bisecting fixing commit since c01d4d1b885d96a7c8c27d629abeb918ca897dbe
building syzkaller on 49ca1f59e37fcf63dc38a6bd2b60fcc47a0a708e
testing commit c01d4d1b885d96a7c8c27d629abeb918ca897dbe
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: adae06c7e2f43684cfbeca89cb33aecd0be02566e12e0665a9d9c23b7fceeeb3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD bfdef05c8da46b022172695aa493cff7ac667a4b
testing commit bfdef05c8da46b022172695aa493cff7ac667a4b
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a57081dfac60bb22be8193f1fd4e3bed36ecf0c4a1e59c4127587813f56b15ba
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m46.59554673s (build: 18m26.859322709s, test: 6m54.262109919s)
the crash still happens on HEAD
commit msg: Linux 4.14.261
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1