bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on 52e3731913ab2677be27c29ed8142b04e8f28521
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8d32e8ad5aa44a72a31d15d2ca467b301f0e7e1caf2da9f0c7d89625c9e2c5da
run #0: crashed: INFO: task hung in blkdev_put
run #1: crashed: INFO: task hung in blkdev_put
run #2: crashed: INFO: task hung in truncate_inode_pages_range
run #3: crashed: INFO: task hung in truncate_inode_pages_range
run #4: crashed: INFO: task hung in truncate_inode_pages_range
run #5: crashed: INFO: task hung in truncate_inode_pages_range
run #6: crashed: INFO: task hung in truncate_inode_pages_range
run #7: crashed: INFO: task hung in truncate_inode_pages_range
run #8: crashed: INFO: task hung in truncate_inode_pages_range
run #9: crashed: INFO: task hung in truncate_inode_pages_range
run #10: crashed: INFO: task hung in truncate_inode_pages_range
run #11: crashed: INFO: task hung in truncate_inode_pages_range
run #12: crashed: INFO: task hung in truncate_inode_pages_range
run #13: crashed: INFO: task hung in truncate_inode_pages_range
run #14: crashed: INFO: task hung in truncate_inode_pages_range
run #15: crashed: INFO: task hung in truncate_inode_pages_range
run #16: crashed: INFO: task hung in truncate_inode_pages_range
run #17: crashed: INFO: task hung in truncate_inode_pages_range
run #18: crashed: INFO: task hung in truncate_inode_pages_range
run #19: crashed: INFO: task hung in truncate_inode_pages_range
testing current HEAD 8ee0807eedf3bc60c8a47a7dd95387102bcfd063
testing commit 8ee0807eedf3bc60c8a47a7dd95387102bcfd063
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3af99e2cab4e99fe2bcea81cd3119e66661f1668c77eef1604d29ed55b25d7fc
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 34m17.498830462s (build: 20m20.269991952s, test: 13m23.885671527s)
the crash still happens on HEAD
commit msg: Linux 4.14.259
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 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: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout