bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on 52e3731913ab2677be27c29ed8142b04e8f28521
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c772e6245322a74d26ff70fc838f9aced02d7daa67cd7f51c597ee16b954c97e
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 __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 __blkdev_get
run #11: OK
run #12: OK
run #13: crashed: INFO: task hung in truncate_inode_pages_range
run #14: crashed: INFO: task hung in truncate_inode_pages_range
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing current HEAD 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
testing commit 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 52446ad5a76d4e4a24d85beb853addd71d21def2a1ebc8de7f1e2c63c70ff3ab
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 32m33.285785895s (build: 17m8.734834933s, test: 14m26.024464775s)
the crash still happens on HEAD
commit msg: Linux 4.14.281
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