bisecting fixing commit since b850307b279cbd12ab8c654d1a3dfe55319cc475
building syzkaller on f30c14bfec4b49e528a756b28cc010925e2f286b
testing commit b850307b279cbd12ab8c654d1a3dfe55319cc475
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 031deff44fe0145d69791fd558891a8bfea18aa3965603f8adcef8af0e0b9d75
all runs: crashed: possible deadlock in do_io_accounting
testing current HEAD 8ee0807eedf3bc60c8a47a7dd95387102bcfd063
testing commit 8ee0807eedf3bc60c8a47a7dd95387102bcfd063
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 5133f7f8fb44bc9245d64cffc21eee90a6a5db9cc92eecb652d8426e57558a37
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 32m11.496585988s (build: 24m10.606012804s, test: 7m17.215770699s)
the crash still happens on HEAD
commit msg: Linux 4.14.259
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1