bisecting fixing commit since c10b57a567e4333b9fdf60b5ec36de9859263ca2
building syzkaller on 365fba2440cee3aed74c774867a1f43e3e2f7aac
testing commit c10b57a567e4333b9fdf60b5ec36de9859263ca2
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ce7d4d798e412ea02b7aaa24cb078205e65efe1172a19e921df3f55e0b028b9b
all runs: crashed: possible deadlock in perf_event_read_value
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f437ab36f99a1f50d6bee23d2673c4cdbe8a0cecf9afc7fc162d912ae1dc503d
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m42.729327561s (build: 16m27.022821115s, test: 6m41.246468164s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1