bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on cb93dc6ac64225e09f44bac6c6cce1dae1b248b0
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7999f04e49e94e3de69c76e06aaaad738fb55e1f03c219cf7600667ec6822ab4
all runs: crashed: BUG: unable to handle kernel paging request in vga16fb_fillrect
testing current HEAD 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a4ce5f2862cc91a3ef579c538eea16690b415bfcac646af6ca8962724c9d0247
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m40.605075521s (build: 21m35.376642621s, test: 6m29.132165857s)
the crash still happens on HEAD
commit msg: Linux 4.14.258
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1