bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on 52e3731913ab2677be27c29ed8142b04e8f28521
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: e4488581b67872dadf86f73a6046bdef13ba5d44696b2b7f2c91e59b75a84dd7
run #0: OK
run #1: crashed: INFO: task hung in truncate_inode_pages_range
run #2: crashed: INFO: task hung in __blkdev_get
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 __blkdev_get
run #7: crashed: INFO: task hung in __blkdev_get
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: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing current HEAD f051383ef03bde49ca992f297ec80757a702e774
testing commit f051383ef03bde49ca992f297ec80757a702e774
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 87c9def3169b47d2b68e4689ddf8fdb774af8f41708d430de103d8ad0a8ac683
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m26.171526123s (build: 12m19.39985908s, test: 14m42.267346163s)
the crash still happens on HEAD
commit msg: Linux 4.14.285
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout