[ 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 '10.128.0.238' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.527758] audit: type=1400 audit(1602250153.736:8): avc: denied { execmem } for pid=6488 comm="syz-executor484" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.530427] ================================================================================ [ 39.556322] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 39.564269] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 39.571182] CPU: 1 PID: 6488 Comm: syz-executor484 Not tainted 4.19.150-syzkaller #0 [ 39.579045] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.588418] Call Trace: [ 39.590990] dump_stack+0x22c/0x33e [ 39.594632] ubsan_epilogue+0xe/0x3a [ 39.598328] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 39.604455] ? hash_mac_create+0x358/0x847 [ 39.608669] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 39.613668] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 39.618492] hash_mac_create.cold+0x19/0x25 [ 39.622794] ? hash_mac4_add+0x1e60/0x1e60 [ 39.627024] ip_set_create+0x70e/0x1380 [ 39.630981] ? __find_set_type_get+0x450/0x450 [ 39.635554] ? lock_downgrade+0x750/0x750 [ 39.639742] ? __find_set_type_get+0x450/0x450 [ 39.644326] nfnetlink_rcv_msg+0xeff/0x1210 [ 39.648641] ? nfnetlink_net_init+0x170/0x170 [ 39.653146] ? avc_has_extended_perms+0x1020/0x1020 [ 39.658162] ? avc_has_extended_perms+0x1020/0x1020 [ 39.663225] ? __lock_acquire+0x6ec/0x3ff0 [ 39.667449] ? mark_held_locks+0xf0/0xf0 [ 39.671501] ? cred_has_capability+0x162/0x2e0 [ 39.676184] ? cred_has_capability+0x1d9/0x2e0 [ 39.680816] ? selinux_inode_copy_up+0x180/0x180 [ 39.685555] ? selinux_inode_copy_up+0x180/0x180 [ 39.690299] netlink_rcv_skb+0x160/0x440 [ 39.694341] ? nfnetlink_net_init+0x170/0x170 [ 39.698816] ? netlink_ack+0xae0/0xae0 [ 39.702688] ? ns_capable_common+0x117/0x140 [ 39.707084] nfnetlink_rcv+0x1b2/0x41b [ 39.710968] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 39.715726] netlink_unicast+0x4d5/0x690 [ 39.719770] ? netlink_sendskb+0x110/0x110 [ 39.724007] netlink_sendmsg+0x717/0xcc0 [ 39.728052] ? nlmsg_notify+0x1a0/0x1a0 [ 39.732006] ? __sock_recv_ts_and_drops+0x540/0x540 [ 39.737023] ? nlmsg_notify+0x1a0/0x1a0 [ 39.740983] sock_sendmsg+0xc7/0x130 [ 39.744698] ___sys_sendmsg+0x7bb/0x8f0 [ 39.748670] ? copy_msghdr_from_user+0x440/0x440 [ 39.753415] ? do_huge_pmd_anonymous_page+0x939/0x1d70 [ 39.758673] ? prep_transhuge_page+0xa0/0xa0 [ 39.763064] ? check_preemption_disabled+0x41/0x2b0 [ 39.768060] ? mark_held_locks+0xf0/0xf0 [ 39.772119] ? __handle_mm_fault+0xf34/0x4370 [ 39.776595] ? errseq_sample+0x56/0x70 [ 39.780463] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 39.785288] ? find_held_lock+0x2d/0x110 [ 39.789333] ? find_held_lock+0x2d/0x110 [ 39.793376] ? __fget_light+0x1a2/0x230 [ 39.797347] __x64_sys_sendmsg+0x132/0x220 [ 39.801563] ? __sys_sendmsg+0x1b0/0x1b0 [ 39.805627] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.810970] ? trace_hardirqs_off_caller+0x6e/0x210 [ 39.815966] ? do_syscall_64+0x21/0x670 [ 39.819922] do_syscall_64+0xf9/0x670 [ 39.823703] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.828888] RIP: 0033:0x440419 [ 39.832063] 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 [ 39.850944] RSP: 002b:00007fff60abac08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 39.858629] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440419 [ 39.865881] RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003 [ 39.873130] RBP: 00000000006ca018 R08: 0000000000000005 R09: 0000000