bisecting fixing commit since a844dc4c544291470aa69edbe2434b040794e269
building syzkaller on 1508f45368a309a3b1196a342b3d64ce7be4cc43
testing commit a844dc4c544291470aa69edbe2434b040794e269
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4ed31d343d6868b0aa5ec6969580d29b63491e74bcd0059e3ba0732ebaff8912
all runs: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
testing current HEAD ed99bf0e81b558df39f7db2fa96d0228be4198c6
testing commit ed99bf0e81b558df39f7db2fa96d0228be4198c6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 70cca5f98cbe10b6f59554dc230a83798860104d9cdd50d24a093db756c752d3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m40.099608323s (build: 22m45.607571631s, test: 6m34.596080612s)
the crash still happens on HEAD
commit msg: Linux 4.14.250
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1