Warning: Permanently added '10.128.0.180' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.468284] ------------[ cut here ]------------ [ 38.473270] WARNING: CPU: 0 PID: 2073 at net/packet/af_packet.c:4167 packet_set_ring+0x13f1/0x1940() [ 38.482649] Tx-ring is not supported. [ 38.486510] Kernel panic - not syncing: panic_on_warn set ... [ 38.486510] [ 38.493856] CPU: 0 PID: 2073 Comm: syz-executor560 Not tainted 4.4.174+ #4 [ 38.500847] 0000000000000000 662fadf8c251d606 ffff8801d45b7988 ffffffff81aad1a1 [ 38.508874] ffff8801d45b7ad8 ffffffff82835ee0 ffffffff82ab2b80 0000000000001047 [ 38.516888] ffffffff826d3941 ffff8801d45b7a68 ffffffff813a48c2 0000000041b58ab3 [ 38.524891] Call Trace: [ 38.527467] [] dump_stack+0xc1/0x120 [ 38.532876] [] ? packet_set_ring+0x13f1/0x1940 [ 38.539174] [] panic+0x1b9/0x37b [ 38.544183] [] ? add_taint.cold+0x16/0x16 [ 38.549957] [] ? vprintk_emit+0x248/0x820 [ 38.555757] [] ? warn_slowpath_common.cold+0x5/0x20 [ 38.562474] [] warn_slowpath_common.cold+0x20/0x20 [ 38.569078] [] warn_slowpath_fmt+0xbf/0x100 [ 38.575030] [] ? warn_slowpath_common+0x120/0x120 [ 38.581510] [] ? trace_hardirqs_on+0x10/0x10 [ 38.587556] [] packet_set_ring+0x13f1/0x1940 [ 38.593598] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 38.600331] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 38.607151] [] ? tpacket_destruct_skb+0x510/0x510 [ 38.613621] [] ? check_stack_object+0x114/0x160 [ 38.619913] [] ? __check_object_size+0x222/0x332 [ 38.626293] [] packet_setsockopt+0x2af/0x26c0 [ 38.632484] [] ? sock_has_perm+0x2a8/0x400 [ 38.638450] [] ? sock_has_perm+0xa6/0x400 [ 38.644247] [] ? packet_release+0xba0/0xba0 [ 38.650216] [] ? handle_mm_fault+0x98d/0x3140 [ 38.656346] [] ? __fd_install+0x25b/0x640 [ 38.662124] [] ? get_unused_fd_flags+0xd0/0xd0 [ 38.668337] [] ? selinux_socket_setsockopt+0x3f/0x50 [ 38.675076] [] ? security_socket_setsockopt+0x8f/0xc0 [ 38.681905] [] SyS_setsockopt+0x159/0x240 [ 38.687859] [] ? SyS_recv+0x40/0x40 [ 38.693213] [] ? retint_user+0x18/0x3c [ 38.698750] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 38.705235] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 38.712207] Kernel Offset: disabled [ 38.715841] Rebooting in 86400 seconds..