bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on ff4a3345a1b2a40ff1b8b983153d0b1fcc72f1c5
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7f2e4445ac5e1b13c9c3733478d6980eedffb890a5228ade97bd5daabc9bcc83
all runs: crashed: possible deadlock in perf_event_ctx_lock_nested
testing current HEAD 424a46ea058e160ae6fdd0693092ba79da533f26
testing commit 424a46ea058e160ae6fdd0693092ba79da533f26
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1c510724a73f2a23e1d7583abd722a0eaf201d00e5c353c5efb82a784fbd1e5b
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m28.000053432s (build: 23m19.81726107s, test: 6m17.813707979s)
the crash still happens on HEAD
commit msg: Linux 4.14.288
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout