bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on f24824d3d54060a7d878eeb35c47f85dab84966a
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2378f5e3964d22d739c14b8c7283ea41e25ec3d804c3cbac49f506306309335a
run #0: crashed: general protection fault in __tcf_idr_release
run #1: crashed: KASAN: stack-out-of-bounds Read in tcf_action_destroy
run #2: crashed: general protection fault in __tcf_idr_release
run #3: crashed: general protection fault in __tcf_idr_release
run #4: crashed: BUG: unable to handle kernel paging request in tcf_action_destroy
run #5: crashed: general protection fault in __tcf_idr_release
run #6: crashed: BUG: unable to handle kernel paging request in tcf_action_destroy
run #7: crashed: general protection fault in __tcf_idr_release
run #8: crashed: KASAN: stack-out-of-bounds Read in tcf_action_destroy
run #9: crashed: KASAN: stack-out-of-bounds Read in tcf_action_destroy
run #10: crashed: general protection fault in __tcf_idr_release
run #11: crashed: BUG: unable to handle kernel paging request in tcf_action_destroy
run #12: crashed: BUG: unable to handle kernel paging request in tcf_action_destroy
run #13: crashed: general protection fault in __tcf_idr_release
run #14: crashed: general protection fault in __tcf_idr_release
run #15: crashed: KASAN: use-after-free Read in tcf_action_destroy
run #16: crashed: general protection fault in __tcf_idr_release
run #17: crashed: general protection fault in __tcf_idr_release
run #18: crashed: general protection fault in __tcf_idr_release
run #19: crashed: KASAN: stack-out-of-bounds Read in tcf_action_destroy
testing current HEAD cd529693461026636f76d0395a42cb2439bbd368
testing commit cd529693461026636f76d0395a42cb2439bbd368
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 041a1c5b92ce145208967a0b0d17f34c484cb263fd2a5f24a2ab879ca78e4550
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m23.173490379s (build: 16m18.766527213s, test: 6m40.194683697s)
the crash still happens on HEAD
commit msg: Linux 4.14.253
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout