bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on cb93dc6ac64225e09f44bac6c6cce1dae1b248b0
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a with gcc (GCC) 8.4.1 20210217
kernel signature: d0b12dabc3f62ba5166d87b82e4e88e54c0ca06c472b9665aff9d5ca87590b20
all runs: crashed: BUG: unable to handle kernel paging request in vga16fb_fillrect
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: e97b5ae815a730c8abf152407c17ead88179e65d5dffdf67b8357aba952196c3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m27.160048459s (build: 16m2.105813876s, test: 5m57.276782416s)
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