bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae
building syzkaller on bca53db974f570410921f59b8c2c59a3d263cb44
testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: cf43a3d9c5c0687c463b248edb70c4ef46962a7aeb720e027d9ec3aa4487cbbc
run #0: crashed: WARNING in md_ioctl
run #1: crashed: WARNING in md_ioctl
run #2: crashed: WARNING in md_ioctl
run #3: crashed: WARNING in md_ioctl
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: KASAN: use-after-free Read in disk_unblock_events
run #11: crashed: KASAN: use-after-free Read in disk_unblock_events
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: WARNING in md_ioctl
testing current HEAD 5f9f3b0057d5c5782985784ba0159b05b4083055
testing commit 5f9f3b0057d5c5782985784ba0159b05b4083055
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 80ad999c573ae6db08346fd8a09dcfdc5efbecae6cf59599ebc934e64b31c13f
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m7.273964334s (build: 14m9.095328176s, test: 6m35.695596341s)
the crash still happens on HEAD
commit msg: Linux 4.14.255
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout