bisecting fixing commit since 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
building syzkaller on 131df97d431404458e805009bda794abfb00f45f
testing commit 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2d0d0edb2ad392a937903a179d7d246d83e931da5563a30dbac2aad2c984d8bb
run #0: crashed: unregister_netdevice: waiting for DEV to become free
run #1: crashed: unregister_netdevice: waiting for DEV to become free
run #2: crashed: unregister_netdevice: waiting for DEV to become free
run #3: crashed: unregister_netdevice: waiting for DEV to become free
run #4: crashed: unregister_netdevice: waiting for DEV to become free
run #5: crashed: unregister_netdevice: waiting for DEV to become free
run #6: crashed: unregister_netdevice: waiting for DEV to become free
run #7: crashed: unregister_netdevice: waiting for DEV to become free
run #8: crashed: unregister_netdevice: waiting for DEV to become free
run #9: crashed: unregister_netdevice: waiting for DEV to become free
run #10: crashed: unregister_netdevice: waiting for DEV to become free
run #11: crashed: unregister_netdevice: waiting for DEV to become free
run #12: crashed: unregister_netdevice: waiting for DEV to become free
run #13: crashed: unregister_netdevice: waiting for DEV to become free
run #14: crashed: unregister_netdevice: waiting for DEV to become free
run #15: crashed: unregister_netdevice: waiting for DEV to become free
run #16: boot failed: can't ssh into the instance
run #17: boot failed: can't ssh into the instance
run #18: boot failed: can't ssh into the instance
run #19: boot failed: can't ssh into the instance
testing current HEAD 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
testing commit 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 43edfaba6c3b0aab94b98d274051817a28daedc56b16013f72cb32ab294cfd2b
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m57.899150744s (build: 15m43.584537203s, test: 13m51.541187552s)
the crash still happens on HEAD
commit msg: Linux 4.14.281
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout