bisecting fixing commit since 21ad423fe5210f5aa50bd43f9ae99b655090a227
building syzkaller on 0b33604d8e2793b82ec89abecf82d92b82e3d410
testing commit 21ad423fe5210f5aa50bd43f9ae99b655090a227
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2b37d1a034e4c6525f6143ab91f01b7590a7a100363c64b8edb5ceb528e47e56
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
testing commit 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f00e2b221e02a4e8333745ef335ffbbc33232c4e70757828ac8d9533de9c4e44
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m58.239787579s (build: 14m49.499271117s, test: 6m35.759320324s)
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