bisecting fixing commit since 78d697fc93f98054e36a3ab76dca1a88802ba7be
building syzkaller on b655d91b8cb3b60be16c940d7bf4b192c2624a7b
testing commit 78d697fc93f98054e36a3ab76dca1a88802ba7be with gcc (GCC) 8.4.1 20210217
kernel signature: 78c5a5411a1116fe4fc08c4e8557585ec365eaf9e00d8f5352043428f4719b5d
all runs: crashed: possible deadlock in uart_write
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: 6a67b85998b605730e41bbffecb646610ec13032d3262e619548a25908a81330
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 35m54.83278923s (build: 25m23.048513096s, test: 9m8.460768414s)
the crash still happens on HEAD
commit msg: Linux 4.14.237
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1