bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on 5abc3f1ab298244473b613c289f1536e366fcf04
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 with gcc (GCC) 8.4.1 20210217
kernel signature: 7eec8d2ff4140b599b14151eb675f5d805ee1abb68c2c6bc50414349b6120be8
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: general protection fault 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: general protection fault in diFree
run #8: crashed: general protection fault in diFree
run #9: crashed: general protection fault in diFree
run #10: crashed: general protection fault in diFree
run #11: crashed: general protection fault in diFree
run #12: crashed: KASAN: use-after-free Read in diFree
run #13: crashed: general protection fault in diFree
run #14: crashed: KASAN: use-after-free Read in diFree
run #15: crashed: KASAN: use-after-free Read in diFree
run #16: crashed: KASAN: use-after-free Read in diFree
run #17: crashed: KASAN: use-after-free Read in diFree
run #18: crashed: KASAN: use-after-free Read in diFree
run #19: crashed: KASAN: use-after-free Read in diFree
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: 33fdf22102f62e57339a8a9d5ebda0ef6e071dbd73eabcce4f2bdc08391acd8c
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m47.218642601s (build: 19m50.258070835s, test: 6m25.517959439s)
the crash still happens on HEAD
commit msg: Linux 4.14.237
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 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