Warning: Permanently added '10.128.0.126' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 54.405992][ T6883] ================================================================== [ 54.414247][ T6883] BUG: KASAN: use-after-free in tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 54.422859][ T6883] Read of size 2 at addr ffff8880a756b414 by task syz-executor748/6883 [ 54.431333][ T6883] [ 54.433651][ T6883] CPU: 0 PID: 6883 Comm: syz-executor748 Not tainted 5.8.0-rc3-syzkaller #0 [ 54.442405][ T6883] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.452450][ T6883] Call Trace: [ 54.455728][ T6883] dump_stack+0x18f/0x20d [ 54.460053][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 54.466296][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 54.472526][ T6883] print_address_description.constprop.0.cold+0xae/0x436 [ 54.479595][ T6883] ? ____sys_sendmsg+0x6e8/0x810 [ 54.484508][ T6883] ? ___sys_sendmsg+0xf3/0x170 [ 54.489248][ T6883] ? __sys_sendmsg+0xe5/0x1b0 [ 54.493908][ T6883] ? lockdep_hardirqs_off+0x66/0xa0 [ 54.499087][ T6883] ? vprintk_func+0x97/0x1a6 [ 54.503774][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 54.510010][ T6883] kasan_report.cold+0x1f/0x37 [ 54.514762][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 54.520985][ T6883] tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 54.527036][ T6883] ? tipc_nl_node_dump_monitor+0x300/0x300 [ 54.532826][ T6883] ? lock_is_held_type+0xb0/0xe0 [ 54.537744][ T6883] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 54.543269][ T6883] ? kmem_cache_alloc_node_trace+0x3b0/0x400 [ 54.549236][ T6883] ? __kmalloc_node_track_caller+0x38/0x60 [ 54.555029][ T6883] ? kasan_unpoison_shadow+0x33/0x40 [ 54.560304][ T6883] ? __phys_addr+0x9a/0x110 [ 54.564824][ T6883] ? memset+0x20/0x40 [ 54.568787][ T6883] genl_lock_dumpit+0x7f/0xb0 [ 54.573458][ T6883] netlink_dump+0x4cd/0xf60 [ 54.577958][ T6883] ? netlink_insert+0x1670/0x1670 [ 54.582960][ T6883] ? __mutex_unlock_slowpath+0xe2/0x610 [ 54.588488][ T6883] ? genl_start+0x45a/0x6e0 [ 54.592995][ T6883] __netlink_dump_start+0x643/0x900 [ 54.598170][ T6883] ? genl_rcv_msg+0x9e0/0x9e0 [ 54.602837][ T6883] ? tipc_nl_node_dump_monitor+0x300/0x300 [ 54.608621][ T6883] genl_family_rcv_msg_dumpit+0x2ac/0x310 [ 54.614321][ T6883] ? genl_rcv+0x40/0x40 [ 54.618455][ T6883] ? mutex_lock_io_nested+0xf60/0xf60 [ 54.623808][ T6883] ? mark_lock+0xbc/0x1710 [ 54.628209][ T6883] ? genl_rcv_msg+0x9e0/0x9e0 [ 54.632863][ T6883] ? genl_unlock+0x20/0x20 [ 54.637955][ T6883] ? genl_parallel_done+0x170/0x170 [ 54.643132][ T6883] ? __radix_tree_lookup+0x1f3/0x290 [ 54.649706][ T6883] genl_rcv_msg+0x797/0x9e0 [ 54.654193][ T6883] ? genl_family_rcv_msg_attrs_parse.isra.0+0x310/0x310 [ 54.661115][ T6883] ? lock_acquire+0x1f1/0xad0 [ 54.665774][ T6883] ? genl_rcv+0x15/0x40 [ 54.669989][ T6883] ? lock_release+0x8d0/0x8d0 [ 54.674656][ T6883] netlink_rcv_skb+0x15a/0x430 [ 54.679407][ T6883] ? genl_family_rcv_msg_attrs_parse.isra.0+0x310/0x310 [ 54.686322][ T6883] ? netlink_ack+0xa10/0xa10 [ 54.690926][ T6883] genl_rcv+0x24/0x40 [ 54.694895][ T6883] netlink_unicast+0x533/0x7d0 [ 54.699637][ T6883] ? netlink_attachskb+0x810/0x810 [ 54.704728][ T6883] ? _copy_from_iter_full+0x247/0x890 [ 54.710078][ T6883] ? __phys_addr+0x9a/0x110 [ 54.714560][ T6883] ? __phys_addr_symbol+0x2c/0x70 [ 54.719584][ T6883] ? __check_object_size+0x171/0x3e4 [ 54.724850][ T6883] netlink_sendmsg+0x856/0xd90 [ 54.729596][ T6883] ? netlink_unicast+0x7d0/0x7d0 [ 54.734520][ T6883] ? netlink_unicast+0x7d0/0x7d0 [ 54.739457][ T6883] sock_sendmsg+0xcf/0x120 [ 54.743873][ T6883] ____sys_sendmsg+0x6e8/0x810 [ 54.748635][ T6883] ? kernel_sendmsg+0x50/0x50 [ 54.753284][ T6883] ? do_recvmmsg+0x6d0/0x6d0 [ 54.757861][ T6883] ? find_held_lock+0x2d/0x110 [ 54.762635][ T6883] ? debug_object_activate+0x287/0x3e0 [ 54.768080][ T6883] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 54.774037][ T6883] ? lock_downgrade+0x820/0x820 [ 54.778977][ T6883] ___sys_sendmsg+0xf3/0x170 [ 54.783577][ T6883] ? sendmsg_copy_msghdr+0x160/0x160 [ 54.788844][ T6883] ? lock_downgrade+0x820/0x820 [ 54.793674][ T6883] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 54.799545][ T6883] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.805505][ T6883] ? trace_hardirqs_on+0x5f/0x220 [ 54.810508][ T6883] ? lockdep_hardirqs_on+0x6a/0xe0 [ 54.815703][ T6883] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 54.821529][ T6883] ? debug_object_active_state+0x260/0x350 [ 54.827331][ T6883] ? __fget_light+0x215/0x280 [ 54.831996][ T6883] __sys_sendmsg+0xe5/0x1b0 [ 54.836476][ T6883] ? __sys_sendmsg_sock+0xb0/0xb0 [ 54.841500][ T6883] ? lock_is_held_type+0xb0/0xe0 [ 54.846441][ T6883] ? lock_is_held_type+0xb0/0xe0 [ 54.851371][ T6883] ? do_fast_syscall_32+0x40/0x120 [ 54.856477][ T6883] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.862458][ T6883] do_syscall_32_irqs_on+0x3f/0x60 [ 54.867581][ T6883] do_fast_syscall_32+0x7f/0x120 [ 54.872587][ T6883] entry_SYSENTER_compat+0x6d/0x7c [ 54.877675][ T6883] RIP: 0023:0xf7f89569 [ 54.881715][ T6883] Code: Bad RIP value. [ 54.885781][ T6883] RSP: 002b:00000000ff9c761c EFLAGS: 00000282 ORIG_RAX: 0000000000000172 [ 54.894198][ T6883] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200000c0 [ 54.902146][ T6883] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ff9c7734 [ 54.910095][ T6883] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 54.918053][ T6883] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 54.926012][ T6883] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 54.933972][ T6883] [ 54.936277][ T6883] Allocated by task 6885: [ 54.940608][ T6883] save_stack+0x1b/0x40 [ 54.944751][ T6883] __kasan_kmalloc.constprop.0+0xc2/0xd0 [ 54.950387][ T6883] __alloc_skb+0xae/0x550 [ 54.954699][ T6883] netlink_sendmsg+0x94f/0xd90 [ 54.959536][ T6883] sock_sendmsg+0xcf/0x120 [ 54.963928][ T6883] ____sys_sendmsg+0x6e8/0x810 [ 54.968674][ T6883] ___sys_sendmsg+0xf3/0x170 [ 54.973266][ T6883] __sys_sendmsg+0xe5/0x1b0 [ 54.977747][ T6883] do_syscall_32_irqs_on+0x3f/0x60 [ 54.982834][ T6883] do_fast_syscall_32+0x7f/0x120 [ 54.987747][ T6883] entry_SYSENTER_compat+0x6d/0x7c [ 54.992830][ T6883] [ 54.995154][ T6883] Freed by task 6885: [ 54.999114][ T6883] save_stack+0x1b/0x40 [ 55.003268][ T6883] __kasan_slab_free+0xf5/0x140 [ 55.008100][ T6883] kfree+0x103/0x2c0 [ 55.011981][ T6883] skb_release_data+0x6d9/0x910 [ 55.016827][ T6883] consume_skb+0xc2/0x160 [ 55.021150][ T6883] netlink_unicast+0x53b/0x7d0 [ 55.025898][ T6883] netlink_sendmsg+0x856/0xd90 [ 55.030668][ T6883] sock_sendmsg+0xcf/0x120 [ 55.035061][ T6883] ____sys_sendmsg+0x6e8/0x810 [ 55.039802][ T6883] ___sys_sendmsg+0xf3/0x170 [ 55.044369][ T6883] __sys_sendmsg+0xe5/0x1b0 [ 55.048849][ T6883] do_syscall_32_irqs_on+0x3f/0x60 [ 55.054893][ T6883] do_fast_syscall_32+0x7f/0x120 [ 55.059834][ T6883] entry_SYSENTER_compat+0x6d/0x7c [ 55.065002][ T6883] [ 55.067314][ T6883] The buggy address belongs to the object at ffff8880a756b400 [ 55.067314][ T6883] which belongs to the cache kmalloc-512 of size 512 [ 55.081341][ T6883] The buggy address is located 20 bytes inside of [ 55.081341][ T6883] 512-byte region [ffff8880a756b400, ffff8880a756b600) [ 55.094497][ T6883] The buggy address belongs to the page: [ 55.100127][ T6883] page:ffffea00029d5ac0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a756bc00 [ 55.110532][ T6883] flags: 0xfffe0000000200(slab) [ 55.115391][ T6883] raw: 00fffe0000000200 ffffea00027d5fc8 ffffea0002428688 ffff8880aa000a80 [ 55.123952][ T6883] raw: ffff8880a756bc00 ffff8880a756b000 0000000100000003 0000000000000000 [ 55.132508][ T6883] page dumped because: kasan: bad access detected [ 55.138893][ T6883] [ 55.141203][ T6883] Memory state around the buggy address: [ 55.146867][ T6883] ffff8880a756b300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 55.154906][ T6883] ffff8880a756b380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 55.163030][ T6883] >ffff8880a756b400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.171064][ T6883] ^ [ 55.175631][ T6883] ffff8880a756b480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.183763][ T6883] ffff8880a756b500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.191821][ T6883] ================================================================== [ 55.199964][ T6883] Disabling lock debugging due to kernel taint executing program [ 55.210335][ T6883] Kernel panic - not syncing: panic_on_warn set ... [ 55.216984][ T6883] CPU: 0 PID: 6883 Comm: syz-executor748 Tainted: G B 5.8.0-rc3-syzkaller #0 [ 55.227037][ T6883] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.237083][ T6883] Call Trace: [ 55.240368][ T6883] dump_stack+0x18f/0x20d [ 55.244694][ T6883] ? tipc_nl_node_dump_monitor_peer+0x3e0/0x590 [ 55.250946][ T6883] panic+0x2e3/0x75c [ 55.254826][ T6883] ? __warn_printk+0xf3/0xf3 [ 55.259395][ T6883] ? preempt_schedule_common+0x59/0xc0 [ 55.265615][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 55.271851][ T6883] ? preempt_schedule_thunk+0x16/0x18 [ 55.277197][ T6883] ? trace_hardirqs_on+0x55/0x220 [ 55.282203][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 55.288426][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 55.294638][ T6883] end_report+0x4d/0x53 [ 55.298779][ T6883] kasan_report.cold+0xd/0x37 [ 55.303435][ T6883] ? tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 55.309651][ T6883] tipc_nl_node_dump_monitor_peer+0x4da/0x590 [ 55.315696][ T6883] ? tipc_nl_node_dump_monitor+0x300/0x300 [ 55.321475][ T6883] ? lock_is_held_type+0xb0/0xe0 [ 55.326409][ T6883] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 55.331949][ T6883] ? kmem_cache_alloc_node_trace+0x3b0/0x400 [ 55.337902][ T6883] ? __kmalloc_node_track_caller+0x38/0x60 [ 55.343687][ T6883] ? kasan_unpoison_shadow+0x33/0x40 [ 55.348957][ T6883] ? __phys_addr+0x9a/0x110 [ 55.353437][ T6883] ? memset+0x20/0x40 [ 55.357395][ T6883] genl_lock_dumpit+0x7f/0xb0 [ 55.362046][ T6883] netlink_dump+0x4cd/0xf60 [ 55.366521][ T6883] ? netlink_insert+0x1670/0x1670 [ 55.371525][ T6883] ? __mutex_unlock_slowpath+0xe2/0x610 [ 55.377099][ T6883] ? genl_start+0x45a/0x6e0 [ 55.385835][ T6883] __netlink_dump_start+0x643/0x900 [ 55.391185][ T6883] ? genl_rcv_msg+0x9e0/0x9e0 [ 55.395856][ T6883] ? tipc_nl_node_dump_monitor+0x300/0x300 [ 55.401639][ T6883] genl_family_rcv_msg_dumpit+0x2ac/0x310 [ 55.407391][ T6883] ? genl_rcv+0x40/0x40 [ 55.411523][ T6883] ? mutex_lock_io_nested+0xf60/0xf60 [ 55.416873][ T6883] ? mark_lock+0xbc/0x1710 [ 55.421266][ T6883] ? genl_rcv_msg+0x9e0/0x9e0 [ 55.425937][ T6883] ? genl_unlock+0x20/0x20 [ 55.430328][ T6883] ? genl_parallel_done+0x170/0x170 [ 55.435504][ T6883] ? __radix_tree_lookup+0x1f3/0x290 [ 55.440766][ T6883] genl_rcv_msg+0x797/0x9e0 [ 55.445250][ T6883] ? genl_family_rcv_msg_attrs_parse.isra.0+0x310/0x310 [ 55.452163][ T6883] ? lock_acquire+0x1f1/0xad0 [ 55.456815][ T6883] ? genl_rcv+0x15/0x40 [ 55.460947][ T6883] ? lock_release+0x8d0/0x8d0 [ 55.465622][ T6883] netlink_rcv_skb+0x15a/0x430 [ 55.470363][ T6883] ? genl_family_rcv_msg_attrs_parse.isra.0+0x310/0x310 [ 55.477301][ T6883] ? netlink_ack+0xa10/0xa10 [ 55.481875][ T6883] genl_rcv+0x24/0x40 [ 55.486354][ T6883] netlink_unicast+0x533/0x7d0 [ 55.491094][ T6883] ? netlink_attachskb+0x810/0x810 [ 55.496180][ T6883] ? _copy_from_iter_full+0x247/0x890 [ 55.501536][ T6883] ? __phys_addr+0x9a/0x110 [ 55.506039][ T6883] ? __phys_addr_symbol+0x2c/0x70 [ 55.511067][ T6883] ? __check_object_size+0x171/0x3e4 [ 55.516328][ T6883] netlink_sendmsg+0x856/0xd90 [ 55.521074][ T6883] ? netlink_unicast+0x7d0/0x7d0 [ 55.526005][ T6883] ? netlink_unicast+0x7d0/0x7d0 [ 55.530926][ T6883] sock_sendmsg+0xcf/0x120 [ 55.535323][ T6883] ____sys_sendmsg+0x6e8/0x810 [ 55.540063][ T6883] ? kernel_sendmsg+0x50/0x50 [ 55.544715][ T6883] ? do_recvmmsg+0x6d0/0x6d0 [ 55.549282][ T6883] ? find_held_lock+0x2d/0x110 [ 55.554022][ T6883] ? debug_object_activate+0x287/0x3e0 [ 55.559457][ T6883] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 55.565418][ T6883] ? lock_downgrade+0x820/0x820 [ 55.570271][ T6883] ___sys_sendmsg+0xf3/0x170 [ 55.574836][ T6883] ? sendmsg_copy_msghdr+0x160/0x160 [ 55.580098][ T6883] ? lock_downgrade+0x820/0x820 [ 55.584924][ T6883] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 55.590709][ T6883] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.596673][ T6883] ? trace_hardirqs_on+0x5f/0x220 [ 55.601788][ T6883] ? lockdep_hardirqs_on+0x6a/0xe0 [ 55.606873][ T6883] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 55.613699][ T6883] ? debug_object_active_state+0x260/0x350 [ 55.619481][ T6883] ? __fget_light+0x215/0x280 [ 55.624135][ T6883] __sys_sendmsg+0xe5/0x1b0 [ 55.628798][ T6883] ? __sys_sendmsg_sock+0xb0/0xb0 [ 55.633796][ T6883] ? lock_is_held_type+0xb0/0xe0 [ 55.638709][ T6883] ? lock_is_held_type+0xb0/0xe0 [ 55.643622][ T6883] ? do_fast_syscall_32+0x40/0x120 [ 55.648708][ T6883] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 55.654666][ T6883] do_syscall_32_irqs_on+0x3f/0x60 [ 55.659752][ T6883] do_fast_syscall_32+0x7f/0x120 [ 55.664673][ T6883] entry_SYSENTER_compat+0x6d/0x7c [ 55.669764][ T6883] RIP: 0023:0xf7f89569 [ 55.673856][ T6883] Code: Bad RIP value. [ 55.677898][ T6883] RSP: 002b:00000000ff9c761c EFLAGS: 00000282 ORIG_RAX: 0000000000000172 [ 55.686295][ T6883] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200000c0 [ 55.694249][ T6883] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ff9c7734 [ 55.702204][ T6883] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 55.710157][ T6883] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 55.718101][ T6883] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 55.727431][ T6883] Kernel Offset: disabled [ 55.731763][ T6883] Rebooting in 86400 seconds..