bisecting fixing commit since 1752938529c614a8ed4432ecce6ebc95d3b87207
building syzkaller on c104d4a3bfc1f83e7ed33b4dca70e099402ce39f
testing commit 1752938529c614a8ed4432ecce6ebc95d3b87207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 21e844bfeb48ad3ba95d4d2f760f455072cf89e51f33e6d59487f234e4327afc
all runs: crashed: INFO: task hung in sync_inodes_sb
testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a3e1e82b18cc132d9dad5a04dfe1b3cfeb13ee331d737e2117f7785e9d94bfbb
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m35.471633961s (build: 20m0.389210015s, test: 10m5.657873653s)
the crash still happens on HEAD
commit msg: Linux 4.14.280
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