bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on ad61f3714f0a5e8f7ce062d54f310df1f5e0d351
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4ba2cfdc4add4f4e1ac323aaa52ece6a284f71667fd61b2c99101337e04635bf
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 ed99bf0e81b558df39f7db2fa96d0228be4198c6
testing commit ed99bf0e81b558df39f7db2fa96d0228be4198c6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fba5042f8e8e831298b89d9ec8952342df8cc741ff285c1cfe56cca833c90d81
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 35m44.631774551s (build: 20m46.086801545s, test: 14m22.280178418s)
the crash still happens on HEAD
commit msg: Linux 4.14.250
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout