bisecting fixing commit since 78d697fc93f98054e36a3ab76dca1a88802ba7be
building syzkaller on b655d91b8cb3b60be16c940d7bf4b192c2624a7b
testing commit 78d697fc93f98054e36a3ab76dca1a88802ba7be
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 029ad8473339485cf7d47d1be618b0d38edeeec72755965a5f12483efdc30a3b
all runs: crashed: possible deadlock in uart_write
testing current HEAD 5f9f3b0057d5c5782985784ba0159b05b4083055
testing commit 5f9f3b0057d5c5782985784ba0159b05b4083055
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d33eb656f365a0d1fe14c731920d9d5f720a8979de784f14a35cc1afd42a544e
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m51.855473649s (build: 15m9.901329391s, test: 9m49.070798954s)
the crash still happens on HEAD
commit msg: Linux 4.14.255
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1