bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67
building syzkaller on ff4a3345a1b2a40ff1b8b983153d0b1fcc72f1c5
testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 17ba8b3f8b9e7ef13d6cf384999a2a9f35b6d626889c30fd01ef8ee128e7d66c
all runs: crashed: possible deadlock in perf_event_ctx_lock_nested
testing current HEAD 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
testing commit 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 018736c7b0ae74643cc815b3f882015b048837a9a865de288cc2b79516279bb0
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 34m29.100637903s (build: 27m2.740269346s, test: 6m49.463032533s)
the crash still happens on HEAD
commit msg: Linux 4.14.284
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
random: crng init done
random: 7 urandom warning(s) missed due to ratelimiting