bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207 building syzkaller on ad61f3714f0a5e8f7ce062d54f310df1f5e0d351 testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 18787d4630af9ceed80e9ebefa78db456af0bfcc52d0c84349248c749e317dff run #0: crashed: SYZFAIL: mmap of input file failed run #1: crashed: SYZFAIL: mmap of input file failed run #2: crashed: SYZFAIL: mmap of input file failed run #3: crashed: SYZFAIL: mmap of input file failed run #4: crashed: SYZFAIL: mmap of input file failed run #5: crashed: SYZFAIL: mmap of input file failed run #6: crashed: SYZFAIL: mmap of input file failed run #7: crashed: SYZFAIL: mmap of input file failed run #8: OK run #9: crashed: SYZFAIL: mmap of input file failed run #10: OK run #11: OK run #12: OK run #13: OK run #14: OK run #15: crashed: SYZFAIL: mmap of input file failed run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD 9dfbac0e6b8600043de8dc85ed072f5f1342dc15 testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: aaaf3207f7fe7640bee24735a29a644d9749929b51b0ac6738c1e6b545149017 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m54.950959959s (build: 14m36.272173705s, test: 11m54.578378331s) the crash still happens on HEAD commit msg: Linux 4.14.258 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout