bisecting fixing commit since 98db2bf27b9ed2d5ed0b6c9c8a4bfcb127a19796
building syzkaller on 251aabb77ec4d86b9374b6f999fbb8e1ea70963f
testing commit 98db2bf27b9ed2d5ed0b6c9c8a4bfcb127a19796
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8458aa3b974fbf78b411525a54d9078ca771649a2760a2d0d4b0c84f6af03936
all runs: crashed: WARNING: ODEBUG bug in free_tcf
testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6
testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f9007eb873d112c8d16aebac9dc7cd8525f28be76964717db612ee80ae28fd7c
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m28.910537574s (build: 15m58.568075458s, test: 6m6.983829468s)
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