[ 38.700165] do_idle+0x24e/0x3b0 [ 38.703497] cpu_startup_entry+0x18/0x20 [ 38.707524] rest_init+0xed/0xf0 [ 38.710856] start_kernel+0x72e/0x754 [ 38.714618] ? mem_encrypt_init+0xb/0xb [ 38.718556] ? x86_family+0x32/0x40 [ 38.722147] ? load_ucode_bsp+0x1ea/0x1f6 [ 38.726259] x86_64_start_reservations+0x2a/0x2c [ 38.730979] x86_64_start_kernel+0x77/0x7a [ 38.735177] secondary_startup_64+0xa5/0xa5 Warning: Permanently added 'ci-upstream-net-kasan-gce-3,10.128.0.61' (ECDSA) to the list of known hosts. executing program [ 44.677279] ================================================================== [ 44.684651] BUG: KASAN: use-after-free in tipc_group_self+0x1a2/0x1b0 [ 44.691192] Read of size 4 at addr ffff8801d842306c by task syzkaller803098/2985 [ 44.698687] [ 44.700280] CPU: 1 PID: 2985 Comm: syzkaller803098 Not tainted 4.14.0-rc5+ #88 [ 44.707599] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.716928] Call Trace: [ 44.719481] dump_stack+0x194/0x257 [ 44.723073] ? arch_local_irq_restore+0x53/0x53 [ 44.727703] ? show_regs_print_info+0x65/0x65 [ 44.732163] ? tipc_group_self+0x1a2/0x1b0 [ 44.736366] print_address_description+0x73/0x250 [ 44.741172] ? tipc_group_self+0x1a2/0x1b0 [ 44.745374] kasan_report+0x25b/0x340 [ 44.749142] __asan_report_load4_noabort+0x14/0x20 [ 44.754033] tipc_group_self+0x1a2/0x1b0 [ 44.758063] tipc_sk_leave+0xfc/0x200 [ 44.761828] ? tipc_sk_withdraw+0x6b0/0x6b0 [ 44.766115] ? lock_sock_nested+0x44/0x110 [ 44.770314] ? lock_sock_nested+0x91/0x110 [ 44.774513] ? trace_hardirqs_on+0xd/0x10 [ 44.778627] ? __local_bh_enable_ip+0x9d/0x160 [ 44.783175] tipc_release+0x154/0xfe0 [ 44.786941] ? lock_acquire+0x1d5/0x580 [ 44.790879] ? lock_acquire+0x1d5/0x580 [ 44.794818] ? mntput_no_expire+0x130/0xa90 [ 44.799106] ? tipc_sk_backlog_rcv+0x370/0x370 [ 44.803652] ? lock_release+0xa40/0xa40 [ 44.807595] ? trace_hardirqs_on+0xd/0x10 [ 44.811706] ? kmem_cache_free+0x21b/0x280 [ 44.815910] ? dentry_free+0xd2/0x130 [ 44.819680] ? locks_remove_file+0x3fa/0x5a0 [ 44.824052] ? fcntl_setlk+0x10c0/0x10c0 [ 44.828076] ? mnt_get_count+0x150/0x150 [ 44.832100] ? __fsnotify_parent+0xb4/0x3a0 [ 44.836386] ? fsnotify+0x1af0/0x1af0 [ 44.840150] ? dput.part.24+0x2a/0x740 [ 44.844003] sock_release+0x8d/0x1e0 [ 44.847683] ? sock_release+0x1e0/0x1e0 [ 44.851619] sock_close+0x16/0x20 [ 44.855038] __fput+0x327/0x7e0 [ 44.858283] ? fput+0x140/0x140 [ 44.861526] ? check_same_owner+0x320/0x320 [ 44.865810] ? do_raw_spin_trylock+0x190/0x190 [ 44.870373] ____fput+0x15/0x20 [ 44.873618] task_work_run+0x199/0x270 [ 44.877470] ? task_work_cancel+0x210/0x210 [ 44.881757] ? _raw_spin_unlock+0x22/0x30 [ 44.885871] ? switch_task_namespaces+0x87/0xc0 [ 44.890507] do_exit+0x9b5/0x1ad0 [ 44.893928] ? tipc_accept_from_sock+0x541/0x580 [ 44.898645] ? mm_update_next_owner+0x930/0x930 [ 44.903277] ? tipc_accept_from_sock+0x580/0x580 [ 44.908002] ? trace_hardirqs_off+0xd/0x10 [ 44.912203] ? release_sock+0x1d4/0x2a0 [ 44.916141] ? lock_downgrade+0x990/0x990 [ 44.920254] ? lock_downgrade+0x990/0x990 [ 44.924364] ? do_raw_spin_trylock+0x190/0x190 [ 44.928910] ? tipc_group_delete+0x2c0/0x3c0 [ 44.933285] ? lock_release+0x9e0/0xa40 [ 44.937228] ? trace_hardirqs_on+0xd/0x10 [ 44.941338] ? __local_bh_enable_ip+0x9d/0x160 [ 44.945886] ? release_sock+0x1d4/0x2a0 [ 44.949828] ? tipc_nametbl_build_group+0x27a/0x370 [ 44.954814] ? tipc_setsockopt+0x703/0xc00 [ 44.959013] ? tipc_sk_leave+0x200/0x200 [ 44.963049] ? security_socket_setsockopt+0x89/0xb0 [ 44.968045] ? SyS_setsockopt+0x215/0x360 [ 44.972160] do_group_exit+0x149/0x400 [ 44.976010] ? SyS_recv+0x40/0x40 [ 44.979429] ? SyS_exit+0x30/0x30 [ 44.982846] ? perf_trace_sys_enter+0xc20/0xc20 [ 44.987483] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 44.992202] SyS_exit_group+0x1d/0x20 [ 44.995968] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.000689] RIP: 0033:0x43e978 [ 45.003843] RSP: 002b:00007fff75414448 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.011516] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e978 [ 45.018750] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.026009] RBP: 00000000006ca018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.033251] R10: 0000000020001fe4 R11: 0000000000000246 R12: 00000000004016a0 [ 45.040484] R13: 0000000000401730 R14: 0000000000000000 R15: 0000000000000000 [ 45.047727] [ 45.049321] Allocated by task 2985: [ 45.052914] save_stack_trace+0x16/0x20 [ 45.056849] save_stack+0x43/0xd0 [ 45.060265] kasan_kmalloc+0xad/0xe0 [ 45.063945] kmem_cache_alloc_trace+0x136/0x750 [ 45.068575] tipc_group_create+0x116/0x9c0 [ 45.072773] tipc_setsockopt+0x25e/0xc00 [ 45.076797] SyS_setsockopt+0x189/0x360 [ 45.080733] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.085450] [ 45.087041] Freed by task 2985: [ 45.090282] save_stack_trace+0x16/0x20 [ 45.094219] save_stack+0x43/0xd0 [ 45.097634] kasan_slab_free+0x71/0xc0 [ 45.101484] kfree+0xca/0x250 [ 45.104552] tipc_group_delete+0x2c0/0x3c0 [ 45.108750] tipc_setsockopt+0xb33/0xc00 [ 45.112775] SyS_setsockopt+0x189/0x360 [ 45.116711] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.121425] [ 45.123019] The buggy address belongs to the object at ffff8801d8423000 [ 45.123019] which belongs to the cache kmalloc-192 of size 192 [ 45.135637] The buggy address is located 108 bytes inside of [ 45.135637] 192-byte region [ffff8801d8423000, ffff8801d84230c0) [ 45.147471] The buggy address belongs to the page: [ 45.152364] page:ffffea00076108c0 count:1 mapcount:0 mapping:ffff8801d8423000 index:0xffff8801d8423800 [ 45.161771] flags: 0x200000000000100(slab) [ 45.165969] raw: 0200000000000100 ffff8801d8423000 ffff8801d8423800 0000000100000008 [ 45.173811] raw: ffffea00076b6620 ffff8801dac01138 ffff8801dac00040 0000000000000000 [ 45.181653] page dumped because: kasan: bad access detected [ 45.187323] [ 45.188915] Memory state around the buggy address: [ 45.193807] ffff8801d8422f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.201129] ffff8801d8422f80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 45.208449] >ffff8801d8423000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.215770] ^ [ 45.222482] ffff8801d8423080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 45.229804] ffff8801d8423100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.237123] ================================================================== [ 45.244619] Kernel panic - not syncing: panic_on_warn set ... [ 45.244619] [ 45.251950] CPU: 1 PID: 2985 Comm: syzkaller803098 Tainted: G B 4.14.0-rc5+ #88 [ 45.260486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.269801] Call Trace: [ 45.272354] dump_stack+0x194/0x257 [ 45.275948] ? arch_local_irq_restore+0x53/0x53 [ 45.280583] ? kasan_end_report+0x32/0x50 [ 45.284695] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.289417] ? tipc_group_self+0xc0/0x1b0 [ 45.293529] panic+0x1e4/0x417 [ 45.296683] ? __warn+0x1d9/0x1d9 [ 45.300106] ? tipc_group_self+0x1a2/0x1b0 [ 45.304302] kasan_end_report+0x50/0x50 [ 45.308237] kasan_report+0x144/0x340 [ 45.312024] __asan_report_load4_noabort+0x14/0x20 [ 45.316916] tipc_group_self+0x1a2/0x1b0 [ 45.320940] tipc_sk_leave+0xfc/0x200 [ 45.324703] ? tipc_sk_withdraw+0x6b0/0x6b0 [ 45.328992] ? lock_sock_nested+0x44/0x110 [ 45.333658] ? lock_sock_nested+0x91/0x110 [ 45.337859] ? trace_hardirqs_on+0xd/0x10 [ 45.341968] ? __local_bh_enable_ip+0x9d/0x160 [ 45.346518] tipc_release+0x154/0xfe0 [ 45.350284] ? lock_acquire+0x1d5/0x580 [ 45.354223] ? lock_acquire+0x1d5/0x580 [ 45.358163] ? mntput_no_expire+0x130/0xa90 [ 45.362448] ? tipc_sk_backlog_rcv+0x370/0x370 [ 45.366996] ? lock_release+0xa40/0xa40 [ 45.370937] ? trace_hardirqs_on+0xd/0x10 [ 45.375049] ? kmem_cache_free+0x21b/0x280 [ 45.379249] ? dentry_free+0xd2/0x130 [ 45.383020] ? locks_remove_file+0x3fa/0x5a0 [ 45.387394] ? fcntl_setlk+0x10c0/0x10c0 [ 45.391417] ? mnt_get_count+0x150/0x150 [ 45.395442] ? __fsnotify_parent+0xb4/0x3a0 [ 45.399728] ? fsnotify+0x1af0/0x1af0 [ 45.403490] ? dput.part.24+0x2a/0x740 [ 45.407345] sock_release+0x8d/0x1e0 [ 45.411024] ? sock_release+0x1e0/0x1e0 [ 45.414960] sock_close+0x16/0x20 [ 45.418376] __fput+0x327/0x7e0 [ 45.421622] ? fput+0x140/0x140 [ 45.424875] ? check_same_owner+0x320/0x320 [ 45.429158] ? do_raw_spin_trylock+0x190/0x190 [ 45.433703] ____fput+0x15/0x20 [ 45.436946] task_work_run+0x199/0x270 [ 45.440796] ? task_work_cancel+0x210/0x210 [ 45.445082] ? _raw_spin_unlock+0x22/0x30 [ 45.449195] ? switch_task_namespaces+0x87/0xc0 [ 45.453830] do_exit+0x9b5/0x1ad0 [ 45.457250] ? tipc_accept_from_sock+0x541/0x580 [ 45.461969] ? mm_update_next_owner+0x930/0x930 [ 45.466605] ? tipc_accept_from_sock+0x580/0x580 [ 45.471331] ? trace_hardirqs_off+0xd/0x10 [ 45.475527] ? release_sock+0x1d4/0x2a0 [ 45.479464] ? lock_downgrade+0x990/0x990 [ 45.483573] ? lock_downgrade+0x990/0x990 [ 45.487684] ? do_raw_spin_trylock+0x190/0x190 [ 45.492229] ? tipc_group_delete+0x2c0/0x3c0 [ 45.496599] ? lock_release+0x9e0/0xa40 [ 45.500536] ? trace_hardirqs_on+0xd/0x10 [ 45.504648] ? __local_bh_enable_ip+0x9d/0x160 [ 45.509195] ? release_sock+0x1d4/0x2a0 [ 45.513136] ? tipc_nametbl_build_group+0x27a/0x370 [ 45.518116] ? tipc_setsockopt+0x703/0xc00 [ 45.522316] ? tipc_sk_leave+0x200/0x200 [ 45.526346] ? security_socket_setsockopt+0x89/0xb0 [ 45.531327] ? SyS_setsockopt+0x215/0x360 [ 45.535447] do_group_exit+0x149/0x400 [ 45.539296] ? SyS_recv+0x40/0x40 [ 45.542711] ? SyS_exit+0x30/0x30 [ 45.546128] ? perf_trace_sys_enter+0xc20/0xc20 [ 45.550758] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.555479] SyS_exit_group+0x1d/0x20 [ 45.559241] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 45.563962] RIP: 0033:0x43e978 [ 45.567117] RSP: 002b:00007fff75414448 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.574785] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e978 [ 45.582018] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.589250] RBP: 00000000006ca018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.596486] R10: 0000000020001fe4 R11: 0000000000000246 R12: 00000000004016a0 [ 45.603720] R13: 0000000000401730 R14: 0000000000000000 R15: 0000000000000000 [ 45.611332] Dumping ftrace buffer: [ 45.614846] (ftrace buffer empty) [ 45.618520] Kernel Offset: disabled [ 45.622112] Rebooting in 86400 seconds..