bisecting fixing commit since 397a88b2cc869c823bf40bc403d36a62afec1edd building syzkaller on e4b4d570a88c0d2e0420c6e21fc20d90564636b1 testing commit 397a88b2cc869c823bf40bc403d36a62afec1edd compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 0f872d5466e3edb6a3a5e45862224f02a7e633982994c8da25d8f4b310a31ed7 run #0: crashed: KASAN: use-after-free Read in rht_deferred_worker run #1: crashed: KASAN: use-after-free Read in rht_deferred_worker run #2: crashed: KASAN: use-after-free Read in rht_deferred_worker run #3: crashed: KASAN: use-after-free Read in rht_deferred_worker run #4: crashed: KASAN: use-after-free Read in rht_deferred_worker run #5: OK run #6: OK run #7: OK run #8: crashed: KASAN: use-after-free Read in rht_deferred_worker run #9: crashed: KASAN: use-after-free Read in rht_deferred_worker run #10: crashed: KASAN: use-after-free Read in rht_deferred_worker run #11: crashed: KASAN: use-after-free Read in rht_deferred_worker run #12: OK run #13: OK run #14: crashed: KASAN: use-after-free Read in rht_deferred_worker run #15: OK run #16: OK run #17: OK run #18: OK run #19: OK testing current HEAD 94cb1fed447ac8d328a8b50f9583df4ce70793e2 testing commit 94cb1fed447ac8d328a8b50f9583df4ce70793e2 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: c8057cb1c28b9632ee63ec2effe6b9bd2a617382cdf11114034f0e9d982fbf3b all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 31m58.066905118s (build: 16m45.713185049s, test: 14m41.22286883s) the crash still happens on HEAD commit msg: Linux 4.14.242 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout