[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.63' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.218246] ================================================================== [ 28.225845] BUG: KASAN: slab-out-of-bounds in tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 [ 28.233993] Read of size 4 at addr ffff8880a4e319d0 by task syz-executor374/7972 [ 28.241498] [ 28.243111] CPU: 0 PID: 7972 Comm: syz-executor374 Not tainted 4.14.277-syzkaller #0 [ 28.250977] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.260305] Call Trace: [ 28.262872] dump_stack+0x1b2/0x281 [ 28.266476] print_address_description.cold+0x54/0x1d3 [ 28.271817] kasan_report_error.cold+0x8a/0x191 [ 28.276462] ? tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 [ 28.281890] __asan_report_load4_noabort+0x68/0x70 [ 28.286795] ? tipc_in_scope+0x50/0x60 [ 28.290657] ? tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 [ 28.296089] tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 [ 28.301340] tipc_sendmcast+0x51a/0xac0 [ 28.305294] ? tipc_shutdown+0x2f0/0x2f0 [ 28.309343] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 28.315207] ? lock_downgrade+0x740/0x740 [ 28.319333] ? unwind_next_frame+0xe54/0x17d0 [ 28.323808] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.329157] ? is_bpf_text_address+0xb8/0x150 [ 28.333635] ? kernel_text_address+0xbd/0xf0 [ 28.338023] ? __kernel_text_address+0x9/0x30 [ 28.342490] ? __kernel_text_address+0x9/0x30 [ 28.346962] ? unwind_get_return_address+0x51/0x90 [ 28.351864] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.357198] ? __save_stack_trace+0xa0/0x160 [ 28.361581] __tipc_sendmsg+0xbab/0xf90 [ 28.365531] ? tipc_sendmcast+0xac0/0xac0 [ 28.369655] ? unwind_next_frame+0xe54/0x17d0 [ 28.374130] ? __save_stack_trace+0x63/0x160 [ 28.378538] ? deref_stack_reg+0x124/0x1a0 [ 28.382745] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 28.388606] ? lock_downgrade+0x740/0x740 [ 28.392725] ? unwind_next_frame+0xe54/0x17d0 [ 28.397197] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.402535] ? __lockdep_init_map+0x100/0x560 [ 28.407015] __tipc_sendstream+0x695/0x8c0 [ 28.411227] ? tipc_sendmsg+0x70/0x70 [ 28.415005] ? save_trace+0xd6/0x290 [ 28.418693] ? mark_lock+0x64e/0x1050 [ 28.422482] ? check_usage_forwards+0x2d0/0x2d0 [ 28.427128] tipc_send_packet+0x5a/0x90 [ 28.431078] ? tipc_wait_for_rcvmsg.isra.0+0x430/0x430 [ 28.436329] sock_sendmsg+0xb5/0x100 [ 28.440023] ___sys_sendmsg+0x6c8/0x800 [ 28.443974] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 28.448705] ? lock_downgrade+0x740/0x740 [ 28.452833] ? __lru_cache_add+0x178/0x250 [ 28.457041] ? do_raw_spin_unlock+0x164/0x220 [ 28.461514] ? _raw_spin_unlock+0x29/0x40 [ 28.465638] ? do_huge_pmd_anonymous_page+0x72e/0x1700 [ 28.470890] ? prep_transhuge_page+0xa0/0xa0 [ 28.475271] ? _raw_spin_unlock+0x29/0x40 [ 28.479392] ? __pmd_alloc+0x27f/0x3f0 [ 28.483254] ? lock_downgrade+0x740/0x740 [ 28.487379] ? vm_insert_page+0x7c0/0x7c0 [ 28.491502] ? __fdget+0x167/0x1f0 [ 28.495022] ? sockfd_lookup_light+0xb2/0x160 [ 28.499490] __sys_sendmsg+0xa3/0x120 [ 28.503264] ? SyS_shutdown+0x160/0x160 [ 28.507216] ? up_read+0x17/0x30 [ 28.510579] ? __do_page_fault+0x159/0xad0 [ 28.514797] SyS_sendmsg+0x27/0x40 [ 28.518321] ? __sys_sendmsg+0x120/0x120 [ 28.522362] do_syscall_64+0x1d5/0x640 [ 28.526403] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.531569] RIP: 0033:0x7f27cb440049 [ 28.535256] RSP: 002b:00007ffedad94158 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 28.542944] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f27cb440049 [ 28.550285] RDX: 0000000000000000 RSI: 0000000020001400 RDI: 0000000000000003 [ 28.557530] RBP: 00007f27cb404030 R08: 0000000000000000 R09: 0000000000000000 [ 28.564774] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f27cb4040c0 [ 28.572020] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.579269] [ 28.580871] Allocated by task 1: [ 28.584213] kasan_kmalloc+0xeb/0x160 [ 28.587986] __kmalloc+0x15a/0x400 [ 28.591500] tipc_nameseq_create+0x53/0x290 [ 28.595793] tipc_nametbl_insert_publ+0xb37/0x14e0 [ 28.600694] tipc_nametbl_publish+0x211/0x3f0 [ 28.605160] tipc_bind+0x2c4/0x600 [ 28.608671] tipc_server_start+0x31f/0x880 [ 28.612876] tipc_topsrv_init_net+0x53b/0x730 [ 28.617342] ops_init+0xaa/0x3e0 [ 28.620681] register_pernet_operations+0x32f/0x750 [ 28.625669] register_pernet_device+0x28/0x70 [ 28.630140] tipc_init+0x7d/0x137 [ 28.633565] do_one_initcall+0x88/0x210 [ 28.637514] kernel_init_freeable+0x565/0x626 [ 28.641981] kernel_init+0xd/0x162 [ 28.645498] ret_from_fork+0x24/0x30 [ 28.649198] [ 28.650798] Freed by task 0: [ 28.653785] (stack is not available) [ 28.657466] [ 28.659067] The buggy address belongs to the object at ffff8880a4e319c0 [ 28.659067] which belongs to the cache kmalloc-32 of size 32 [ 28.671520] The buggy address is located 16 bytes inside of [ 28.671520] 32-byte region [ffff8880a4e319c0, ffff8880a4e319e0) [ 28.683191] The buggy address belongs to the page: [ 28.688107] page:ffffea0002938c40 count:1 mapcount:0 mapping:ffff8880a4e31000 index:0xffff8880a4e31fc1 [ 28.697525] flags: 0xfff00000000100(slab) [ 28.701660] raw: 00fff00000000100 ffff8880a4e31000 ffff8880a4e31fc1 0000000100000034 [ 28.709516] raw: ffffea000296db60 ffffea000293d160 ffff88813fe741c0 0000000000000000 [ 28.717364] page dumped because: kasan: bad access detected [ 28.723045] [ 28.724644] Memory state around the buggy address: [ 28.729545] ffff8880a4e31880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 28.736876] ffff8880a4e31900: 00 01 fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 28.744206] >ffff8880a4e31980: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc [ 28.751534] ^ [ 28.757477] ffff8880a4e31a00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 28.764808] ffff8880a4e31a80: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc [ 28.772139] ================================================================== [ 28.779473] Disabling lock debugging due to kernel taint [ 28.784939] Kernel panic - not syncing: panic_on_warn set ... [ 28.784939] [ 28.792289] CPU: 0 PID: 7972 Comm: syz-executor374 Tainted: G B 4.14.277-syzkaller #0 [ 28.801368] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.810711] Call Trace: [ 28.813293] dump_stack+0x1b2/0x281 [ 28.816911] panic+0x1f9/0x42d [ 28.820088] ? add_taint.cold+0x16/0x16 [ 28.824038] kasan_end_report+0x43/0x49 [ 28.827988] kasan_report_error.cold+0xa7/0x191 [ 28.832639] ? tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 [ 28.838067] __asan_report_load4_noabort+0x68/0x70 [ 28.843316] ? tipc_in_scope+0x50/0x60 [ 28.847174] ? tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 [ 28.852596] tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 [ 28.857846] tipc_sendmcast+0x51a/0xac0 [ 28.861802] ? tipc_shutdown+0x2f0/0x2f0 [ 28.865955] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 28.871866] ? lock_downgrade+0x740/0x740 [ 28.875990] ? unwind_next_frame+0xe54/0x17d0 [ 28.880511] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.885854] ? is_bpf_text_address+0xb8/0x150 [ 28.890324] ? kernel_text_address+0xbd/0xf0 [ 28.894702] ? __kernel_text_address+0x9/0x30 [ 28.899170] ? __kernel_text_address+0x9/0x30 [ 28.903637] ? unwind_get_return_address+0x51/0x90 [ 28.908537] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.913872] ? __save_stack_trace+0xa0/0x160 [ 28.918254] __tipc_sendmsg+0xbab/0xf90 [ 28.922202] ? tipc_sendmcast+0xac0/0xac0 [ 28.926322] ? unwind_next_frame+0xe54/0x17d0 [ 28.930789] ? __save_stack_trace+0x63/0x160 [ 28.935168] ? deref_stack_reg+0x124/0x1a0 [ 28.939374] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 28.945230] ? lock_downgrade+0x740/0x740 [ 28.949351] ? unwind_next_frame+0xe54/0x17d0 [ 28.953818] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.959155] ? __lockdep_init_map+0x100/0x560 [ 28.963627] __tipc_sendstream+0x695/0x8c0 [ 28.967834] ? tipc_sendmsg+0x70/0x70 [ 28.971605] ? save_trace+0xd6/0x290 [ 28.975293] ? mark_lock+0x64e/0x1050 [ 28.979066] ? check_usage_forwards+0x2d0/0x2d0 [ 28.983708] tipc_send_packet+0x5a/0x90 [ 28.987654] ? tipc_wait_for_rcvmsg.isra.0+0x430/0x430 [ 28.992908] sock_sendmsg+0xb5/0x100 [ 28.996595] ___sys_sendmsg+0x6c8/0x800 [ 29.000540] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 29.005268] ? lock_downgrade+0x740/0x740 [ 29.009389] ? __lru_cache_add+0x178/0x250 [ 29.013596] ? do_raw_spin_unlock+0x164/0x220 [ 29.018063] ? _raw_spin_unlock+0x29/0x40 [ 29.022195] ? do_huge_pmd_anonymous_page+0x72e/0x1700 [ 29.027463] ? prep_transhuge_page+0xa0/0xa0 [ 29.031849] ? _raw_spin_unlock+0x29/0x40 [ 29.035975] ? __pmd_alloc+0x27f/0x3f0 [ 29.039923] ? lock_downgrade+0x740/0x740 [ 29.044042] ? vm_insert_page+0x7c0/0x7c0 [ 29.048160] ? __fdget+0x167/0x1f0 [ 29.051680] ? sockfd_lookup_light+0xb2/0x160 [ 29.056155] __sys_sendmsg+0xa3/0x120 [ 29.059930] ? SyS_shutdown+0x160/0x160 [ 29.063881] ? up_read+0x17/0x30 [ 29.067219] ? __do_page_fault+0x159/0xad0 [ 29.071425] SyS_sendmsg+0x27/0x40 [ 29.074936] ? __sys_sendmsg+0x120/0x120 [ 29.078974] do_syscall_64+0x1d5/0x640 [ 29.082836] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.088005] RIP: 0033:0x7f27cb440049 [ 29.091689] RSP: 002b:00007ffedad94158 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.099370] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f27cb440049 [ 29.106613] RDX: 0000000000000000 RSI: 0000000020001400 RDI: 0000000000000003 [ 29.113862] RBP: 00007f27cb404030 R08: 0000000000000000 R09: 0000000000000000 [ 29.121105] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f27cb4040c0 [ 29.128348] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 29.135771] Kernel Offset: disabled [ 29.139517] Rebooting in 86400 seconds..