Warning: Permanently added '10.128.10.21' (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 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 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 syzkaller login: [ 69.954047][ T9201] ================================================================== [ 69.962576][ T9201] BUG: KASAN: use-after-free in tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 69.971449][ T9201] Read of size 2 at addr ffff888094ee9ad4 by task syz-executor997/9201 [ 69.979694][ T9201] [ 69.982051][ T9201] CPU: 1 PID: 9201 Comm: syz-executor997 Not tainted 5.4.0-rc1+ #0 [ 69.990078][ T9201] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.000139][ T9201] Call Trace: [ 70.003432][ T9201] dump_stack+0x172/0x1f0 [ 70.007848][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.014261][ T9201] print_address_description.constprop.0.cold+0xd4/0x30b [ 70.021296][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.027533][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.033771][ T9201] __kasan_report.cold+0x1b/0x41 [ 70.038853][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.045216][ T9201] kasan_report+0x12/0x20 executing program executing program [ 70.049545][ T9201] __asan_report_load2_noabort+0x14/0x20 [ 70.055172][ T9201] tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.061237][ T9201] ? tipc_nl_node_dump_monitor+0x340/0x340 [ 70.067081][ T9201] ? __kmalloc_node_track_caller+0x4e/0x70 [ 70.072886][ T9201] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.079240][ T9201] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.085484][ T9201] ? __alloc_skb+0x3d0/0x5e0 [ 70.090078][ T9201] genl_lock_dumpit+0x86/0xc0 [ 70.094915][ T9201] netlink_dump+0x558/0xfb0 [ 70.099412][ T9201] ? netlink_broadcast+0x50/0x50 [ 70.104576][ T9201] __netlink_dump_start+0x5b1/0x7d0 [ 70.109940][ T9201] ? genl_lock_dumpit+0xc0/0xc0 [ 70.115021][ T9201] genl_rcv_msg+0xc9b/0x1000 [ 70.119858][ T9201] ? genl_family_rcv_msg_attrs_parse.isra.0+0x3a0/0x3a0 [ 70.127051][ T9201] ? genl_lock_dumpit+0xc0/0xc0 [ 70.132013][ T9201] ? genl_unlock+0x20/0x20 [ 70.136426][ T9201] ? genl_parallel_done+0x1c0/0x1c0 [ 70.141856][ T9201] ? mark_held_locks+0xf0/0xf0 [ 70.146761][ T9201] ? find_held_lock+0x35/0x130 [ 70.151578][ T9201] netlink_rcv_skb+0x177/0x450 [ 70.156372][ T9201] ? genl_family_rcv_msg_attrs_parse.isra.0+0x3a0/0x3a0 [ 70.163478][ T9201] ? netlink_ack+0xb50/0xb50 [ 70.168101][ T9201] ? __kasan_check_write+0x14/0x20 [ 70.173401][ T9201] ? netlink_deliver_tap+0x254/0xbf0 [ 70.179023][ T9201] genl_rcv+0x29/0x40 [ 70.183128][ T9201] netlink_unicast+0x531/0x710 [ 70.188072][ T9201] ? netlink_attachskb+0x7c0/0x7c0 [ 70.193685][ T9201] ? _copy_from_iter_full+0x25d/0x8c0 [ 70.199586][ T9201] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 70.205441][ T9201] ? __check_object_size+0x3d/0x437 [ 70.210736][ T9201] netlink_sendmsg+0x8a5/0xd60 [ 70.215550][ T9201] ? netlink_unicast+0x710/0x710 [ 70.220678][ T9201] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 70.226894][ T9201] ? apparmor_socket_sendmsg+0x2a/0x30 [ 70.232363][ T9201] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.238776][ T9201] ? security_socket_sendmsg+0x8d/0xc0 [ 70.244299][ T9201] ? netlink_unicast+0x710/0x710 [ 70.249268][ T9201] sock_sendmsg+0xd7/0x130 [ 70.253725][ T9201] ___sys_sendmsg+0x803/0x920 [ 70.258668][ T9201] ? copy_msghdr_from_user+0x440/0x440 [ 70.264144][ T9201] ? lock_downgrade+0x920/0x920 [ 70.269051][ T9201] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 70.275220][ T9201] ? lockdep_hardirqs_on+0x421/0x5e0 [ 70.280775][ T9201] ? __kasan_check_read+0x11/0x20 [ 70.286077][ T9201] ? mark_lock+0xc2/0x1220 [ 70.290549][ T9201] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 70.296402][ T9201] ? __kasan_check_read+0x11/0x20 [ 70.301482][ T9201] ? __lock_acquire+0x16f2/0x4a00 [ 70.306751][ T9201] ? debug_object_deactivate+0x320/0x320 [ 70.312492][ T9201] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 70.319012][ T9201] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.325293][ T9201] ? __fget_light+0x1a9/0x230 [ 70.329974][ T9201] ? __fdget+0x1b/0x20 [ 70.334050][ T9201] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.340434][ T9201] __sys_sendmsg+0x105/0x1d0 [ 70.345159][ T9201] ? __sys_sendmsg_sock+0xd0/0xd0 [ 70.350189][ T9201] ? lockdep_hardirqs_on+0x421/0x5e0 [ 70.355484][ T9201] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 70.361030][ T9201] ? do_syscall_64+0x26/0x760 [ 70.365705][ T9201] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.371836][ T9201] ? do_syscall_64+0x26/0x760 [ 70.376638][ T9201] __x64_sys_sendmsg+0x78/0xb0 [ 70.381585][ T9201] do_syscall_64+0xfa/0x760 [ 70.386147][ T9201] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.392034][ T9201] RIP: 0033:0x445239 [ 70.395959][ T9201] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 70.415811][ T9201] RSP: 002b:00007ffc1aee0468 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 70.424228][ T9201] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445239 [ 70.432200][ T9201] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 70.440165][ T9201] RBP: 00000000000110fa R08: 0000000000000000 R09: 00000000004002e0 [ 70.448489][ T9201] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004023d0 [ 70.456463][ T9201] R13: 0000000000402460 R14: 0000000000000000 R15: 0000000000000000 [ 70.464554][ T9201] [ 70.466893][ T9201] Allocated by task 9205: [ 70.471234][ T9201] save_stack+0x23/0x90 [ 70.475423][ T9201] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 70.481074][ T9201] kasan_kmalloc+0x9/0x10 [ 70.485415][ T9201] __kmalloc_node_track_caller+0x4e/0x70 [ 70.491225][ T9201] __kmalloc_reserve.isra.0+0x40/0xf0 [ 70.496955][ T9201] __alloc_skb+0x10b/0x5e0 [ 70.501639][ T9201] netlink_sendmsg+0x972/0xd60 [ 70.506401][ T9201] sock_sendmsg+0xd7/0x130 [ 70.511158][ T9201] ___sys_sendmsg+0x803/0x920 [ 70.515829][ T9201] __sys_sendmsg+0x105/0x1d0 [ 70.520680][ T9201] __x64_sys_sendmsg+0x78/0xb0 [ 70.525443][ T9201] do_syscall_64+0xfa/0x760 [ 70.530065][ T9201] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.536308][ T9201] [ 70.538633][ T9201] Freed by task 9205: [ 70.542737][ T9201] save_stack+0x23/0x90 [ 70.546892][ T9201] __kasan_slab_free+0x102/0x150 [ 70.551830][ T9201] kasan_slab_free+0xe/0x10 [ 70.558541][ T9201] kfree+0x10a/0x2c0 [ 70.562638][ T9201] skb_free_head+0x93/0xb0 [ 70.567381][ T9201] skb_release_data+0x42d/0x7c0 [ 70.572417][ T9201] skb_release_all+0x4d/0x60 [ 70.577406][ T9201] consume_skb+0xfb/0x3b0 [ 70.581738][ T9201] netlink_unicast+0x539/0x710 [ 70.586535][ T9201] netlink_sendmsg+0x8a5/0xd60 [ 70.591296][ T9201] sock_sendmsg+0xd7/0x130 [ 70.595772][ T9201] ___sys_sendmsg+0x803/0x920 [ 70.600445][ T9201] __sys_sendmsg+0x105/0x1d0 [ 70.605115][ T9201] __x64_sys_sendmsg+0x78/0xb0 [ 70.609884][ T9201] do_syscall_64+0xfa/0x760 [ 70.614522][ T9201] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.620603][ T9201] [ 70.622959][ T9201] The buggy address belongs to the object at ffff888094ee9ac0 [ 70.622959][ T9201] which belongs to the cache kmalloc-512 of size 512 [ 70.638142][ T9201] The buggy address is located 20 bytes inside of [ 70.638142][ T9201] 512-byte region [ffff888094ee9ac0, ffff888094ee9cc0) [ 70.656511][ T9201] The buggy address belongs to the page: [ 70.667902][ T9201] page:ffffea000253ba40 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0x0 [ 70.680377][ T9201] flags: 0x1fffc0000000200(slab) [ 70.686767][ T9201] raw: 01fffc0000000200 ffffea00024676c8 ffff8880aa401748 ffff8880aa400a80 [ 70.697495][ T9201] raw: 0000000000000000 ffff888094ee90c0 0000000100000006 0000000000000000 [ 70.707655][ T9201] page dumped because: kasan: bad access detected [ 70.714973][ T9201] [ 70.717438][ T9201] Memory state around the buggy address: [ 70.723586][ T9201] ffff888094ee9980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.732056][ T9201] ffff888094ee9a00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 70.740776][ T9201] >ffff888094ee9a80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 70.749352][ T9201] ^ executing program [ 70.756650][ T9201] ffff888094ee9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.765104][ T9201] ffff888094ee9b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.773422][ T9201] ================================================================== [ 70.782338][ T9201] Disabling lock debugging due to kernel taint [ 70.793047][ T9201] Kernel panic - not syncing: panic_on_warn set ... [ 70.800421][ T9201] CPU: 1 PID: 9201 Comm: syz-executor997 Tainted: G B 5.4.0-rc1+ #0 [ 70.810315][ T9201] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.824287][ T9201] Call Trace: [ 70.828803][ T9201] dump_stack+0x172/0x1f0 [ 70.835178][ T9201] panic+0x2dc/0x755 [ 70.841072][ T9201] ? add_taint.cold+0x16/0x16 [ 70.848975][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.857226][ T9201] ? preempt_schedule+0x4b/0x60 [ 70.862818][ T9201] ? ___preempt_schedule+0x16/0x20 [ 70.868111][ T9201] ? trace_hardirqs_on+0x5e/0x240 [ 70.873686][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.880540][ T9201] end_report+0x47/0x4f [ 70.885004][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.892078][ T9201] __kasan_report.cold+0xe/0x41 [ 70.897335][ T9201] ? tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.904815][ T9201] kasan_report+0x12/0x20 [ 70.910225][ T9201] __asan_report_load2_noabort+0x14/0x20 [ 70.916307][ T9201] tipc_nl_node_dump_monitor_peer+0x508/0x5c0 [ 70.922821][ T9201] ? tipc_nl_node_dump_monitor+0x340/0x340 [ 70.929772][ T9201] ? __kmalloc_node_track_caller+0x4e/0x70 [ 70.935714][ T9201] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.942278][ T9201] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.949721][ T9201] ? __alloc_skb+0x3d0/0x5e0 [ 70.954663][ T9201] genl_lock_dumpit+0x86/0xc0 [ 70.959350][ T9201] netlink_dump+0x558/0xfb0 [ 70.964425][ T9201] ? netlink_broadcast+0x50/0x50 [ 70.970141][ T9201] __netlink_dump_start+0x5b1/0x7d0 [ 70.976119][ T9201] ? genl_lock_dumpit+0xc0/0xc0 [ 70.981364][ T9201] genl_rcv_msg+0xc9b/0x1000 [ 70.986795][ T9201] ? genl_family_rcv_msg_attrs_parse.isra.0+0x3a0/0x3a0 [ 70.994499][ T9201] ? genl_lock_dumpit+0xc0/0xc0 [ 70.999367][ T9201] ? genl_unlock+0x20/0x20 [ 71.004212][ T9201] ? genl_parallel_done+0x1c0/0x1c0 [ 71.009521][ T9201] ? mark_held_locks+0xf0/0xf0 [ 71.014758][ T9201] ? find_held_lock+0x35/0x130 [ 71.020723][ T9201] netlink_rcv_skb+0x177/0x450 [ 71.026000][ T9201] ? genl_family_rcv_msg_attrs_parse.isra.0+0x3a0/0x3a0 [ 71.033510][ T9201] ? netlink_ack+0xb50/0xb50 [ 71.038751][ T9201] ? __kasan_check_write+0x14/0x20 [ 71.044308][ T9201] ? netlink_deliver_tap+0x254/0xbf0 [ 71.049916][ T9201] genl_rcv+0x29/0x40 [ 71.054446][ T9201] netlink_unicast+0x531/0x710 [ 71.059661][ T9201] ? netlink_attachskb+0x7c0/0x7c0 [ 71.065639][ T9201] ? _copy_from_iter_full+0x25d/0x8c0 [ 71.071394][ T9201] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 71.077814][ T9201] ? __check_object_size+0x3d/0x437 [ 71.083577][ T9201] netlink_sendmsg+0x8a5/0xd60 [ 71.088815][ T9201] ? netlink_unicast+0x710/0x710 [ 71.094431][ T9201] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 71.100125][ T9201] ? apparmor_socket_sendmsg+0x2a/0x30 [ 71.105753][ T9201] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.112557][ T9201] ? security_socket_sendmsg+0x8d/0xc0 [ 71.118126][ T9201] ? netlink_unicast+0x710/0x710 [ 71.123287][ T9201] sock_sendmsg+0xd7/0x130 [ 71.128208][ T9201] ___sys_sendmsg+0x803/0x920 [ 71.132902][ T9201] ? copy_msghdr_from_user+0x440/0x440 [ 71.138682][ T9201] ? lock_downgrade+0x920/0x920 [ 71.143645][ T9201] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 71.149964][ T9201] ? lockdep_hardirqs_on+0x421/0x5e0 [ 71.155485][ T9201] ? __kasan_check_read+0x11/0x20 [ 71.160861][ T9201] ? mark_lock+0xc2/0x1220 [ 71.165732][ T9201] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 71.172016][ T9201] ? __kasan_check_read+0x11/0x20 [ 71.177638][ T9201] ? __lock_acquire+0x16f2/0x4a00 [ 71.182827][ T9201] ? debug_object_deactivate+0x320/0x320 [ 71.189467][ T9201] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 71.196995][ T9201] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.204198][ T9201] ? __fget_light+0x1a9/0x230 [ 71.209079][ T9201] ? __fdget+0x1b/0x20 [ 71.213291][ T9201] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.219707][ T9201] __sys_sendmsg+0x105/0x1d0 [ 71.224418][ T9201] ? __sys_sendmsg_sock+0xd0/0xd0 [ 71.230009][ T9201] ? lockdep_hardirqs_on+0x421/0x5e0 [ 71.235891][ T9201] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 71.241727][ T9201] ? do_syscall_64+0x26/0x760 [ 71.246770][ T9201] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.253429][ T9201] ? do_syscall_64+0x26/0x760 [ 71.258264][ T9201] __x64_sys_sendmsg+0x78/0xb0 [ 71.263363][ T9201] do_syscall_64+0xfa/0x760 [ 71.268193][ T9201] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.274170][ T9201] RIP: 0033:0x445239 [ 71.278080][ T9201] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 71.298531][ T9201] RSP: 002b:00007ffc1aee0468 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 71.307132][ T9201] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445239 [ 71.315453][ T9201] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 [ 71.323636][ T9201] RBP: 00000000000110fa R08: 0000000000000000 R09: 00000000004002e0 [ 71.332253][ T9201] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004023d0 [ 71.340473][ T9201] R13: 0000000000402460 R14: 0000000000000000 R15: 0000000000000000 [ 71.350287][ T9201] Kernel Offset: disabled [ 71.354762][ T9201] Rebooting in 86400 seconds..