bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on ad61f3714f0a5e8f7ce062d54f310df1f5e0d351
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 106c1e80b075b00cb4333461462cfbb8480d1dfb2798cb24ff3160c214ff9265
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 569d1abf9402e943bf00821a6e0b8e13bffde699
testing commit 569d1abf9402e943bf00821a6e0b8e13bffde699
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0abb2bcf817873a68883e8eb72112b76bd89ed65b7ebb827777ac60eda9d6836
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 31m34.77029751s (build: 16m3.165670455s, test: 15m3.446760429s)
the crash still happens on HEAD
commit msg: Linux 4.14.278
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout