bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae
building syzkaller on c2c1d1dd603b7d66d283253ffbd61b8692712bd2
testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b2ad4772c45627278f0349dd9f8d5ef3a2455aba027b2eccfd8a0a41925d08c7
run #0: crashed: possible deadlock in sk_clone_lock
run #1: crashed: inconsistent lock state in free_huge_page
run #2: crashed: possible deadlock in sk_clone_lock
run #3: crashed: possible deadlock in sk_clone_lock
run #4: crashed: possible deadlock in sk_clone_lock
run #5: crashed: possible deadlock in sk_clone_lock
run #6: crashed: possible deadlock in sk_clone_lock
run #7: crashed: possible deadlock in sk_clone_lock
run #8: crashed: possible deadlock in sk_clone_lock
run #9: crashed: possible deadlock in sk_clone_lock
run #10: crashed: possible deadlock in sk_clone_lock
run #11: crashed: possible deadlock in sk_clone_lock
run #12: crashed: possible deadlock in sk_clone_lock
run #13: crashed: possible deadlock in sk_clone_lock
run #14: crashed: possible deadlock in sk_clone_lock
run #15: crashed: possible deadlock in sk_clone_lock
run #16: crashed: possible deadlock in sk_clone_lock
run #17: crashed: possible deadlock in sk_clone_lock
run #18: crashed: possible deadlock in sk_clone_lock
run #19: crashed: possible deadlock in sk_clone_lock
testing current HEAD 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
testing commit 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: dc52ff011ca6c71b719a123bc20a98d758b702c88ef2fc7e6945a570421e3c33
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 31m47.254530102s (build: 17m13.266304723s, test: 14m5.196297608s)
the crash still happens on HEAD
commit msg: Linux 4.14.284
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