[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.832891] audit: type=1400 audit(1601628020.766:8): avc: denied { execmem } for pid=6513 comm="syz-executor011" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.835580] ================================================================================ [ 38.861910] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 38.870025] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 38.877028] CPU: 1 PID: 6513 Comm: syz-executor011 Not tainted 4.19.149-syzkaller #0 [ 38.884894] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.894236] Call Trace: [ 38.896821] dump_stack+0x22c/0x33e [ 38.900649] ubsan_epilogue+0xe/0x3a [ 38.904355] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 38.910505] ? hash_ip_create+0x43d/0xbf1 [ 38.914642] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 38.919685] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 38.924567] hash_ip_create.cold+0x1a/0x29 [ 38.928931] ? hash_ip4_add+0x1de0/0x1de0 [ 38.933212] ip_set_create+0x70e/0x1380 [ 38.937192] ? __find_set_type_get+0x450/0x450 [ 38.941878] ? lock_downgrade+0x750/0x750 [ 38.946183] ? __find_set_type_get+0x450/0x450 [ 38.950762] nfnetlink_rcv_msg+0xeff/0x1210 [ 38.955080] ? nfnetlink_net_init+0x170/0x170 [ 38.959571] ? avc_has_extended_perms+0x1020/0x1020 [ 38.964575] ? avc_has_extended_perms+0x1020/0x1020 [ 38.969607] ? __lock_acquire+0x6ec/0x3ff0 [ 38.973840] ? mark_held_locks+0xf0/0xf0 [ 38.978146] ? cred_has_capability+0x162/0x2e0 [ 38.982800] ? cred_has_capability+0x1d9/0x2e0 [ 38.987382] ? selinux_inode_copy_up+0x180/0x180 [ 38.992186] ? selinux_inode_copy_up+0x180/0x180 [ 38.997023] netlink_rcv_skb+0x160/0x440 [ 39.001142] ? nfnetlink_net_init+0x170/0x170 [ 39.005631] ? netlink_ack+0xae0/0xae0 [ 39.009526] ? ns_capable_common+0x117/0x140 [ 39.013927] nfnetlink_rcv+0x1b2/0x41b [ 39.017807] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 39.022946] netlink_unicast+0x4d5/0x690 [ 39.027092] ? netlink_sendskb+0x110/0x110 [ 39.031325] netlink_sendmsg+0x717/0xcc0 [ 39.035410] ? nlmsg_notify+0x1a0/0x1a0 [ 39.039376] ? __sock_recv_ts_and_drops+0x540/0x540 [ 39.044398] ? nlmsg_notify+0x1a0/0x1a0 [ 39.048501] sock_sendmsg+0xc7/0x130 [ 39.052301] ___sys_sendmsg+0x7bb/0x8f0 [ 39.056275] ? copy_msghdr_from_user+0x440/0x440 [ 39.061024] ? do_huge_pmd_anonymous_page+0x939/0x1d70 [ 39.066448] ? prep_transhuge_page+0xa0/0xa0 [ 39.070851] ? check_preemption_disabled+0x41/0x2b0 [ 39.076184] ? mark_held_locks+0xf0/0xf0 [ 39.080346] ? __handle_mm_fault+0xf34/0x4370 [ 39.084834] ? errseq_sample+0x56/0x70 [ 39.088712] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 39.093547] ? find_held_lock+0x2d/0x110 [ 39.097695] ? find_held_lock+0x2d/0x110 [ 39.101768] ? __fget_light+0x1a2/0x230 [ 39.105864] __x64_sys_sendmsg+0x132/0x220 [ 39.110109] ? __sys_sendmsg+0x1b0/0x1b0 [ 39.114181] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.119586] ? trace_hardirqs_off_caller+0x6e/0x210 [ 39.124595] ? do_syscall_64+0x21/0x670 [ 39.128561] do_syscall_64+0xf9/0x670 [ 39.132357] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.137598] RIP: 0033:0x440409 [ 39.140784] 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 [ 39.159807] RSP: 002b:00007ffe526c5c08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 39.167627] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440409 [ 39.175283] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 39.182607] RBP: 00