[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.945476] audit: type=1400 audit(1600616300.674:8): avc: denied { execmem } for pid=6478 comm="syz-executor605" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 39.947487] ================================================================================ [ 39.974025] UBSAN: Undefined behaviour in net/netfilter/ipset/ip_set_hash_gen.h:125:6 [ 39.981995] shift exponent 32 is too large for 32-bit type 'unsigned int' [ 39.988953] CPU: 1 PID: 6478 Comm: syz-executor605 Not tainted 4.19.146-syzkaller #0 [ 39.996834] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.006184] Call Trace: [ 40.008775] dump_stack+0x22c/0x33e [ 40.012390] ubsan_epilogue+0xe/0x3a [ 40.016090] __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250 [ 40.022224] ? hash_netnet_create+0x366/0xa4d [ 40.026703] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 40.031733] ? kmem_cache_alloc_trace+0x379/0x4b0 [ 40.036558] hash_netnet_create.cold+0x1a/0x22 [ 40.041125] ? hash_netnet4_add+0x2690/0x2690 [ 40.045600] ip_set_create+0x70e/0x1380 [ 40.049559] ? __find_set_type_get+0x450/0x450 [ 40.054133] ? lock_downgrade+0x750/0x750 [ 40.058262] ? __find_set_type_get+0x450/0x450 [ 40.062827] nfnetlink_rcv_msg+0xeff/0x1210 [ 40.067139] ? nfnetlink_net_init+0x170/0x170 [ 40.071620] ? avc_has_extended_perms+0x1020/0x1020 [ 40.076615] ? avc_has_extended_perms+0x1020/0x1020 [ 40.081615] ? __lock_acquire+0x6ec/0x3ff0 [ 40.085830] ? mark_held_locks+0xf0/0xf0 [ 40.089877] ? cred_has_capability+0x162/0x2e0 [ 40.094458] ? cred_has_capability+0x1d9/0x2e0 [ 40.099022] ? selinux_inode_copy_up+0x180/0x180 [ 40.103778] ? selinux_inode_copy_up+0x180/0x180 [ 40.108529] netlink_rcv_skb+0x160/0x440 [ 40.112575] ? nfnetlink_net_init+0x170/0x170 [ 40.117056] ? netlink_ack+0xae0/0xae0 [ 40.120987] ? ns_capable_common+0x117/0x140 [ 40.125394] nfnetlink_rcv+0x1b2/0x41b [ 40.129265] ? nfnetlink_rcv_batch+0x1710/0x1710 [ 40.134007] netlink_unicast+0x4d5/0x690 [ 40.138065] ? netlink_sendskb+0x110/0x110 [ 40.142284] netlink_sendmsg+0x717/0xcc0 [ 40.146340] ? nlmsg_notify+0x1a0/0x1a0 [ 40.150292] ? __sock_recv_ts_and_drops+0x540/0x540 [ 40.155306] ? nlmsg_notify+0x1a0/0x1a0 [ 40.159278] sock_sendmsg+0xc7/0x130 [ 40.162973] ___sys_sendmsg+0x7bb/0x8f0 [ 40.166928] ? copy_msghdr_from_user+0x440/0x440 [ 40.171681] ? do_huge_pmd_anonymous_page+0x939/0x1d70 [ 40.176949] ? prep_transhuge_page+0xa0/0xa0 [ 40.181364] ? check_preemption_disabled+0x41/0x2b0 [ 40.186365] ? mark_held_locks+0xf0/0xf0 [ 40.190414] ? __handle_mm_fault+0xf34/0x4370 [ 40.194902] ? errseq_sample+0x56/0x70 [ 40.198788] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 40.203615] ? find_held_lock+0x2d/0x110 [ 40.207671] ? find_held_lock+0x2d/0x110 [ 40.211717] ? __fget_light+0x1a2/0x230 [ 40.215677] __x64_sys_sendmsg+0x132/0x220 [ 40.219910] ? __sys_sendmsg+0x1b0/0x1b0 [ 40.224011] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.228762] ? trace_hardirqs_off_caller+0x69/0x210 [ 40.233760] ? do_syscall_64+0x21/0x670 [ 40.237739] do_syscall_64+0xf9/0x670 [ 40.241531] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.246717] RIP: 0033:0x440419 [ 40.249893] 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 [ 40.268774] RSP: 002b:00007ffd7f9b3878 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 40.276476] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440419 [ 40.283724] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 40.290972] RBP: 00000000006ca018 R08: 000000000000000c R09: 0000000