INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-kasan-gce-386-4,10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.154985] ================================================================== [ 40.162403] BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x305b/0x3190 [ 40.169575] Read of size 4 at addr ffff8801ce117960 by task syzkaller973226/2985 [ 40.177077] [ 40.178679] CPU: 0 PID: 2985 Comm: syzkaller973226 Not tainted 4.14.0-rc2+ #16 [ 40.186008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.195332] Call Trace: [ 40.197890] dump_stack+0x194/0x257 [ 40.201493] ? arch_local_irq_restore+0x53/0x53 [ 40.206131] ? show_regs_print_info+0x65/0x65 [ 40.210599] ? lock_release+0xd70/0xd70 [ 40.214546] ? xfrm_state_find+0x305b/0x3190 [ 40.218928] print_address_description+0x73/0x250 [ 40.223742] ? xfrm_state_find+0x305b/0x3190 [ 40.228122] kasan_report+0x25b/0x340 [ 40.231897] __asan_report_load4_noabort+0x14/0x20 [ 40.236800] xfrm_state_find+0x305b/0x3190 [ 40.241011] ? __save_stack_trace+0x61/0xd0 [ 40.245322] ? xfrm_state_afinfo_get_rcu+0x160/0x160 [ 40.250401] ? copy_trace+0x1d0/0x1d0 [ 40.254186] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 40.259345] ? check_noncircular+0x20/0x20 [ 40.263552] ? lock_downgrade+0x990/0x990 [ 40.267680] ? find_held_lock+0x39/0x1d0 [ 40.271738] ? __lock_acquire+0x732/0x4620 [ 40.275944] ? find_held_lock+0x39/0x1d0 [ 40.279994] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 40.285158] ? depot_save_stack+0x1c2/0x490 [ 40.289459] ? do_raw_spin_trylock+0x190/0x190 [ 40.294015] ? check_noncircular+0x20/0x20 [ 40.298222] ? kernel_text_address+0x102/0x140 [ 40.302784] xfrm_tmpl_resolve+0x2fb/0xbd0 [ 40.307007] ? __xfrm_decode_session+0x100/0x100 [ 40.311741] ? lock_downgrade+0x990/0x990 [ 40.315860] ? inet_sendmsg+0x11f/0x5e0 [ 40.319807] ? sock_sendmsg+0xca/0x110 [ 40.323664] ? SYSC_sendto+0x358/0x5a0 [ 40.327527] ? check_noncircular+0x20/0x20 [ 40.331736] ? rt_add_uncached_list+0xa2/0x240 [ 40.336287] ? check_noncircular+0x20/0x20 [ 40.340499] xfrm_resolve_and_create_bundle+0x186/0x24b0 [ 40.345925] ? __lock_acquire+0x732/0x4620 [ 40.350156] ? xfrm_tmpl_resolve+0xbd0/0xbd0 [ 40.354539] ? lock_downgrade+0x990/0x990 [ 40.358658] ? dst_init+0x4d9/0x6a0 [ 40.362263] ? xfrm_selector_match+0xe00/0xe00 [ 40.366815] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 40.371979] ? lock_release+0xd70/0xd70 [ 40.375928] ? refcount_inc_not_zero+0xfe/0x180 [ 40.380589] ? xfrm_selector_match+0x3b/0xe00 [ 40.385061] ? xfrm_sk_policy_lookup+0x2cf/0x3d0 [ 40.389795] ? xfrm_selector_match+0xe00/0xe00 [ 40.394354] ? check_noncircular+0x20/0x20 [ 40.398564] ? ip_route_output_key_hash_rcu+0x604/0x2c20 [ 40.403990] xfrm_lookup+0xf0a/0x2540 [ 40.407761] ? xfrm_lookup+0xf0a/0x2540 [ 40.411709] ? ip_route_input_noref+0x1e0/0x1e0 [ 40.416357] ? xfrm_policy_lookup_bytype.constprop.49+0x16f0/0x16f0 [ 40.422738] ? find_held_lock+0x39/0x1d0 [ 40.426781] ? lock_downgrade+0x990/0x990 [ 40.430907] ? ip_route_output_key_hash+0x1a6/0x370 [ 40.435894] ? find_held_lock+0x39/0x1d0 [ 40.439930] ? lock_release+0xd70/0xd70 [ 40.443881] ? lock_downgrade+0x990/0x990 [ 40.448013] ? ip_route_output_key_hash+0x252/0x370 [ 40.453006] ? ip_route_output_key_hash_rcu+0x2c20/0x2c20 [ 40.458513] ? lock_release+0xd70/0xd70 [ 40.462467] xfrm_lookup_route+0x39/0x1a0 [ 40.466591] ip_route_output_flow+0x7c/0xa0 [ 40.470884] raw_sendmsg+0xc4f/0x38c0 [ 40.474673] ? raw_setsockopt+0xd0/0xd0 [ 40.478621] ? get_mem_cgroup_from_mm+0x49b/0x710 [ 40.483444] ? lock_page_memcg+0x3b0/0x3b0 [ 40.487655] ? __lock_is_held+0xbc/0x140 [ 40.491696] ? lru_cache_add+0x1c7/0x3a0 [ 40.495726] ? get_mem_cgroup_from_mm+0x710/0x710 [ 40.500540] ? lru_cache_add_file+0x20/0x20 [ 40.504851] ? lock_downgrade+0x990/0x990 [ 40.508980] ? __might_fault+0xe0/0x1d0 [ 40.512925] ? sock_has_perm+0x29c/0x400 [ 40.516959] ? selinux_tun_dev_create+0xc0/0xc0 [ 40.521598] ? lock_release+0xd70/0xd70 [ 40.525542] ? check_same_owner+0x320/0x320 [ 40.529835] ? __check_object_size+0x25d/0x4f0 [ 40.534407] inet_sendmsg+0x11f/0x5e0 [ 40.538179] ? __might_sleep+0x95/0x190 [ 40.542126] ? inet_recvmsg+0x5f0/0x5f0 [ 40.546074] ? selinux_socket_sendmsg+0x36/0x40 [ 40.550716] ? security_socket_sendmsg+0x89/0xb0 [ 40.555445] ? inet_recvmsg+0x5f0/0x5f0 [ 40.559398] sock_sendmsg+0xca/0x110 [ 40.563087] SYSC_sendto+0x358/0x5a0 [ 40.566774] ? SYSC_connect+0x480/0x480 [ 40.570721] ? find_held_lock+0x39/0x1d0 [ 40.574765] ? lock_downgrade+0x990/0x990 [ 40.578909] ? handle_mm_fault+0x410/0x8d0 [ 40.583114] ? down_read_trylock+0xdb/0x170 [ 40.587416] ? __do_page_fault+0x2b8/0xb60 [ 40.591650] ? __handle_mm_fault+0x39c0/0x39c0 [ 40.596217] ? vmacache_find+0x5f/0x280 [ 40.600179] SyS_sendto+0x40/0x50 [ 40.603620] ? SyS_getpeername+0x30/0x30 [ 40.607680] do_fast_syscall_32+0x3f2/0xf05 [ 40.611990] ? do_int80_syscall_32+0x940/0x940 [ 40.616561] ? kasan_check_read+0x11/0x20 [ 40.620705] ? syscall_return_slowpath+0x510/0x510 [ 40.625628] ? SyS_rt_sigaction+0x94/0x1b0 [ 40.629843] ? lockdep_sys_exit+0x47/0xf0 [ 40.633967] ? retint_user+0x18/0x20 [ 40.637678] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.642524] entry_SYSENTER_compat+0x51/0x60 [ 40.646917] RIP: 0023:0xf7f0cc79 [ 40.650256] RSP: 002b:00000000ff92c79c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 40.657946] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020fdbfc0 [ 40.665199] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020fdbff0 [ 40.672462] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 [ 40.679736] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 40.686997] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 40.694267] [ 40.695882] The buggy address belongs to the page: [ 40.700829] page:ffffea00073845c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 40.708951] flags: 0x200000000000000() [ 40.712815] raw: 0200000000000000 0000000000000000 0000000000000000 00000000ffffffff [ 40.720669] raw: 0000000000000000 0000000100000001 0000000000000000 0000000000000000 [ 40.728527] page dumped because: kasan: bad access detected [ 40.734216] [ 40.735818] Memory state around the buggy address: [ 40.740720] ffff8801ce117800: f2 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 f2 f2 f2 f2 [ 40.748053] ffff8801ce117880: f2 00 00 00 00 f2 f2 f2 f2 00 00 00 00 00 00 f2 [ 40.755389] >ffff8801ce117900: f2 f2 f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 [ 40.762726] ^ [ 40.769191] ffff8801ce117980: f2 00 00 00 00 00 00 00 00 00 f2 f2 f2 f3 f3 f3 [ 40.776544] ffff8801ce117a00: f3 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 [ 40.783889] ================================================================== [ 40.791217] Disabling lock debugging due to kernel taint [ 40.796707] Kernel panic - not syncing: panic_on_warn set ... [ 40.796707] [ 40.804219] CPU: 0 PID: 2985 Comm: syzkaller973226 Tainted: G B 4.14.0-rc2+ #16 [ 40.812760] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.822085] Call Trace: [ 40.824648] dump_stack+0x194/0x257 [ 40.828248] ? arch_local_irq_restore+0x53/0x53 [ 40.832890] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 40.837623] ? xfrm_state_find+0x2fc0/0x3190 [ 40.842004] panic+0x1e4/0x417 [ 40.845180] ? __warn+0x1d9/0x1d9 [ 40.848620] ? xfrm_state_find+0x305b/0x3190 [ 40.853002] kasan_end_report+0x50/0x50 [ 40.856945] kasan_report+0x144/0x340 [ 40.860715] __asan_report_load4_noabort+0x14/0x20 [ 40.865616] xfrm_state_find+0x305b/0x3190 [ 40.869828] ? __save_stack_trace+0x61/0xd0 [ 40.874131] ? xfrm_state_afinfo_get_rcu+0x160/0x160 [ 40.879209] ? copy_trace+0x1d0/0x1d0 [ 40.882982] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 40.888140] ? check_noncircular+0x20/0x20 [ 40.892342] ? lock_downgrade+0x990/0x990 [ 40.896469] ? find_held_lock+0x39/0x1d0 [ 40.900521] ? __lock_acquire+0x732/0x4620 [ 40.904738] ? find_held_lock+0x39/0x1d0 [ 40.908792] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 40.913958] ? depot_save_stack+0x1c2/0x490 [ 40.918256] ? do_raw_spin_trylock+0x190/0x190 [ 40.922814] ? check_noncircular+0x20/0x20 [ 40.927024] ? kernel_text_address+0x102/0x140 [ 40.931580] xfrm_tmpl_resolve+0x2fb/0xbd0 [ 40.935795] ? __xfrm_decode_session+0x100/0x100 [ 40.940533] ? lock_downgrade+0x990/0x990 [ 40.944663] ? inet_sendmsg+0x11f/0x5e0 [ 40.948617] ? sock_sendmsg+0xca/0x110 [ 40.952483] ? SYSC_sendto+0x358/0x5a0 [ 40.956348] ? check_noncircular+0x20/0x20 [ 40.960555] ? rt_add_uncached_list+0xa2/0x240 [ 40.965112] ? check_noncircular+0x20/0x20 [ 40.969320] xfrm_resolve_and_create_bundle+0x186/0x24b0 [ 40.974743] ? __lock_acquire+0x732/0x4620 [ 40.978961] ? xfrm_tmpl_resolve+0xbd0/0xbd0 [ 40.983339] ? lock_downgrade+0x990/0x990 [ 40.987461] ? dst_init+0x4d9/0x6a0 [ 40.991066] ? xfrm_selector_match+0xe00/0xe00 [ 40.995635] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 41.000796] ? lock_release+0xd70/0xd70 [ 41.004740] ? refcount_inc_not_zero+0xfe/0x180 [ 41.009381] ? xfrm_selector_match+0x3b/0xe00 [ 41.013848] ? xfrm_sk_policy_lookup+0x2cf/0x3d0 [ 41.018589] ? xfrm_selector_match+0xe00/0xe00 [ 41.023139] ? check_noncircular+0x20/0x20 [ 41.027344] ? ip_route_output_key_hash_rcu+0x604/0x2c20 [ 41.032765] xfrm_lookup+0xf0a/0x2540 [ 41.036530] ? xfrm_lookup+0xf0a/0x2540 [ 41.040479] ? ip_route_input_noref+0x1e0/0x1e0 [ 41.045119] ? xfrm_policy_lookup_bytype.constprop.49+0x16f0/0x16f0 [ 41.051503] ? find_held_lock+0x39/0x1d0 [ 41.055537] ? lock_downgrade+0x990/0x990 [ 41.059655] ? ip_route_output_key_hash+0x1a6/0x370 [ 41.064637] ? find_held_lock+0x39/0x1d0 [ 41.068664] ? lock_release+0xd70/0xd70 [ 41.072605] ? lock_downgrade+0x990/0x990 [ 41.076726] ? ip_route_output_key_hash+0x252/0x370 [ 41.081706] ? ip_route_output_key_hash_rcu+0x2c20/0x2c20 [ 41.087207] ? lock_release+0xd70/0xd70 [ 41.091151] xfrm_lookup_route+0x39/0x1a0 [ 41.095265] ip_route_output_flow+0x7c/0xa0 [ 41.099552] raw_sendmsg+0xc4f/0x38c0 [ 41.103324] ? raw_setsockopt+0xd0/0xd0 [ 41.107263] ? get_mem_cgroup_from_mm+0x49b/0x710 [ 41.112074] ? lock_page_memcg+0x3b0/0x3b0 [ 41.116274] ? __lock_is_held+0xbc/0x140 [ 41.120302] ? lru_cache_add+0x1c7/0x3a0 [ 41.124326] ? get_mem_cgroup_from_mm+0x710/0x710 [ 41.129132] ? lru_cache_add_file+0x20/0x20 [ 41.133430] ? lock_downgrade+0x990/0x990 [ 41.137549] ? __might_fault+0xe0/0x1d0 [ 41.141490] ? sock_has_perm+0x29c/0x400 [ 41.145517] ? selinux_tun_dev_create+0xc0/0xc0 [ 41.150150] ? lock_release+0xd70/0xd70 [ 41.154088] ? check_same_owner+0x320/0x320