[ 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 '10.128.0.189' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.239168] audit: type=1400 audit(1600631693.318:8): avc: denied { execmem } for pid=6477 comm="syz-executor289" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 40.241903] ================================================================================ [ 40.267961] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 40.275999] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 40.282924] CPU: 0 PID: 6477 Comm: syz-executor289 Not tainted 4.19.146-syzkaller #0 [ 40.291306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.300640] Call Trace: [ 40.303234] dump_stack+0x22c/0x33e [ 40.306849] ubsan_epilogue+0xe/0x3a [ 40.310602] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 40.316782] ? hash_net_create+0x366/0xa50 [ 40.321033] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 40.326047] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 40.330900] hash_net_create.cold+0x1a/0x1f [ 40.335204] ? hash_net6_add+0x2680/0x2680 [ 40.339421] ip_set_create+0x70e/0x1380 [ 40.343381] ? __find_set_type_get+0x450/0x450 [ 40.348092] ? lock_downgrade+0x750/0x750 [ 40.352245] ? __find_set_type_get+0x450/0x450 [ 40.356814] nfnetlink_rcv_msg+0xeff/0x1210 [ 40.361153] ? nfnetlink_net_init+0x170/0x170 [ 40.365734] ? avc_has_extended_perms+0x1020/0x1020 [ 40.370796] ? avc_has_extended_perms+0x1020/0x1020 [ 40.375801] ? __lock_acquire+0x6ec/0x3ff0 [ 40.380043] ? mark_held_locks+0xf0/0xf0 [ 40.384103] ? cred_has_capability+0x162/0x2e0 [ 40.388667] ? cred_has_capability+0x1d9/0x2e0 [ 40.393421] ? selinux_inode_copy_up+0x180/0x180 [ 40.398170] ? selinux_inode_copy_up+0x180/0x180 [ 40.402921] netlink_rcv_skb+0x160/0x440 [ 40.406980] ? nfnetlink_net_init+0x170/0x170 [ 40.411546] ? netlink_ack+0xae0/0xae0 [ 40.415503] ? ns_capable_common+0x117/0x140 [ 40.419891] nfnetlink_rcv+0x1b2/0x41b [ 40.423759] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 40.428499] netlink_unicast+0x4d5/0x690 [ 40.432548] ? netlink_sendskb+0x110/0x110 [ 40.436788] netlink_sendmsg+0x717/0xcc0 [ 40.440831] ? nlmsg_notify+0x1a0/0x1a0 [ 40.444799] ? __sock_recv_ts_and_drops+0x540/0x540 [ 40.449801] ? nlmsg_notify+0x1a0/0x1a0 [ 40.453770] sock_sendmsg+0xc7/0x130 [ 40.457479] ___sys_sendmsg+0x7bb/0x8f0 [ 40.461504] ? copy_msghdr_from_user+0x440/0x440 [ 40.466293] ? do_huge_pmd_anonymous_page+0x939/0x1d70 [ 40.471568] ? prep_transhuge_page+0xa0/0xa0 [ 40.475958] ? check_preemption_disabled+0x41/0x2b0 [ 40.480960] ? mark_held_locks+0xf0/0xf0 [ 40.485015] ? __handle_mm_fault+0xf34/0x4370 [ 40.489492] ? errseq_sample+0x56/0x70 [ 40.493365] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 40.498202] ? find_held_lock+0x2d/0x110 [ 40.502243] ? find_held_lock+0x2d/0x110 [ 40.506296] ? __fget_light+0x1a2/0x230 [ 40.510270] __x64_sys_sendmsg+0x132/0x220 [ 40.514502] ? __sys_sendmsg+0x1b0/0x1b0 [ 40.518586] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.523322] ? trace_hardirqs_off_caller+0x69/0x210 [ 40.528332] ? do_syscall_64+0x21/0x670 [ 40.532287] do_syscall_64+0xf9/0x670 [ 40.536069] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.541238] RIP: 0033:0x440419 [ 40.544409] 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 [ 40.563483] RSP: 002b:00007ffca1fa6558 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 40.571280] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440419 [ 40.578725] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003 [ 40.586532] RBP: 00000000006ca018 R08: 0000000