611529239da2e68cba908dbbec9805f compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: b3ea00693735395c3beace39dc22bbec036c653dc1efb5400e1271336d929bce all runs: crashed: general protection fault in hsr_dev_change_mtu testing current HEAD 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53 testing commit 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 93cf26e6be63f56c2fff91641ba492a18da1b8894196359979c70a581dbd6cd0 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 24m50.755907257s (build: 18m2.349977687s, test: 6m13.113228804s) the crash still happens on HEAD commit msg: Linux 4.14.276 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout