[ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.80' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.705803] audit: type=1400 audit(1601076536.268:8): avc: denied { execmem } for pid=6496 comm="syz-executor212" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 40.710195] ================================================================================ [ 40.735388] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 40.743372] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 40.750385] CPU: 1 PID: 6496 Comm: syz-executor212 Not tainted 4.19.147-syzkaller #0 [ 40.758291] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.767642] Call Trace: [ 40.770235] dump_stack+0x22c/0x33e [ 40.773861] ubsan_epilogue+0xe/0x3a [ 40.777562] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 40.783713] ? hash_ipmac_create+0x366/0xa4d [ 40.788118] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 40.793123] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 40.797960] hash_ipmac_create.cold+0x1a/0x2b [ 40.802444] ? hash_ipmac4_add+0x1fc0/0x1fc0 [ 40.806833] ip_set_create+0x70e/0x1380 [ 40.810901] ? __find_set_type_get+0x450/0x450 [ 40.815475] ? lock_downgrade+0x750/0x750 [ 40.819607] ? __find_set_type_get+0x450/0x450 [ 40.824171] nfnetlink_rcv_msg+0xeff/0x1210 [ 40.828483] ? nfnetlink_net_init+0x170/0x170 [ 40.832975] ? avc_has_extended_perms+0x1020/0x1020 [ 40.838001] ? avc_has_extended_perms+0x1020/0x1020 [ 40.843005] ? __lock_acquire+0x6ec/0x3ff0 [ 40.847323] ? mark_held_locks+0xf0/0xf0 [ 40.851371] ? cred_has_capability+0x162/0x2e0 [ 40.856031] ? cred_has_capability+0x1d9/0x2e0 [ 40.860689] ? selinux_inode_copy_up+0x180/0x180 [ 40.865429] ? selinux_inode_copy_up+0x180/0x180 [ 40.870188] netlink_rcv_skb+0x160/0x440 [ 40.874246] ? nfnetlink_net_init+0x170/0x170 [ 40.878730] ? netlink_ack+0xae0/0xae0 [ 40.882605] ? ns_capable_common+0x117/0x140 [ 40.887002] nfnetlink_rcv+0x1b2/0x41b [ 40.890889] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 40.895741] netlink_unicast+0x4d5/0x690 [ 40.899814] ? netlink_sendskb+0x110/0x110 [ 40.904039] netlink_sendmsg+0x717/0xcc0 [ 40.908085] ? nlmsg_notify+0x1a0/0x1a0 [ 40.912048] ? nlmsg_notify+0x1a0/0x1a0 [ 40.916008] sock_sendmsg+0xc7/0x130 [ 40.919718] sock_no_sendpage+0xf5/0x140 [ 40.923776] ? sk_page_frag_refill+0x1d0/0x1d0 [ 40.928352] ? pipe_lock+0x63/0x80 [ 40.931876] ? pipe_lock+0x63/0x80 [ 40.935452] ? sk_page_frag_refill+0x1d0/0x1d0 [ 40.940024] sock_sendpage+0xdf/0x140 [ 40.943835] pipe_to_sendpage+0x268/0x330 [ 40.948059] ? move_addr_to_kernel.part.0+0x110/0x110 [ 40.953251] ? direct_splice_actor+0x160/0x160 [ 40.957830] ? splice_from_pipe_next.part.0+0x2d5/0x390 [ 40.963202] __splice_from_pipe+0x3af/0x820 [ 40.967515] ? direct_splice_actor+0x160/0x160 [ 40.972108] generic_splice_sendpage+0xd4/0x140 [ 40.976766] ? __splice_from_pipe+0x820/0x820 [ 40.981262] ? security_file_permission+0x1c0/0x230 [ 40.986271] ? __splice_from_pipe+0x820/0x820 [ 40.990751] __se_sys_splice+0xf31/0x15f0 [ 40.994889] ? __sys_socket+0x16d/0x200 [ 40.998864] ? move_addr_to_kernel+0x70/0x70 [ 41.003269] ? __se_sys_tee+0xa10/0xa10 [ 41.007230] ? trace_hardirqs_off_caller+0x69/0x210 [ 41.012249] ? do_syscall_64+0x21/0x670 [ 41.016216] do_syscall_64+0xf9/0x670 [ 41.020031] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.025211] RIP: 0033:0x4404d9 [ 41.028386] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 41.047363] RSP: 002b:00007fff3ac0d1d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 41.055677] RAX: