bisecting fixing commit since 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
building syzkaller on 44068e196185e2f5a7c94629b6245cdde008b140
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 74a9ddade06f975a70ce952eb976de3ebc757ab7bb663beccc9f185d3b5ec587
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542
testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7ae6d59dda2e5ad05d83cfd12549e0032a35c984b1b21b88e74e1b669db268f0
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m57.445060847s (build: 19m25.178121897s, test: 7m0.749014563s)
the crash still happens on HEAD
commit msg: Linux 4.14.262
crash: unregister_netdevice: waiting for DEV to become free
Buffer I/O error on dev loop1, logical block 0, async page read
ldm_validate_partition_table(): Disk read failed.
Dev loop1: unable to read RDB block 0
 loop1: unable to read partition table
loop1: partition table beyond EOD, truncated
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1