bisecting fixing commit since b86ee2b7ae42b6b37a918b66236608e2cc325f59
building syzkaller on a7dab6385c1d95547a88e22577fb56fbcd5c37eb
testing commit b86ee2b7ae42b6b37a918b66236608e2cc325f59
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 506de7b46b35dbf8439326266a1f59c877a3a4437d14000a880245594e36e116
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 74766a973637a02c32c04c1c6496e114e4855239
testing commit 74766a973637a02c32c04c1c6496e114e4855239
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3b35de7a8c5155097dac2a8f53cca9dcbdf0bbe90e4b0f0f6b007e0b22d344bc
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 21m6.759930581s (build: 14m28.006781726s, test: 6m14.941042498s)
the crash still happens on HEAD
commit msg: Linux 4.14.275
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1