bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae building syzkaller on 97183ed760478c5b970c8c549d99c8147a72e293 testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6d5a1e57a6d335efe1c02f87d75d7097bd0acae78a1af28ab2bcfe5e5ac372f7 all runs: crashed: KASAN: use-after-free Read in drm_getunique testing current HEAD b86ee2b7ae42b6b37a918b66236608e2cc325f59 testing commit b86ee2b7ae42b6b37a918b66236608e2cc325f59 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: c1bc37df1e266547fe5f92bebc4d6f764154445d4738af2a7e3dd6be4ea784da all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 28m2.724800885s (build: 21m0.951780285s, test: 6m31.631155594s) the crash still happens on HEAD commit msg: Linux 4.14.264 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout