bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67 building syzkaller on 5abc3f1ab298244473b613c289f1536e366fcf04 testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 846bee43fc339aec867e5f43f5b5e35391b575e6e2778663a9270aa901acff9f run #0: crashed: general protection fault in diFree run #1: crashed: KASAN: use-after-free Read in diFree run #2: crashed: KASAN: use-after-free Read in diFree run #3: crashed: KASAN: use-after-free Read in diFree run #4: crashed: general protection fault in diFree run #5: crashed: general protection fault in diFree run #6: crashed: KASAN: use-after-free Read in diFree run #7: crashed: KASAN: use-after-free Read in diFree run #8: crashed: KASAN: use-after-free Read in diFree run #9: crashed: general protection fault in diFree run #10: crashed: general protection fault in diFree run #11: crashed: KASAN: use-after-free Read in diFree run #12: crashed: KASAN: use-after-free Read in diFree run #13: crashed: KASAN: use-after-free Read in diFree run #14: crashed: KASAN: use-after-free Read in diFree run #15: crashed: general protection fault in diFree run #16: crashed: general protection fault in diFree run #17: crashed: KASAN: use-after-free Read in diFree run #18: crashed: general protection fault in diFree run #19: crashed: KASAN: use-after-free Read in diFree testing current HEAD bbb957e1bd4a337c0d10d599d284a7475bca47cb testing commit bbb957e1bd4a337c0d10d599d284a7475bca47cb compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: b8c21ec2a89b8936fdb6bcbcfd05fca6dbaba19ca8919403c4a94ec0f25cbe90 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 28m36.042579751s (build: 20m48.035771595s, test: 6m57.185392072s) the crash still happens on HEAD commit msg: Linux 4.14.263 crash: unregister_netdevice: waiting for DEV to become free can: request_module (can-proto-0) failed. Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout