bisecting fixing commit since 43598c571e7ed29e4c81e35b4a870fe6b9f8d58e
building syzkaller on 4f7e1d0f5e1c44e2298738f690dde25c486cc65a
testing commit 43598c571e7ed29e4c81e35b4a870fe6b9f8d58e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 45ca8b8c0154cad235a244cea89ec69506ca3597a1bfad0f50aa77267330de84
all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in vb2_vmalloc_put
testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 85ef13bb1dc753ef2052e7d92c271a8bc225f77d9fa041b8638a04068535c458
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m55.848545838s (build: 15m52.660445786s, test: 6m22.335331334s)
the crash still happens on HEAD
commit msg: Linux 4.14.246
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1