bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae
building syzkaller on bca53db974f570410921f59b8c2c59a3d263cb44
testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 62f34426f5fdf56a05d1d3a49220d21014029b8ee8ca5755b7f8a6c07cb96e9d
run #0: crashed: KASAN: use-after-free Read in disk_unblock_events
run #1: crashed: WARNING in md_ioctl
run #2: crashed: WARNING in md_ioctl
run #3: crashed: KASAN: use-after-free Read in disk_unblock_events
run #4: crashed: WARNING in md_ioctl
run #5: crashed: KASAN: use-after-free Read in disk_unblock_events
run #6: crashed: WARNING in md_ioctl
run #7: crashed: WARNING in md_ioctl
run #8: crashed: WARNING in md_ioctl
run #9: crashed: WARNING in md_ioctl
run #10: crashed: WARNING in md_ioctl
run #11: crashed: WARNING in md_ioctl
run #12: crashed: WARNING in md_ioctl
run #13: crashed: KASAN: use-after-free Read in disk_unblock_events
run #14: crashed: WARNING in md_ioctl
run #15: crashed: WARNING in md_ioctl
run #16: crashed: WARNING in md_ioctl
run #17: crashed: WARNING in md_ioctl
run #18: crashed: WARNING in md_ioctl
run #19: crashed: KASAN: use-after-free Read in disk_unblock_events
testing current HEAD 964f3712e6a7447d9d3203f2be3f6c50e78ea179
testing commit 964f3712e6a7447d9d3203f2be3f6c50e78ea179
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d1e6c386552de469ced0cb9980657438d171906b5da042076752eeadeb297b34
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m43.706320037s (build: 20m46.026957076s, test: 6m25.327345475s)
the crash still happens on HEAD
commit msg: Linux 4.14.240
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout