[ 27.508215] ? trace_hardirqs_on+0xd/0x10 [ 27.512328] default_idle+0xbf/0x460 [ 27.516005] ? __sched_text_end+0x4/0x4 [ 27.519949] arch_cpu_idle+0xa/0x10 [ 27.523541] default_idle_call+0x36/0x90 [ 27.527566] do_idle+0x24e/0x3b0 [ 27.530893] ? complete+0x6a/0x80 [ 27.534311] cpu_startup_entry+0x18/0x20 [ 27.538343] start_secondary+0x2ea/0x3f0 [ 27.542371] secondary_startup_64+0xa5/0xa5 Warning: Permanently added 'ci-upstream-net-kasan-gce-3,10.128.0.10' (ECDSA) to the list of known hosts. executing program [ 33.492506] ================================================================== [ 33.499887] BUG: KASAN: use-after-free in tipc_group_self+0x1a2/0x1b0 [ 33.506433] Read of size 4 at addr ffff8801d836f56c by task syzkaller275684/3002 [ 33.513927] [ 33.515523] CPU: 1 PID: 3002 Comm: syzkaller275684 Not tainted 4.14.0-rc4+ #84 [ 33.522844] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.532165] Call Trace: [ 33.534722] dump_stack+0x194/0x257 [ 33.538317] ? arch_local_irq_restore+0x53/0x53 [ 33.542953] ? show_regs_print_info+0x65/0x65 [ 33.547415] ? lock_sock_nested+0xa3/0x110 [ 33.551616] ? tipc_group_self+0x1a2/0x1b0 [ 33.555817] print_address_description+0x73/0x250 [ 33.560624] ? tipc_group_self+0x1a2/0x1b0 [ 33.564824] kasan_report+0x25b/0x340 [ 33.568591] __asan_report_load4_noabort+0x14/0x20 [ 33.573485] tipc_group_self+0x1a2/0x1b0 [ 33.577513] tipc_sk_leave+0xfc/0x200 [ 33.581279] ? tipc_sk_withdraw+0x6b0/0x6b0 [ 33.585566] ? lock_sock_nested+0x44/0x110 [ 33.589766] ? lock_sock_nested+0x91/0x110 [ 33.593964] ? trace_hardirqs_on+0xd/0x10 [ 33.598077] ? __local_bh_enable_ip+0x9d/0x160 [ 33.602626] tipc_release+0x154/0xfd0 [ 33.606392] ? lock_acquire+0x1d5/0x580 [ 33.610331] ? mnt_get_count+0x150/0x150 [ 33.614359] ? tipc_sk_backlog_rcv+0x370/0x370 [ 33.618910] ? lock_release+0xd70/0xd70 [ 33.622856] ? trace_hardirqs_on+0xd/0x10 [ 33.626971] ? kmem_cache_free+0x21b/0x280 [ 33.631171] ? dentry_free+0xd2/0x130 [ 33.634940] ? locks_remove_file+0x3fa/0x5a0 [ 33.639316] ? fcntl_setlk+0x10d0/0x10d0 [ 33.643342] ? mnt_get_count+0x150/0x150 [ 33.647370] ? __fsnotify_parent+0xb4/0x3a0 [ 33.651658] ? fsnotify+0x1af0/0x1af0 [ 33.655422] ? dput.part.24+0x2a/0x740 [ 33.659278] sock_release+0x8d/0x1e0 [ 33.662958] ? sock_release+0x1e0/0x1e0 [ 33.666897] sock_close+0x16/0x20 [ 33.670316] __fput+0x333/0x7f0 [ 33.673565] ? fput+0x140/0x140 [ 33.676810] ? check_same_owner+0x320/0x320 [ 33.681096] ? do_raw_spin_trylock+0x190/0x190 [ 33.685644] ____fput+0x15/0x20 [ 33.688890] task_work_run+0x199/0x270 [ 33.692745] ? task_work_cancel+0x210/0x210 [ 33.697031] ? _raw_spin_unlock+0x22/0x30 [ 33.701146] ? switch_task_namespaces+0x87/0xc0 [ 33.705783] do_exit+0x9d2/0x1af0 [ 33.709203] ? tipc_accept_from_sock+0x531/0x580 [ 33.713923] ? mm_update_next_owner+0x930/0x930 [ 33.718559] ? release_sock+0x1d4/0x2a0 [ 33.722499] ? lock_downgrade+0x990/0x990 [ 33.726613] ? lock_downgrade+0x990/0x990 [ 33.730727] ? lock_acquire+0x1d5/0x580 [ 33.734667] ? release_sock+0x74/0x2a0 [ 33.738523] ? do_raw_spin_trylock+0x190/0x190 [ 33.743070] ? tipc_group_delete+0x2c0/0x3c0 [ 33.747446] ? lock_release+0xcb0/0xd70 [ 33.751388] ? trace_hardirqs_on+0xd/0x10 [ 33.755502] ? __local_bh_enable_ip+0x9d/0x160 [ 33.760050] ? release_sock+0x1d4/0x2a0 [ 33.763999] ? tipc_nametbl_build_group+0x27a/0x370 [ 33.768984] ? tipc_setsockopt+0x703/0xc00 [ 33.773187] ? tipc_sk_leave+0x200/0x200 [ 33.777220] ? security_socket_setsockopt+0x89/0xb0 [ 33.782206] ? SyS_setsockopt+0x215/0x360 [ 33.786320] do_group_exit+0x149/0x400 [ 33.790171] ? SyS_recv+0x40/0x40 [ 33.793589] ? SyS_exit+0x30/0x30 [ 33.797010] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.801739] SyS_exit_group+0x1d/0x20 [ 33.805512] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 33.810238] RIP: 0033:0x43e978 [ 33.813395] RSP: 002b:00007ffc007fceb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 33.821070] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e978 [ 33.828306] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 33.835542] RBP: 00000000006ca018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 33.842779] R10: 0000000020b27000 R11: 0000000000000246 R12: 00000000004016a0 [ 33.850018] R13: 0000000000401730 R14: 0000000000000000 R15: 0000000000000000 [ 33.857262] [ 33.858858] Allocated by task 3002: [ 33.862470] save_stack_trace+0x16/0x20 [ 33.866408] save_stack+0x43/0xd0 [ 33.869824] kasan_kmalloc+0xad/0xe0 [ 33.873503] kmem_cache_alloc_trace+0x136/0x750 [ 33.878136] tipc_group_create+0x116/0x9c0 [ 33.882338] tipc_setsockopt+0x25e/0xc00 [ 33.886363] SyS_setsockopt+0x189/0x360 [ 33.890302] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 33.895019] [ 33.896611] Freed by task 3002: [ 33.899853] save_stack_trace+0x16/0x20 [ 33.903793] save_stack+0x43/0xd0 [ 33.907220] kasan_slab_free+0x71/0xc0 [ 33.911072] kfree+0xca/0x250 [ 33.914142] tipc_group_delete+0x2c0/0x3c0 [ 33.918339] tipc_setsockopt+0xb33/0xc00 [ 33.922364] SyS_setsockopt+0x189/0x360 [ 33.926302] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 33.931020] [ 33.932617] The buggy address belongs to the object at ffff8801d836f500 [ 33.932617] which belongs to the cache kmalloc-192 of size 192 [ 33.945235] The buggy address is located 108 bytes inside of [ 33.945235] 192-byte region [ffff8801d836f500, ffff8801d836f5c0) [ 33.957071] The buggy address belongs to the page: [ 33.961966] page:ffffea000760dbc0 count:1 mapcount:0 mapping:ffff8801d836f000 index:0xffff8801d836f300 [ 33.971374] flags: 0x200000000000100(slab) [ 33.975575] raw: 0200000000000100 ffff8801d836f000 ffff8801d836f300 000000010000000a [ 33.983423] raw: ffffea00075edee0 ffffea000760d9a0 ffff8801dac00040 0000000000000000 [ 33.991265] page dumped because: kasan: bad access detected [ 33.996936] [ 33.998528] Memory state around the buggy address: [ 34.003420] ffff8801d836f400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.010745] ffff8801d836f480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.018069] >ffff8801d836f500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.025391] ^ [ 34.032109] ffff8801d836f580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.039435] ffff8801d836f600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.046756] ================================================================== [ 34.054143] Kernel panic - not syncing: panic_on_warn set ... [ 34.054143] [ 34.061478] CPU: 1 PID: 3002 Comm: syzkaller275684 Tainted: G B 4.14.0-rc4+ #84 [ 34.070017] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.079338] Call Trace: [ 34.081895] dump_stack+0x194/0x257 [ 34.085490] ? arch_local_irq_restore+0x53/0x53 [ 34.090138] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.094866] ? tipc_group_self+0x190/0x1b0 [ 34.099066] panic+0x1e4/0x417 [ 34.102225] ? __warn+0x1d9/0x1d9 [ 34.105650] ? tipc_group_self+0x1a2/0x1b0 [ 34.109849] kasan_end_report+0x50/0x50 [ 34.113793] kasan_report+0x144/0x340 [ 34.117559] __asan_report_load4_noabort+0x14/0x20 [ 34.122454] tipc_group_self+0x1a2/0x1b0 [ 34.126482] tipc_sk_leave+0xfc/0x200 [ 34.130250] ? tipc_sk_withdraw+0x6b0/0x6b0 [ 34.134540] ? lock_sock_nested+0x44/0x110 [ 34.138741] ? lock_sock_nested+0x91/0x110 [ 34.142942] ? trace_hardirqs_on+0xd/0x10 [ 34.147054] ? __local_bh_enable_ip+0x9d/0x160 [ 34.151603] tipc_release+0x154/0xfd0 [ 34.155371] ? lock_acquire+0x1d5/0x580 [ 34.159310] ? mnt_get_count+0x150/0x150 [ 34.163338] ? tipc_sk_backlog_rcv+0x370/0x370 [ 34.167885] ? lock_release+0xd70/0xd70 [ 34.171826] ? trace_hardirqs_on+0xd/0x10 [ 34.175939] ? kmem_cache_free+0x21b/0x280 [ 34.180144] ? dentry_free+0xd2/0x130 [ 34.183919] ? locks_remove_file+0x3fa/0x5a0 [ 34.188296] ? fcntl_setlk+0x10d0/0x10d0 [ 34.192323] ? mnt_get_count+0x150/0x150 [ 34.196348] ? __fsnotify_parent+0xb4/0x3a0 [ 34.200635] ? fsnotify+0x1af0/0x1af0 [ 34.204401] ? dput.part.24+0x2a/0x740 [ 34.208258] sock_release+0x8d/0x1e0 [ 34.211937] ? sock_release+0x1e0/0x1e0 [ 34.215874] sock_close+0x16/0x20 [ 34.219294] __fput+0x333/0x7f0 [ 34.222541] ? fput+0x140/0x140 [ 34.225788] ? check_same_owner+0x320/0x320 [ 34.230076] ? do_raw_spin_trylock+0x190/0x190 [ 34.234627] ____fput+0x15/0x20 [ 34.237871] task_work_run+0x199/0x270 [ 34.241725] ? task_work_cancel+0x210/0x210 [ 34.246014] ? _raw_spin_unlock+0x22/0x30 [ 34.250132] ? switch_task_namespaces+0x87/0xc0 [ 34.254773] do_exit+0x9d2/0x1af0 [ 34.258197] ? tipc_accept_from_sock+0x531/0x580 [ 34.262925] ? mm_update_next_owner+0x930/0x930 [ 34.267563] ? release_sock+0x1d4/0x2a0 [ 34.271514] ? lock_downgrade+0x990/0x990 [ 34.275628] ? lock_downgrade+0x990/0x990 [ 34.279744] ? lock_acquire+0x1d5/0x580 [ 34.283683] ? release_sock+0x74/0x2a0 [ 34.287541] ? do_raw_spin_trylock+0x190/0x190 [ 34.292092] ? tipc_group_delete+0x2c0/0x3c0 [ 34.296470] ? lock_release+0xcb0/0xd70 [ 34.300410] ? trace_hardirqs_on+0xd/0x10 [ 34.304523] ? __local_bh_enable_ip+0x9d/0x160 [ 34.309071] ? release_sock+0x1d4/0x2a0 [ 34.313015] ? tipc_nametbl_build_group+0x27a/0x370 [ 34.318002] ? tipc_setsockopt+0x703/0xc00 [ 34.322204] ? tipc_sk_leave+0x200/0x200 [ 34.326239] ? security_socket_setsockopt+0x89/0xb0 [ 34.331224] ? SyS_setsockopt+0x215/0x360 [ 34.335338] do_group_exit+0x149/0x400 [ 34.339190] ? SyS_recv+0x40/0x40 [ 34.342608] ? SyS_exit+0x30/0x30 [ 34.346031] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 34.350752] SyS_exit_group+0x1d/0x20 [ 34.354518] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 34.359239] RIP: 0033:0x43e978 [ 34.362395] RSP: 002b:00007ffc007fceb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 34.370069] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043e978 [ 34.377305] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 34.384541] RBP: 00000000006ca018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 34.391778] R10: 0000000020b27000 R11: 0000000000000246 R12: 00000000004016a0 [ 34.399012] R13: 0000000000401730 R14: 0000000000000000 R15: 0000000000000000 [ 34.406292] Dumping ftrace buffer: [ 34.409903] (ftrace buffer empty) [ 34.413579] Kernel Offset: disabled [ 34.417177] Rebooting in 86400 seconds..