bisecting fixing commit since a844dc4c544291470aa69edbe2434b040794e269
building syzkaller on 1508f45368a309a3b1196a342b3d64ce7be4cc43
testing commit a844dc4c544291470aa69edbe2434b040794e269
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c5c5a3699d0a5ada422f01b454c15cf04bfa4c410b9ae47edce999cc38f8d86e
all runs: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
testing current HEAD c01d4d1b885d96a7c8c27d629abeb918ca897dbe
testing commit c01d4d1b885d96a7c8c27d629abeb918ca897dbe
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: c54f8fca612045ec3746c0ad9dbbb4bfe0d8004df314762689d06a7d7a45e5dc
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m25.010152162s (build: 19m5.914271237s, test: 6m30.103147138s)
the crash still happens on HEAD
commit msg: Linux 4.14.257
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1