bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on 93f844de48fff3f13271ec9e3fc2f5abf7692424 testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: e1f25c5de79fda8ccab18edc1dc7fd6b353071bcca36c2ee42b530ca81e1598d all runs: crashed: SYZFAIL: mmap of output file failed testing current HEAD 569d1abf9402e943bf00821a6e0b8e13bffde699 testing commit 569d1abf9402e943bf00821a6e0b8e13bffde699 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 0a6b3aa629ca9a3a6830ecd9b40b3d723f91d11f46875da52b8074aee165091e all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 28m23.563869558s (build: 20m50.291851756s, test: 6m51.85496667s) the crash still happens on HEAD commit msg: Linux 4.14.278 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