[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.103' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.741200] audit: type=1400 audit(1600654270.540:8): avc: denied { execmem } for pid=6481 comm="syz-executor926" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.791023] ================================================================================ [ 39.799972] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 39.807922] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 39.814880] CPU: 1 PID: 6483 Comm: syz-executor926 Not tainted 4.19.146-syzkaller #0 [ 39.822740] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.832077] Call Trace: [ 39.834652] dump_stack+0x22c/0x33e [ 39.838271] ubsan_epilogue+0xe/0x3a [ 39.841974] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 39.848104] ? hash_ipportip_create+0x366/0xa4d [ 39.852761] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 39.857761] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 39.862589] hash_ipportip_create.cold+0x1a/0x21 [ 39.867351] ? hash_ipportip4_add+0x2050/0x2050 [ 39.872006] ip_set_create+0x70e/0x1380 [ 39.875969] ? __find_set_type_get+0x450/0x450 [ 39.880546] ? lock_downgrade+0x750/0x750 [ 39.884680] ? __find_set_type_get+0x450/0x450 [ 39.889248] nfnetlink_rcv_msg+0xeff/0x1210 [ 39.893559] ? nfnetlink_net_init+0x170/0x170 [ 39.898043] ? avc_has_extended_perms+0x1020/0x1020 [ 39.903040] ? avc_has_extended_perms+0x1020/0x1020 [ 39.908039] ? __lock_acquire+0x6ec/0x3ff0 [ 39.912257] ? mark_held_locks+0xf0/0xf0 [ 39.916305] ? cred_has_capability+0x162/0x2e0 [ 39.920870] ? cred_has_capability+0x1d9/0x2e0 [ 39.925436] ? selinux_inode_copy_up+0x180/0x180 [ 39.930174] ? selinux_inode_copy_up+0x180/0x180 [ 39.934915] netlink_rcv_skb+0x160/0x440 [ 39.938988] ? nfnetlink_net_init+0x170/0x170 [ 39.943494] ? netlink_ack+0xae0/0xae0 [ 39.947384] ? ns_capable_common+0x117/0x140 [ 39.951786] nfnetlink_rcv+0x1b2/0x41b [ 39.955663] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 39.960406] netlink_unicast+0x4d5/0x690 [ 39.964448] ? netlink_sendskb+0x110/0x110 [ 39.968688] netlink_sendmsg+0x717/0xcc0 [ 39.972731] ? nlmsg_notify+0x1a0/0x1a0 [ 39.976687] ? nlmsg_notify+0x1a0/0x1a0 [ 39.980643] sock_sendmsg+0xc7/0x130 [ 39.984359] sock_no_sendpage+0xf5/0x140 [ 39.988418] ? sk_page_frag_refill+0x1d0/0x1d0 [ 39.993450] ? pipe_lock+0x63/0x80 [ 39.996999] ? pipe_lock+0x63/0x80 [ 40.000556] ? sk_page_frag_refill+0x1d0/0x1d0 [ 40.005137] sock_sendpage+0xdf/0x140 [ 40.008928] pipe_to_sendpage+0x268/0x330 [ 40.013133] ? move_addr_to_kernel.part.0+0x110/0x110 [ 40.018316] ? direct_splice_actor+0x160/0x160 [ 40.022880] ? splice_from_pipe_next.part.0+0x2d5/0x390 [ 40.028232] __splice_from_pipe+0x3af/0x820 [ 40.032536] ? direct_splice_actor+0x160/0x160 [ 40.037166] generic_splice_sendpage+0xd4/0x140 [ 40.041819] ? __splice_from_pipe+0x820/0x820 [ 40.046297] ? security_file_permission+0x1c0/0x230 [ 40.051297] ? __splice_from_pipe+0x820/0x820 [ 40.055772] __se_sys_splice+0xf31/0x15f0 [ 40.059906] ? find_held_lock+0x2d/0x110 [ 40.063948] ? ret_from_fork+0x8/0x30 [ 40.067729] ? __se_sys_tee+0xa10/0xa10 [ 40.071742] ? trace_hardirqs_off_caller+0x69/0x210 [ 40.076863] ? do_syscall_64+0x21/0x670 [ 40.081002] do_syscall_64+0xf9/0x670 [ 40.084794] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.089971] RIP: 0033:0x445b49 [ 40.093157] Code: e8 bc b7 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 ab 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.112048] RSP: 002b:00007f0d16455da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 40.119743] RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 0000000000445b49 [ 40.126996] RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 [ 40.134260] RBP: 00000000006dac50 R08: 000000000004ffe0 R09: 0000000000000000 [ 40.141529