[ 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 '10.128.10.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.755374] audit: type=1400 audit(1602967494.750:8): avc: denied { execmem } for pid=6500 comm="syz-executor311" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.757907] ================================================================================ [ 39.784229] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 39.792203] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 39.799149] CPU: 0 PID: 6500 Comm: syz-executor311 Not tainted 4.19.152-syzkaller #0 [ 39.807006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.816357] Call Trace: [ 39.818928] dump_stack+0x22c/0x33e [ 39.822568] ubsan_epilogue+0xe/0x3a [ 39.826277] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 39.832408] ? hash_ipmac_create+0x366/0xa4d [ 39.836814] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 39.841834] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 39.846669] hash_ipmac_create.cold+0x1a/0x2b [ 39.851148] ? hash_ipmac4_add+0x1fc0/0x1fc0 [ 39.855537] ip_set_create+0x70e/0x1380 [ 39.859492] ? __find_set_type_get+0x450/0x450 [ 39.864065] ? lock_downgrade+0x750/0x750 [ 39.868210] ? __find_set_type_get+0x450/0x450 [ 39.872773] nfnetlink_rcv_msg+0xeff/0x1210 [ 39.877079] ? nfnetlink_net_init+0x170/0x170 [ 39.881564] ? avc_has_extended_perms+0x1020/0x1020 [ 39.886558] ? avc_has_extended_perms+0x1020/0x1020 [ 39.891554] ? __lock_acquire+0x6ec/0x3ff0 [ 39.895768] ? mark_held_locks+0xf0/0xf0 [ 39.899812] ? cred_has_capability+0x162/0x2e0 [ 39.904400] ? cred_has_capability+0x1d9/0x2e0 [ 39.908977] ? selinux_inode_copy_up+0x180/0x180 [ 39.913724] ? selinux_inode_copy_up+0x180/0x180 [ 39.918473] netlink_rcv_skb+0x160/0x440 [ 39.922529] ? nfnetlink_net_init+0x170/0x170 [ 39.927005] ? netlink_ack+0xae0/0xae0 [ 39.930917] ? ns_capable_common+0x117/0x140 [ 39.935307] nfnetlink_rcv+0x1b2/0x41b [ 39.939176] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 39.943931] netlink_unicast+0x4d5/0x690 [ 39.947995] ? netlink_sendskb+0x110/0x110 [ 39.952659] netlink_sendmsg+0x717/0xcc0 [ 39.956702] ? nlmsg_notify+0x1a0/0x1a0 [ 39.960668] ? nlmsg_notify+0x1a0/0x1a0 [ 39.964631] sock_sendmsg+0xc7/0x130 [ 39.968348] sock_no_sendpage+0xf5/0x140 [ 39.972395] ? sk_page_frag_refill+0x1d0/0x1d0 [ 39.977126] ? pipe_lock+0x63/0x80 [ 39.980699] ? pipe_lock+0x63/0x80 [ 39.984222] ? sk_page_frag_refill+0x1d0/0x1d0 [ 39.988796] sock_sendpage+0xdf/0x140 [ 39.992585] pipe_to_sendpage+0x268/0x330 [ 39.996809] ? move_addr_to_kernel.part.0+0x110/0x110 [ 40.002002] ? direct_splice_actor+0x160/0x160 [ 40.006562] ? splice_from_pipe_next.part.0+0x2d5/0x390 [ 40.011907] __splice_from_pipe+0x3af/0x820 [ 40.016824] ? direct_splice_actor+0x160/0x160 [ 40.021431] generic_splice_sendpage+0xd4/0x140 [ 40.026088] ? __splice_from_pipe+0x820/0x820 [ 40.030653] ? security_file_permission+0x1c0/0x230 [ 40.035676] ? __splice_from_pipe+0x820/0x820 [ 40.040151] __se_sys_splice+0xf31/0x15f0 [ 40.044291] ? __sys_socket+0x16d/0x200 [ 40.048257] ? move_addr_to_kernel+0x70/0x70 [ 40.052649] ? __se_sys_tee+0xa10/0xa10 [ 40.056612] ? trace_hardirqs_off_caller+0x6e/0x210 [ 40.061627] ? do_syscall_64+0x21/0x670 [ 40.065600] do_syscall_64+0xf9/0x670 [ 40.070341] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.075861] RIP: 0033:0x4404d9 [ 40.079034] 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 [ 40.097914] RSP: 002b:00007ffe4247b0f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 40.105602] R