bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on be6b1582e9ce6f1ac5d8978e70a6a9f91113f238
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ad583a5135076a23931f6c62b3089277c46a7b3ca0b398c9e86d896e25503ac8
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: sleeping function called from invalid context in __do_page_fault
run #4: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
run #5: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
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: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
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 f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4b4b875ecc63d1e7e79e9aaf4a408ddf4f26ed5abe36b9f35c1e3a36165a47f8
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m27.905270498s (build: 19m32.464856614s, test: 6m22.384040119s)
the crash still happens on HEAD
commit msg: Linux 4.14.246
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 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: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout