bisecting fixing commit since 47cbf4cc32db62f053c4cd04fc6ee39a0218139e
building syzkaller on 99917735b6a974a09d3833c34b3d4a8b8198522d
testing commit 47cbf4cc32db62f053c4cd04fc6ee39a0218139e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f8a50dfa7443641abc198ce0517db0b62a557b8fc3dd96cc6df9f4a5b43ac9ff
run #0: crashed: possible deadlock in mnt_want_write
run #1: crashed: possible deadlock in mnt_want_write
run #2: crashed: possible deadlock in mnt_want_write
run #3: crashed: possible deadlock in lookup_slow
run #4: crashed: possible deadlock in mnt_want_write
run #5: crashed: possible deadlock in mnt_want_write
run #6: crashed: possible deadlock in mnt_want_write
run #7: crashed: possible deadlock in mnt_want_write
run #8: crashed: possible deadlock in mnt_want_write
run #9: crashed: possible deadlock in mnt_want_write
run #10: crashed: possible deadlock in mnt_want_write
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 mnt_want_write
run #15: crashed: possible deadlock in mnt_want_write
run #16: crashed: possible deadlock in mnt_want_write
run #17: crashed: possible deadlock in mnt_want_write
run #18: crashed: possible deadlock in mnt_want_write
run #19: crashed: possible deadlock in mnt_want_write
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0682a73a7122264b3fcee06bdc69feeefb0cd6d5c7976f8ec8f16b59776b3345
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m9.706946351s (build: 21m53.641347819s, test: 6m33.708609024s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 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: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout