CVE-2023-53863 (GCVE-0-2023-53863)
Vulnerability from cvelistv5
Published
2025-12-09 01:30
Modified
2025-12-09 01:30
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netlink: do not hard code device address lenth in fdb dumps syzbot reports that some netdev devices do not have a six bytes address [1] Replace ETH_ALEN by dev->addr_len. [1] (Case of a device where dev->addr_len = 4) BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in copyout+0xb8/0x100 lib/iov_iter.c:169 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copyout+0xb8/0x100 lib/iov_iter.c:169 _copy_to_iter+0x6d8/0x1d00 lib/iov_iter.c:536 copy_to_iter include/linux/uio.h:206 [inline] simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:513 __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:419 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:527 skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline] netlink_recvmsg+0x4ae/0x15a0 net/netlink/af_netlink.c:1970 sock_recvmsg_nosec net/socket.c:1019 [inline] sock_recvmsg net/socket.c:1040 [inline] ____sys_recvmsg+0x283/0x7f0 net/socket.c:2722 ___sys_recvmsg+0x223/0x840 net/socket.c:2764 do_recvmmsg+0x4f9/0xfd0 net/socket.c:2858 __sys_recvmmsg net/socket.c:2937 [inline] __do_sys_recvmmsg net/socket.c:2960 [inline] __se_sys_recvmmsg net/socket.c:2953 [inline] __x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was stored to memory at: __nla_put lib/nlattr.c:1009 [inline] nla_put+0x1c6/0x230 lib/nlattr.c:1067 nlmsg_populate_fdb_fill+0x2b8/0x600 net/core/rtnetlink.c:4071 nlmsg_populate_fdb net/core/rtnetlink.c:4418 [inline] ndo_dflt_fdb_dump+0x616/0x840 net/core/rtnetlink.c:4456 rtnl_fdb_dump+0x14ff/0x1fc0 net/core/rtnetlink.c:4629 netlink_dump+0x9d1/0x1310 net/netlink/af_netlink.c:2268 netlink_recvmsg+0xc5c/0x15a0 net/netlink/af_netlink.c:1995 sock_recvmsg_nosec+0x7a/0x120 net/socket.c:1019 ____sys_recvmsg+0x664/0x7f0 net/socket.c:2720 ___sys_recvmsg+0x223/0x840 net/socket.c:2764 do_recvmmsg+0x4f9/0xfd0 net/socket.c:2858 __sys_recvmmsg net/socket.c:2937 [inline] __do_sys_recvmmsg net/socket.c:2960 [inline] __se_sys_recvmmsg net/socket.c:2953 [inline] __x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716 slab_alloc_node mm/slub.c:3451 [inline] __kmem_cache_alloc_node+0x4ff/0x8b0 mm/slub.c:3490 kmalloc_trace+0x51/0x200 mm/slab_common.c:1057 kmalloc include/linux/slab.h:559 [inline] __hw_addr_create net/core/dev_addr_lists.c:60 [inline] __hw_addr_add_ex+0x2e5/0x9e0 net/core/dev_addr_lists.c:118 __dev_mc_add net/core/dev_addr_lists.c:867 [inline] dev_mc_add+0x9a/0x130 net/core/dev_addr_lists.c:885 igmp6_group_added+0x267/0xbc0 net/ipv6/mcast.c:680 ipv6_mc_up+0x296/0x3b0 net/ipv6/mcast.c:2754 ipv6_mc_remap+0x1e/0x30 net/ipv6/mcast.c:2708 addrconf_type_change net/ipv6/addrconf.c:3731 [inline] addrconf_notify+0x4d3/0x1d90 net/ipv6/addrconf.c:3699 notifier_call_chain kernel/notifier.c:93 [inline] raw_notifier_call_chain+0xe4/0x430 kernel/notifier.c:461 call_netdevice_notifiers_info net/core/dev.c:1935 [inline] call_netdevice_notifiers_extack net/core/dev.c:1973 [inline] call_netdevice_notifiers+0x1ee/0x2d0 net/core/dev.c:1987 bond_enslave+0xccd/0x53f0 drivers/net/bonding/bond_main.c:1906 do_set_master net/core/rtnetlink.c:2626 [inline] rtnl_newlink_create net/core/rtnetlink.c:3460 [inline] __rtnl_newlink net/core/rtnetlink.c:3660 [inline] rtnl_newlink+0x378c/0x40e0 net/core/rtnetlink.c:3673 rtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6395 netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2546 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6413 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0xf28/0x1230 net/netlink/af_ ---truncated---
References
Impacted products
Vendor Product Version
Linux Linux Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
Version: d83b060360485454fcd6870340ec01d6f96f2295
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{
  "containers": {
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        {
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          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "3.5"
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              "version": "0",
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              "version": "4.19.291",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.4.251",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.121",
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            },
            {
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              "status": "unaffected",
              "version": "6.1.39",
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            },
            {
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              "version": "6.3.13",
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            },
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              "version": "6.4.4",
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            },
            {
              "lessThanOrEqual": "*",
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              "version": "6.5",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "versionStartIncluding": "3.5",
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                {
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                }
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              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: do not hard code device address lenth in fdb dumps\n\nsyzbot reports that some netdev devices do not have a six bytes\naddress [1]\n\nReplace ETH_ALEN by dev-\u003eaddr_len.\n\n[1] (Case of a device where dev-\u003eaddr_len = 4)\n\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\nBUG: KMSAN: kernel-infoleak in copyout+0xb8/0x100 lib/iov_iter.c:169\ninstrument_copy_to_user include/linux/instrumented.h:114 [inline]\ncopyout+0xb8/0x100 lib/iov_iter.c:169\n_copy_to_iter+0x6d8/0x1d00 lib/iov_iter.c:536\ncopy_to_iter include/linux/uio.h:206 [inline]\nsimple_copy_to_iter+0x68/0xa0 net/core/datagram.c:513\n__skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:419\nskb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:527\nskb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\nnetlink_recvmsg+0x4ae/0x15a0 net/netlink/af_netlink.c:1970\nsock_recvmsg_nosec net/socket.c:1019 [inline]\nsock_recvmsg net/socket.c:1040 [inline]\n____sys_recvmsg+0x283/0x7f0 net/socket.c:2722\n___sys_recvmsg+0x223/0x840 net/socket.c:2764\ndo_recvmmsg+0x4f9/0xfd0 net/socket.c:2858\n__sys_recvmmsg net/socket.c:2937 [inline]\n__do_sys_recvmmsg net/socket.c:2960 [inline]\n__se_sys_recvmmsg net/socket.c:2953 [inline]\n__x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was stored to memory at:\n__nla_put lib/nlattr.c:1009 [inline]\nnla_put+0x1c6/0x230 lib/nlattr.c:1067\nnlmsg_populate_fdb_fill+0x2b8/0x600 net/core/rtnetlink.c:4071\nnlmsg_populate_fdb net/core/rtnetlink.c:4418 [inline]\nndo_dflt_fdb_dump+0x616/0x840 net/core/rtnetlink.c:4456\nrtnl_fdb_dump+0x14ff/0x1fc0 net/core/rtnetlink.c:4629\nnetlink_dump+0x9d1/0x1310 net/netlink/af_netlink.c:2268\nnetlink_recvmsg+0xc5c/0x15a0 net/netlink/af_netlink.c:1995\nsock_recvmsg_nosec+0x7a/0x120 net/socket.c:1019\n____sys_recvmsg+0x664/0x7f0 net/socket.c:2720\n___sys_recvmsg+0x223/0x840 net/socket.c:2764\ndo_recvmmsg+0x4f9/0xfd0 net/socket.c:2858\n__sys_recvmmsg net/socket.c:2937 [inline]\n__do_sys_recvmmsg net/socket.c:2960 [inline]\n__se_sys_recvmmsg net/socket.c:2953 [inline]\n__x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\nslab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716\nslab_alloc_node mm/slub.c:3451 [inline]\n__kmem_cache_alloc_node+0x4ff/0x8b0 mm/slub.c:3490\nkmalloc_trace+0x51/0x200 mm/slab_common.c:1057\nkmalloc include/linux/slab.h:559 [inline]\n__hw_addr_create net/core/dev_addr_lists.c:60 [inline]\n__hw_addr_add_ex+0x2e5/0x9e0 net/core/dev_addr_lists.c:118\n__dev_mc_add net/core/dev_addr_lists.c:867 [inline]\ndev_mc_add+0x9a/0x130 net/core/dev_addr_lists.c:885\nigmp6_group_added+0x267/0xbc0 net/ipv6/mcast.c:680\nipv6_mc_up+0x296/0x3b0 net/ipv6/mcast.c:2754\nipv6_mc_remap+0x1e/0x30 net/ipv6/mcast.c:2708\naddrconf_type_change net/ipv6/addrconf.c:3731 [inline]\naddrconf_notify+0x4d3/0x1d90 net/ipv6/addrconf.c:3699\nnotifier_call_chain kernel/notifier.c:93 [inline]\nraw_notifier_call_chain+0xe4/0x430 kernel/notifier.c:461\ncall_netdevice_notifiers_info net/core/dev.c:1935 [inline]\ncall_netdevice_notifiers_extack net/core/dev.c:1973 [inline]\ncall_netdevice_notifiers+0x1ee/0x2d0 net/core/dev.c:1987\nbond_enslave+0xccd/0x53f0 drivers/net/bonding/bond_main.c:1906\ndo_set_master net/core/rtnetlink.c:2626 [inline]\nrtnl_newlink_create net/core/rtnetlink.c:3460 [inline]\n__rtnl_newlink net/core/rtnetlink.c:3660 [inline]\nrtnl_newlink+0x378c/0x40e0 net/core/rtnetlink.c:3673\nrtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6395\nnetlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2546\nrtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6413\nnetlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]\nnetlink_unicast+0xf28/0x1230 net/netlink/af_\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-09T01:30:32.109Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/61d1bf3c34bf5fe936c50d1a4bc460babcc85e88"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3ad49ff5c030cbe719fc4cb0ae081b8255ef4b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd1de6107f10e7d4c2aabe3397b58d63672fc511"
        },
        {
          "url": "https://git.kernel.org/stable/c/44db85c6e1a184b99a2cdf56b525ac63c4962c22"
        },
        {
          "url": "https://git.kernel.org/stable/c/619384319b137908d1008c92426c9daa95c06b90"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9331c8fa4c69f09d2c71682af75586f77266e81"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6f2d4618fc697886ad41e215ae20638153e42d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/73862118bd9dec850aa8e775145647ddd23aedf8"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa5406950726e336c5c9585b09799a734b6e77bf"
        }
      ],
      "title": "netlink: do not hard code device address lenth in fdb dumps",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53863",
    "datePublished": "2025-12-09T01:30:32.109Z",
    "dateReserved": "2025-12-09T01:27:17.829Z",
    "dateUpdated": "2025-12-09T01:30:32.109Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53863\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-09T16:17:27.160\",\"lastModified\":\"2025-12-09T18:37:13.640\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetlink: do not hard code device address lenth in fdb dumps\\n\\nsyzbot reports that some netdev devices do not have a six bytes\\naddress [1]\\n\\nReplace ETH_ALEN by dev-\u003eaddr_len.\\n\\n[1] (Case of a device where dev-\u003eaddr_len = 4)\\n\\nBUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\nBUG: KMSAN: kernel-infoleak in copyout+0xb8/0x100 lib/iov_iter.c:169\\ninstrument_copy_to_user include/linux/instrumented.h:114 [inline]\\ncopyout+0xb8/0x100 lib/iov_iter.c:169\\n_copy_to_iter+0x6d8/0x1d00 lib/iov_iter.c:536\\ncopy_to_iter include/linux/uio.h:206 [inline]\\nsimple_copy_to_iter+0x68/0xa0 net/core/datagram.c:513\\n__skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:419\\nskb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:527\\nskb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\\nnetlink_recvmsg+0x4ae/0x15a0 net/netlink/af_netlink.c:1970\\nsock_recvmsg_nosec net/socket.c:1019 [inline]\\nsock_recvmsg net/socket.c:1040 [inline]\\n____sys_recvmsg+0x283/0x7f0 net/socket.c:2722\\n___sys_recvmsg+0x223/0x840 net/socket.c:2764\\ndo_recvmmsg+0x4f9/0xfd0 net/socket.c:2858\\n__sys_recvmmsg net/socket.c:2937 [inline]\\n__do_sys_recvmmsg net/socket.c:2960 [inline]\\n__se_sys_recvmmsg net/socket.c:2953 [inline]\\n__x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953\\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\\ndo_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nUninit was stored to memory at:\\n__nla_put lib/nlattr.c:1009 [inline]\\nnla_put+0x1c6/0x230 lib/nlattr.c:1067\\nnlmsg_populate_fdb_fill+0x2b8/0x600 net/core/rtnetlink.c:4071\\nnlmsg_populate_fdb net/core/rtnetlink.c:4418 [inline]\\nndo_dflt_fdb_dump+0x616/0x840 net/core/rtnetlink.c:4456\\nrtnl_fdb_dump+0x14ff/0x1fc0 net/core/rtnetlink.c:4629\\nnetlink_dump+0x9d1/0x1310 net/netlink/af_netlink.c:2268\\nnetlink_recvmsg+0xc5c/0x15a0 net/netlink/af_netlink.c:1995\\nsock_recvmsg_nosec+0x7a/0x120 net/socket.c:1019\\n____sys_recvmsg+0x664/0x7f0 net/socket.c:2720\\n___sys_recvmsg+0x223/0x840 net/socket.c:2764\\ndo_recvmmsg+0x4f9/0xfd0 net/socket.c:2858\\n__sys_recvmmsg net/socket.c:2937 [inline]\\n__do_sys_recvmmsg net/socket.c:2960 [inline]\\n__se_sys_recvmmsg net/socket.c:2953 [inline]\\n__x64_sys_recvmmsg+0x397/0x490 net/socket.c:2953\\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\\ndo_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nUninit was created at:\\nslab_post_alloc_hook+0x12d/0xb60 mm/slab.h:716\\nslab_alloc_node mm/slub.c:3451 [inline]\\n__kmem_cache_alloc_node+0x4ff/0x8b0 mm/slub.c:3490\\nkmalloc_trace+0x51/0x200 mm/slab_common.c:1057\\nkmalloc include/linux/slab.h:559 [inline]\\n__hw_addr_create net/core/dev_addr_lists.c:60 [inline]\\n__hw_addr_add_ex+0x2e5/0x9e0 net/core/dev_addr_lists.c:118\\n__dev_mc_add net/core/dev_addr_lists.c:867 [inline]\\ndev_mc_add+0x9a/0x130 net/core/dev_addr_lists.c:885\\nigmp6_group_added+0x267/0xbc0 net/ipv6/mcast.c:680\\nipv6_mc_up+0x296/0x3b0 net/ipv6/mcast.c:2754\\nipv6_mc_remap+0x1e/0x30 net/ipv6/mcast.c:2708\\naddrconf_type_change net/ipv6/addrconf.c:3731 [inline]\\naddrconf_notify+0x4d3/0x1d90 net/ipv6/addrconf.c:3699\\nnotifier_call_chain kernel/notifier.c:93 [inline]\\nraw_notifier_call_chain+0xe4/0x430 kernel/notifier.c:461\\ncall_netdevice_notifiers_info net/core/dev.c:1935 [inline]\\ncall_netdevice_notifiers_extack net/core/dev.c:1973 [inline]\\ncall_netdevice_notifiers+0x1ee/0x2d0 net/core/dev.c:1987\\nbond_enslave+0xccd/0x53f0 drivers/net/bonding/bond_main.c:1906\\ndo_set_master net/core/rtnetlink.c:2626 [inline]\\nrtnl_newlink_create net/core/rtnetlink.c:3460 [inline]\\n__rtnl_newlink net/core/rtnetlink.c:3660 [inline]\\nrtnl_newlink+0x378c/0x40e0 net/core/rtnetlink.c:3673\\nrtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6395\\nnetlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2546\\nrtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6413\\nnetlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]\\nnetlink_unicast+0xf28/0x1230 net/netlink/af_\\n---truncated---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/44db85c6e1a184b99a2cdf56b525ac63c4962c22\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/619384319b137908d1008c92426c9daa95c06b90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61d1bf3c34bf5fe936c50d1a4bc460babcc85e88\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73862118bd9dec850aa8e775145647ddd23aedf8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa5406950726e336c5c9585b09799a734b6e77bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b6f2d4618fc697886ad41e215ae20638153e42d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd1de6107f10e7d4c2aabe3397b58d63672fc511\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c3ad49ff5c030cbe719fc4cb0ae081b8255ef4b3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e9331c8fa4c69f09d2c71682af75586f77266e81\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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