bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on cb93dc6ac64225e09f44bac6c6cce1dae1b248b0
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4519fd4e7100d3e3106ff836860668af359a03b189ffd595370617981e7fd4b9
all runs: crashed: BUG: unable to handle kernel paging request in vga16fb_fillrect
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: e1efc0a9fea5742d0595a207bd137f06b1760f21964f83babadc432ed8c98ad2
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m3.386630838s (build: 21m55.136386088s, test: 6m21.534507052s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1