bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on ad61f3714f0a5e8f7ce062d54f310df1f5e0d351
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7a28835d9bb50bb4005c0ff267a735696228971b613ffb08fd0c8096f7561bc3
run #0: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #1: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #2: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #3: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #4: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #5: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #6: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #7: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #8: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #9: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #10: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #11: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #12: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #13: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #14: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #15: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #16: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #17: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #18: crashed: KASAN: use-after-free Read in nfc_llcp_sock_unlink
run #19: OK
testing current HEAD 5f9f3b0057d5c5782985784ba0159b05b4083055
testing commit 5f9f3b0057d5c5782985784ba0159b05b4083055
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4447e4d0286d6bb6e733da5bd665ce31ecda37d41bc46d2b2c7f0afbe99c8205
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m30.457265073s (build: 14m42.895397054s, test: 14m23.414042895s)
the crash still happens on HEAD
commit msg: Linux 4.14.255
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout