bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on 5abc3f1ab298244473b613c289f1536e366fcf04
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 with gcc (GCC) 8.4.1 20210217
kernel signature: 85421839883293ccb0d28695348fb1f6900358ce6c65a976fc6b183546164fc8
run #0: crashed: KASAN: use-after-free Read in diFree
run #1: crashed: KASAN: use-after-free Read in diFree
run #2: crashed: general protection fault in diFree
run #3: crashed: general protection fault in diFree
run #4: crashed: KASAN: use-after-free Read 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: KASAN: use-after-free Read in diFree
run #11: crashed: general protection fault in diFree
run #12: crashed: general protection fault in diFree
run #13: crashed: KASAN: use-after-free Read in diFree
run #14: crashed: general protection fault in diFree
run #15: crashed: KASAN: use-after-free Read 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: general protection fault in diFree
testing current HEAD ad8397a84e1e425e3f8221638cee2bfa237d9b2c
testing commit ad8397a84e1e425e3f8221638cee2bfa237d9b2c with gcc (GCC) 8.4.1 20210217
kernel signature: 4d5cfbd9ca147f8c2144bf7b6d416648b8bcd81db10f1365e54869c770aebb54
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m37.67180706s (build: 18m32.352819905s, test: 6m37.958086866s)
the crash still happens on HEAD
commit msg: Linux 4.14.234
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: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout