bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on 52e3731913ab2677be27c29ed8142b04e8f28521
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: bd6ce73373efb256ca045a13882dfdc99a9be6ab6a2a257269f12c6d796075b8
run #0: crashed: INFO: task hung in blkdev_put
run #1: crashed: INFO: task hung in truncate_inode_pages_range
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 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
testing commit 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 5688a4a77f08a95f175200a01d12f72271507b80859082cec7771a25def8aac1
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 31m53.994398187s (build: 18m25.011193766s, test: 12m45.213576181s)
the crash still happens on HEAD
commit msg: Linux 4.14.247
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout