bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on 340ea5301c27db4a3678f13acc430e04706a0cc6
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: bf71ec87e7b1aea5e7dfb29c1c9324a1ba72c6749d8652c056b192df6a81fec4
all runs: crashed: divide error in fbcon_switch
testing current HEAD 964f3712e6a7447d9d3203f2be3f6c50e78ea179
testing commit 964f3712e6a7447d9d3203f2be3f6c50e78ea179
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8f9ed63efacc34c6ab207a1ad45f6f38fde23438611eef8bda550bb6b3bfbaed
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m51.680435359s (build: 19m12.908540078s, test: 6m10.368260804s)
the crash still happens on HEAD
commit msg: Linux 4.14.240
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1