Warning: Permanently added '10.128.0.207' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.271171] ------------[ cut here ]------------ [ 42.276161] WARNING: CPU: 0 PID: 2076 at net/packet/af_packet.c:4167 packet_set_ring+0x13f1/0x1940() [ 42.285556] Tx-ring is not supported. [ 42.289442] Kernel panic - not syncing: panic_on_warn set ... [ 42.289442] [ 42.296855] CPU: 0 PID: 2076 Comm: syz-executor764 Not tainted 4.4.174+ #4 [ 42.304033] 0000000000000000 70ae5d9f4aa68229 ffff8800b6ecf988 ffffffff81aad1a1 [ 42.312493] ffff8800b6ecfad8 ffffffff82835ee0 ffffffff82ab2b80 0000000000001047 [ 42.320496] ffffffff826d3941 ffff8800b6ecfa68 ffffffff813a48c2 0000000041b58ab3 [ 42.328613] Call Trace: [ 42.331378] [] dump_stack+0xc1/0x120 [ 42.336731] [] ? packet_set_ring+0x13f1/0x1940 [ 42.343062] [] panic+0x1b9/0x37b [ 42.348103] [] ? add_taint.cold+0x16/0x16 [ 42.353979] [] ? vprintk_emit+0x248/0x820 [ 42.359792] [] ? warn_slowpath_common.cold+0x5/0x20 [ 42.366570] [] warn_slowpath_common.cold+0x20/0x20 [ 42.373573] [] warn_slowpath_fmt+0xbf/0x100 [ 42.379703] [] ? warn_slowpath_common+0x120/0x120 [ 42.386327] [] ? trace_hardirqs_on+0x10/0x10 [ 42.392498] [] packet_set_ring+0x13f1/0x1940 [ 42.398756] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 42.405516] [] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 42.412478] [] ? tpacket_destruct_skb+0x510/0x510 [ 42.418958] [] ? check_stack_object+0x114/0x160 [ 42.425512] [] ? __check_object_size+0x222/0x332 [ 42.431916] [] packet_setsockopt+0x2af/0x26c0 [ 42.438064] [] ? sock_has_perm+0x2a8/0x400 [ 42.443935] [] ? sock_has_perm+0xa6/0x400 [ 42.449983] [] ? packet_release+0xba0/0xba0 [ 42.455947] [] ? handle_mm_fault+0x98d/0x3140 [ 42.462304] [] ? __fd_install+0x25b/0x640 [ 42.468287] [] ? get_unused_fd_flags+0xd0/0xd0 [ 42.474530] [] ? selinux_socket_setsockopt+0x3f/0x50 [ 42.481388] [] ? security_socket_setsockopt+0x8f/0xc0 [ 42.488328] [] SyS_setsockopt+0x159/0x240 [ 42.494129] [] ? SyS_recv+0x40/0x40 [ 42.499600] [] ? retint_user+0x18/0x3c [ 42.505226] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 42.511778] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 42.519152] Kernel Offset: disabled [ 42.522943] Rebooting in 86400 seconds..