bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 805b5003de8c474f5d317a67f739597ebc78fcca testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 4553cac0df3e72dc94ac6573dc8df367a9f03da339d29ac2f33953dc0ff24d0e all runs: crashed: possible deadlock in sk_clone_lock testing current HEAD f051383ef03bde49ca992f297ec80757a702e774 testing commit f051383ef03bde49ca992f297ec80757a702e774 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: eedc03a5837a9a18290495926665448e8250e4fe466ac5dfda84461fc29ecfb1 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 20m56.812460846s (build: 13m59.257104266s, test: 6m32.333792115s) the crash still happens on HEAD commit msg: Linux 4.14.285 crash: unregister_netdevice: waiting for DEV to become free IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready syz-executor.0 (7962) used greatest stack depth: 23976 bytes left 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