bisecting fixing commit since b850307b279cbd12ab8c654d1a3dfe55319cc475
building syzkaller on f30c14bfec4b49e528a756b28cc010925e2f286b
testing commit b850307b279cbd12ab8c654d1a3dfe55319cc475
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 20ee5f10dedf1c14f6f1b014f4286fe2aac22baf1415d9c0d3c4daa934e972bb
all runs: crashed: possible deadlock in do_io_accounting
testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6
testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 488df8c4ca924dfe456e43290eed7ef1b4652efbf434b805ca431cdc041e8cef
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m59.646854349s (build: 17m35.56443325s, test: 7m58.755079806s)
the crash still happens on HEAD
commit msg: Linux 4.14.256
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1