[ 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 '10.128.10.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.480590] audit: type=1400 audit(1601890377.135:8): avc: denied { execmem } for pid=6482 comm="syz-executor043" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.482537] ================================================================================ [ 38.509222] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 38.517176] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 38.524101] CPU: 0 PID: 6482 Comm: syz-executor043 Not tainted 4.19.149-syzkaller #0 [ 38.531956] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.541288] Call Trace: [ 38.543864] dump_stack+0x22c/0x33e [ 38.547474] ubsan_epilogue+0xe/0x3a [ 38.551168] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 38.557297] ? hash_netportnet_create+0x366/0xa4d [ 38.562138] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 38.567177] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 38.572013] hash_netportnet_create.cold+0x1a/0x23 [ 38.576929] ? hash_netportnet4_add+0x27c0/0x27c0 [ 38.581753] ip_set_create+0x70e/0x1380 [ 38.585713] ? __find_set_type_get+0x450/0x450 [ 38.590288] ? lock_downgrade+0x750/0x750 [ 38.594506] ? __find_set_type_get+0x450/0x450 [ 38.599072] nfnetlink_rcv_msg+0xeff/0x1210 [ 38.603382] ? nfnetlink_net_init+0x170/0x170 [ 38.607865] ? avc_has_extended_perms+0x1020/0x1020 [ 38.612861] ? avc_has_extended_perms+0x1020/0x1020 [ 38.617857] ? __lock_acquire+0x6ec/0x3ff0 [ 38.622075] ? mark_held_locks+0xf0/0xf0 [ 38.626154] ? cred_has_capability+0x162/0x2e0 [ 38.630714] ? cred_has_capability+0x1d9/0x2e0 [ 38.635293] ? selinux_inode_copy_up+0x180/0x180 [ 38.640042] ? selinux_inode_copy_up+0x180/0x180 [ 38.644782] netlink_rcv_skb+0x160/0x440 [ 38.648840] ? nfnetlink_net_init+0x170/0x170 [ 38.653315] ? netlink_ack+0xae0/0xae0 [ 38.657199] ? ns_capable_common+0x117/0x140 [ 38.661602] nfnetlink_rcv+0x1b2/0x41b [ 38.665485] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 38.670223] netlink_unicast+0x4d5/0x690 [ 38.674268] ? netlink_sendskb+0x110/0x110 [ 38.678487] netlink_sendmsg+0x717/0xcc0 [ 38.682549] ? nlmsg_notify+0x1a0/0x1a0 [ 38.686593] ? __sock_recv_ts_and_drops+0x540/0x540 [ 38.691617] ? nlmsg_notify+0x1a0/0x1a0 [ 38.695577] sock_sendmsg+0xc7/0x130 [ 38.699272] ___sys_sendmsg+0x7bb/0x8f0 [ 38.703228] ? copy_msghdr_from_user+0x440/0x440 [ 38.707967] ? do_huge_pmd_anonymous_page+0x939/0x1d70 [ 38.713227] ? prep_transhuge_page+0xa0/0xa0 [ 38.717635] ? check_preemption_disabled+0x41/0x2b0 [ 38.722634] ? mark_held_locks+0xf0/0xf0 [ 38.726678] ? __handle_mm_fault+0xf34/0x4370 [ 38.731155] ? errseq_sample+0x56/0x70 [ 38.735026] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 38.739868] ? find_held_lock+0x2d/0x110 [ 38.743997] ? find_held_lock+0x2d/0x110 [ 38.748040] ? __fget_light+0x1a2/0x230 [ 38.751997] __x64_sys_sendmsg+0x132/0x220 [ 38.756214] ? __sys_sendmsg+0x1b0/0x1b0 [ 38.760276] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.765620] ? trace_hardirqs_off_caller+0x6e/0x210 [ 38.770618] ? do_syscall_64+0x21/0x670 [ 38.774624] do_syscall_64+0xf9/0x670 [ 38.778786] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.783967] RIP: 0033:0x440429 [ 38.787493] 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 [ 38.806395] RSP: 002b:00007ffef6ca7498 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 38.814171] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440429 [ 38.821424] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 38.828677] RBP: 00000000006ca018 R08: