bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on 52e3731913ab2677be27c29ed8142b04e8f28521
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8 with gcc (GCC) 8.4.1 20210217
kernel signature: 06dd031fafd6fd510ec3e030343c3c0381ad4bc2c3255a2ab0f12bfd0eee1fec
run #0: crashed: INFO: task hung in truncate_inode_pages_range
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 __blkdev_get
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 96afcb20f36f07683aaa342e592ea8ec76fd1fa6
testing commit 96afcb20f36f07683aaa342e592ea8ec76fd1fa6 with gcc (GCC) 8.4.1 20210217
kernel signature: ee88a3168ca2bbc76e74afe05e7d3689a2f024b334f99e6fa342296fe496d886
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m58.081690587s (build: 15m16.16408135s, test: 12m15.054830211s)
the crash still happens on HEAD
commit msg: Linux 4.14.233
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x041b tx timeout
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: hci4 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 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci5 command 0x0419 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