bisecting fixing commit since 8961076ed318dfd22aa357b41589f07bf67e73b6
building syzkaller on 0767f13fbd87c99aea7893eb64199b76be42cd61
testing commit 8961076ed318dfd22aa357b41589f07bf67e73b6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 6485c80def7be867f327693615a5f75e65f5cce43a42c2fd137899cdd132232f
run #0: crashed: possible deadlock in strp_sock_lock
run #1: crashed: possible deadlock in kcm_ioctl
run #2: crashed: possible deadlock in strp_sock_lock
run #3: crashed: possible deadlock in kcm_ioctl
run #4: crashed: possible deadlock in kcm_ioctl
run #5: crashed: possible deadlock in strp_sock_lock
run #6: crashed: possible deadlock in strp_sock_lock
run #7: crashed: possible deadlock in kcm_ioctl
run #8: crashed: possible deadlock in strp_sock_lock
run #9: crashed: possible deadlock in kcm_ioctl
run #10: crashed: possible deadlock in strp_sock_lock
run #11: crashed: possible deadlock in kcm_ioctl
run #12: crashed: possible deadlock in kcm_ioctl
run #13: crashed: possible deadlock in kcm_ioctl
run #14: crashed: possible deadlock in kcm_ioctl
run #15: crashed: possible deadlock in strp_sock_lock
run #16: crashed: possible deadlock in strp_sock_lock
run #17: crashed: possible deadlock in kcm_ioctl
run #18: crashed: possible deadlock in kcm_ioctl
run #19: crashed: possible deadlock in kcm_ioctl
testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6
testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a74f3ca7c5d1d3e9293e8b599a9949bacb03e46a29cfa44e69f21ce1aa0592d1
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m21.547408506s (build: 14m58.892277896s, test: 6m51.598757328s)
the crash still happens on HEAD
commit msg: Linux 4.14.256
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout