bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on b3c3bb8e115e28ac78d37da1ee8931351d6cb113
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 with gcc (GCC) 8.4.1 20210217
kernel signature: d6b034fb4244668cbcbecd691f38f10df8474739f92942c3350f5a1918197c43
run #0: crashed: possible deadlock in iterate_dir
run #1: crashed: possible deadlock in iterate_dir
run #2: crashed: possible deadlock in mnt_want_write
run #3: crashed: possible deadlock in iterate_dir
run #4: crashed: possible deadlock in iterate_dir
run #5: crashed: possible deadlock in iterate_dir
run #6: crashed: possible deadlock in mnt_want_write
run #7: crashed: possible deadlock in iterate_dir
run #8: crashed: possible deadlock in mnt_want_write
run #9: crashed: possible deadlock in mnt_want_write
run #10: crashed: possible deadlock in iterate_dir
run #11: crashed: possible deadlock in mnt_want_write
run #12: crashed: possible deadlock in mnt_want_write
run #13: crashed: possible deadlock in mnt_want_write
run #14: crashed: possible deadlock in iterate_dir
run #15: crashed: possible deadlock in mnt_want_write
run #16: crashed: possible deadlock in iterate_dir
run #17: crashed: possible deadlock in iterate_dir
run #18: crashed: possible deadlock in iterate_dir
run #19: crashed: possible deadlock in iterate_dir
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: c69608ba89174a3f6e9dd746e3b88aae7ee39cc046b82734a46dbf51483254b4
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m7.397970516s (build: 19m58.729837525s, test: 6m44.46498387s)
the crash still happens on HEAD
commit msg: Linux 4.14.237
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout