bisecting fixing commit since b850307b279cbd12ab8c654d1a3dfe55319cc475
building syzkaller on f30c14bfec4b49e528a756b28cc010925e2f286b
testing commit b850307b279cbd12ab8c654d1a3dfe55319cc475
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ea17bd7d803c00601a451f9250c41893d4b65b8c8a04de99e4248bfc66fdab2c
all runs: crashed: possible deadlock in do_io_accounting
testing current HEAD bbb957e1bd4a337c0d10d599d284a7475bca47cb
testing commit bbb957e1bd4a337c0d10d599d284a7475bca47cb
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 34c7067b66d0f9a6706a0e368f36944c4a7ccc04cf8789e088a7669d7b891f8a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m54.734611826s (build: 22m3.221162636s, test: 7m18.211208007s)
the crash still happens on HEAD
commit msg: Linux 4.14.263
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1