bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on 6bfdbe8950b22b1c832478bd397754f3108df040
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0ca95f5097953367f1f0bbcdfdfe1bb924b2c8258ffef3482a3c3c2a1c436e02
all runs: crashed: KASAN: use-after-free Read in hci_chan_del
testing current HEAD e3a56aaade89bc89f33baec11b12538fc22536e2
testing commit e3a56aaade89bc89f33baec11b12538fc22536e2
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fa21896ba2987915bd056cbca84daf6f29ff5a7ca2fc08f705cc7586d3779d75
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m42.503659713s (build: 14m50.542784988s, test: 6m19.598729786s)
the crash still happens on HEAD
commit msg: Linux 4.14.277
crash: unregister_netdevice: waiting for DEV to become free
IPVS: ftp: loaded support on port[0] = 21
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
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