bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on be6b1582e9ce6f1ac5d8978e70a6a9f91113f238
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 84a0f3b5da28352dcc78b189cae532cb3a2693b709324598b88dbe253ef53b69
run #0: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #2: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #3: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #4: crashed: BUG: sleeping function called from invalid context in __do_page_fault
run #5: crashed: BUG: sleeping function called from invalid context in __do_page_fault
run #6: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #7: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #8: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #9: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #10: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #11: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #12: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #13: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #14: crashed: BUG: sleeping function called from invalid context in __do_page_fault
run #15: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #16: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #17: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #18: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #19: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1b6f5e081940e46cea8f6948f7403192d549e390fd9561607400dce5ac2c761c
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m15.870274054s (build: 20m2.288392145s, test: 6m26.064223754s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout