bisecting fixing commit since a844dc4c544291470aa69edbe2434b040794e269
building syzkaller on 1508f45368a309a3b1196a342b3d64ce7be4cc43
testing commit a844dc4c544291470aa69edbe2434b040794e269
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 52ee918f8f4c5c297f5a9a5ce0735653976b17a8064d72b742fbc06b655385b7
run #0: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #1: crashed: BUG: unable to handle kernel NULL pointer dereference in corrupted
run #2: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #3: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #4: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #5: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #6: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #7: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #8: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #9: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #10: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #11: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #12: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #13: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #14: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #15: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #16: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #17: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #18: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
run #19: crashed: KASAN: null-ptr-deref Read in llcp_sock_getname
testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: bbf2892c863a4247d77de4c0ef0ac7c6231943d282b47109388f33b0e29e6745
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m26.743836723s (build: 21m18.262880552s, test: 6m13.685833053s)
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