[ 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 '10.128.0.122' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.150450] audit: type=1400 audit(1602149337.940:8): avc: denied { execmem } for pid=6495 comm="syz-executor726" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 37.152372] ================================================================================ [ 37.179068] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 37.187050] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 37.193958] CPU: 1 PID: 6495 Comm: syz-executor726 Not tainted 4.19.150-syzkaller #0 [ 37.201815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.211160] Call Trace: [ 37.213744] dump_stack+0x22c/0x33e [ 37.217352] ubsan_epilogue+0xe/0x3a [ 37.221082] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 37.227214] ? hash_netiface_create+0x366/0xa50 [ 37.231890] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 37.236900] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 37.241721] hash_netiface_create.cold+0x1a/0x1f [ 37.246452] ? hash_netiface6_add+0x2940/0x2940 [ 37.251108] ip_set_create+0x70e/0x1380 [ 37.255070] ? __find_set_type_get+0x450/0x450 [ 37.259640] ? lock_downgrade+0x750/0x750 [ 37.263780] ? __find_set_type_get+0x450/0x450 [ 37.268340] nfnetlink_rcv_msg+0xeff/0x1210 [ 37.272763] ? nfnetlink_net_init+0x170/0x170 [ 37.277255] ? avc_has_extended_perms+0x1020/0x1020 [ 37.282261] ? avc_has_extended_perms+0x1020/0x1020 [ 37.287264] ? __lock_acquire+0x6ec/0x3ff0 [ 37.291575] ? mark_held_locks+0xf0/0xf0 [ 37.295648] ? cred_has_capability+0x162/0x2e0 [ 37.300207] ? cred_has_capability+0x1d9/0x2e0 [ 37.304766] ? selinux_inode_copy_up+0x180/0x180 [ 37.309497] ? selinux_inode_copy_up+0x180/0x180 [ 37.314249] netlink_rcv_skb+0x160/0x440 [ 37.318303] ? nfnetlink_net_init+0x170/0x170 [ 37.322778] ? netlink_ack+0xae0/0xae0 [ 37.326657] ? ns_capable_common+0x117/0x140 [ 37.331050] nfnetlink_rcv+0x1b2/0x41b [ 37.334922] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 37.339663] netlink_unicast+0x4d5/0x690 [ 37.343703] ? netlink_sendskb+0x110/0x110 [ 37.347916] netlink_sendmsg+0x717/0xcc0 [ 37.352043] ? nlmsg_notify+0x1a0/0x1a0 [ 37.356011] ? __sock_recv_ts_and_drops+0x540/0x540 [ 37.361039] ? nlmsg_notify+0x1a0/0x1a0 [ 37.365003] sock_sendmsg+0xc7/0x130 [ 37.368708] ___sys_sendmsg+0x7bb/0x8f0 [ 37.372677] ? copy_msghdr_from_user+0x440/0x440 [ 37.377414] ? do_huge_pmd_anonymous_page+0x939/0x1d70 [ 37.382691] ? prep_transhuge_page+0xa0/0xa0 [ 37.387079] ? check_preemption_disabled+0x41/0x2b0 [ 37.392074] ? mark_held_locks+0xf0/0xf0 [ 37.396118] ? __handle_mm_fault+0xf34/0x4370 [ 37.400606] ? errseq_sample+0x56/0x70 [ 37.404472] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 37.409290] ? find_held_lock+0x2d/0x110 [ 37.413331] ? find_held_lock+0x2d/0x110 [ 37.417370] ? __fget_light+0x1a2/0x230 [ 37.421340] __x64_sys_sendmsg+0x132/0x220 [ 37.425566] ? __sys_sendmsg+0x1b0/0x1b0 [ 37.429624] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.434981] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.439976] ? do_syscall_64+0x21/0x670 [ 37.443961] do_syscall_64+0xf9/0x670 [ 37.447758] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.452926] RIP: 0033:0x440429 [ 37.456098] 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 [ 37.474993] RSP: 002b:00007ffcbec4a098 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 37.482681] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440429 [ 37.489933] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000003 [ 37.497199] RBP: 00000000006ca018 R08: 000000000000000