bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694
building syzkaller on c0ced5570c6505a80235b64884c93e89733b77f3
testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 with gcc (GCC) 8.4.1 20210217
kernel signature: 95c7109091c20ff6738c565bd9e41e770f6590f3747b55e249702b54af49a546
run #0: crashed: BUG: soft lockup in hci_sock_release
run #1: crashed: BUG: soft lockup in hci_sock_release
run #2: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #3: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #4: crashed: BUG: soft lockup in hci_sock_release
run #5: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #6: crashed: BUG: soft lockup in hci_sock_release
run #7: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #8: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #9: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #10: crashed: BUG: soft lockup in hci_sock_release
run #11: crashed: BUG: soft lockup in hci_sock_release
run #12: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #13: crashed: BUG: soft lockup in hci_sock_release
run #14: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #15: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #16: crashed: BUG: soft lockup in hci_sock_release
run #17: crashed: BUG: soft lockup in hci_sock_release
run #18: crashed: BUG: soft lockup in mgmt_set_connectable_complete
run #19: crashed: BUG: soft lockup in hci_sock_release
testing current HEAD 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
testing commit 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85 with gcc (GCC) 8.4.1 20210217
kernel signature: a96869d1947efa2ecd022020c99475f6013424d6d4aa3aca9decfed3dc25a499
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m6.178683583s (build: 19m33.67375073s, test: 7m3.961018638s)
the crash still happens on HEAD
commit msg: Linux 4.14.236
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1