bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on f24824d3d54060a7d878eeb35c47f85dab84966a
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636 with gcc (GCC) 8.4.1 20210217
kernel signature: a2f5b2e9de5a9d6cd3dddee23e06e1b06628aa16749edddaf2e965d8b7c56d8e
run #0: crashed: general protection fault in __tcf_idr_release
run #1: crashed: general protection fault in __tcf_idr_release
run #2: crashed: general protection fault in __tcf_idr_release
run #3: crashed: general protection fault in __tcf_idr_release
run #4: crashed: general protection fault in __tcf_idr_release
run #5: crashed: general protection fault in __tcf_idr_release
run #6: crashed: general protection fault in __tcf_idr_release
run #7: crashed: KASAN: stack-out-of-bounds Read in tcf_action_destroy
run #8: crashed: general protection fault in __tcf_idr_release
run #9: crashed: general protection fault in __tcf_idr_release
run #10: crashed: KASAN: stack-out-of-bounds Read in tcf_action_destroy
run #11: crashed: general protection fault in __tcf_idr_release
run #12: crashed: general protection fault in __tcf_idr_release
run #13: crashed: general protection fault in __tcf_idr_release
run #14: crashed: general protection fault in __tcf_idr_release
run #15: crashed: KASAN: stack-out-of-bounds Read in tcf_action_destroy
run #16: crashed: KASAN: use-after-free Read in tcf_action_destroy
run #17: crashed: general protection fault in __tcf_idr_release
run #18: crashed: general protection fault in __tcf_idr_release
run #19: crashed: general protection fault in __tcf_idr_release
testing current HEAD ad8397a84e1e425e3f8221638cee2bfa237d9b2c
testing commit ad8397a84e1e425e3f8221638cee2bfa237d9b2c with gcc (GCC) 8.4.1 20210217
kernel signature: 211e00ab188bf84842e5a3b286be147e230919b7536ebe69227484cb3518e619
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m32.298804214s (build: 21m31.214617064s, test: 6m34.417087923s)
the crash still happens on HEAD
commit msg: Linux 4.14.234
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout