bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on ed7d41c582d6f194ff35353d8bfdf7681dc0718e
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: cf13a65cc3c92cb01b7b5dde2a98774b59353637c425cca3eeeb61501fa6ab1e
run #0: crashed: INFO: task hung in blkdev_reread_part
run #1: crashed: INFO: task hung in __blkdev_get
run #2: crashed: INFO: task hung in blkdev_reread_part
run #3: crashed: INFO: task hung in blkdev_reread_part
run #4: crashed: INFO: task hung in blkdev_reread_part
run #5: crashed: INFO: task hung in lo_release
run #6: crashed: INFO: task hung in lo_open
run #7: crashed: INFO: task hung in lo_open
run #8: crashed: INFO: task hung in loop_control_ioctl
run #9: crashed: INFO: task hung in lo_open
run #10: crashed: INFO: task hung in lo_open
run #11: crashed: INFO: task hung in lo_open
run #12: crashed: INFO: task hung in lo_open
run #13: crashed: INFO: task hung in blkdev_reread_part
run #14: crashed: INFO: task hung in lo_open
run #15: crashed: INFO: task hung in lo_open
run #16: crashed: INFO: task hung in lo_open
run #17: crashed: INFO: task hung in lo_open
run #18: crashed: INFO: task hung in lo_open
run #19: crashed: INFO: task hung in lo_open
testing current HEAD ed99bf0e81b558df39f7db2fa96d0228be4198c6
testing commit ed99bf0e81b558df39f7db2fa96d0228be4198c6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ffaeb594243f401fc429c91173ea733660b4d5ab45aa336051c3f63218d62327
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m28.537958859s (build: 14m44.865203053s, test: 10m20.839961049s)
the crash still happens on HEAD
commit msg: Linux 4.14.250
crash: unregister_netdevice: waiting for DEV to become free
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f 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: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout