bisecting fixing commit since 78d697fc93f98054e36a3ab76dca1a88802ba7be
building syzkaller on b655d91b8cb3b60be16c940d7bf4b192c2624a7b
testing commit 78d697fc93f98054e36a3ab76dca1a88802ba7be
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fd63e04eebd4189478cefe6721cde64e3755b9fc62c22fa508acc13ae85ef52f
all runs: crashed: possible deadlock in uart_write
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: e6c226f1635ddc408ebe7146f90dbd4262edd7ec1214761214a6b3e64cd97262
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m16.929803536s (build: 20m56.396183357s, test: 6m17.795766658s)
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