bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on 6bfdbe8950b22b1c832478bd397754f3108df040
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f247b7031e1de12beb391206088f0a11329b8258feca810c59fc210ef6914884
all runs: crashed: KASAN: use-after-free Read in hci_chan_del
testing current HEAD 1048779a1d7dcf0b5c150188decafa21c19821e4
testing commit 1048779a1d7dcf0b5c150188decafa21c19821e4
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1f6dea17b84f7e14b98e58d5e0006a7d7f171c9d553b1aa9d655d7c2a825217a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m36.450585349s (build: 16m30.015031533s, test: 6m35.402219285s)
the crash still happens on HEAD
commit msg: Linux 4.14.287
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