bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on 340ea5301c27db4a3678f13acc430e04706a0cc6
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 577d2d7de51b8905149abffc67d2a11e90e0bf965293b7f927082132e88300f0
all runs: crashed: divide error in fbcon_switch
testing current HEAD 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
testing commit 8ea4f73cfa7e0555dc03aedde52db54a6587ab43
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d683390e4bcd199dd3dd6a846663f257a211f5662e709cfe00785f0fa5524ce7
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m52.58853506s (build: 19m28.581522222s, test: 7m51.154301948s)
the crash still happens on HEAD
commit msg: Linux 4.14.247
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1