bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on 340ea5301c27db4a3678f13acc430e04706a0cc6
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 504a82cf23d8b5216432d7e468d740f4618e30fd31b602bf2589445df039a73e
all runs: crashed: divide error in fbcon_switch
testing current HEAD 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
testing commit 501eec4f9e138b958fc7438e7a745c0d6a7c68b3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ab4fc6b914b1b8f2f1ba6320a8a74006165e6af945085256de631d0dcdef1d08
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m20.281957774s (build: 15m27.345386217s, test: 6m26.581634824s)
the crash still happens on HEAD
commit msg: Linux 4.14.281
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1