cve-2022-48785
Vulnerability from cvelistv5
Published
2024-07-16 11:13
Modified
2024-12-19 08:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcu-safe version of ipv6_get_lladdr() Some time ago 8965779d2c0e ("ipv6,mcast: always hold idev->lock before mca_lock") switched ipv6_get_lladdr() to __ipv6_get_lladdr(), which is rcu-unsafe version. That was OK, because idev->lock was held for these codepaths. In 88e2ca308094 ("mld: convert ifmcaddr6 to RCU") these external locks were removed, so we probably need to restore the original rcu-safe call. Otherwise, we occasionally get a machine crashed/stalled with the following in dmesg: [ 3405.966610][T230589] general protection fault, probably for non-canonical address 0xdead00000000008c: 0000 [#1] SMP NOPTI [ 3405.982083][T230589] CPU: 44 PID: 230589 Comm: kworker/44:3 Tainted: G O 5.15.19-cloudflare-2022.2.1 #1 [ 3405.998061][T230589] Hardware name: SUPA-COOL-SERV [ 3406.009552][T230589] Workqueue: mld mld_ifc_work [ 3406.017224][T230589] RIP: 0010:__ipv6_get_lladdr+0x34/0x60 [ 3406.025780][T230589] Code: 57 10 48 83 c7 08 48 89 e5 48 39 d7 74 3e 48 8d 82 38 ff ff ff eb 13 48 8b 90 d0 00 00 00 48 8d 82 38 ff ff ff 48 39 d7 74 22 <66> 83 78 32 20 77 1b 75 e4 89 ca 23 50 2c 75 dd 48 8b 50 08 48 8b [ 3406.055748][T230589] RSP: 0018:ffff94e4b3fc3d10 EFLAGS: 00010202 [ 3406.065617][T230589] RAX: dead00000000005a RBX: ffff94e4b3fc3d30 RCX: 0000000000000040 [ 3406.077477][T230589] RDX: dead000000000122 RSI: ffff94e4b3fc3d30 RDI: ffff8c3a31431008 [ 3406.089389][T230589] RBP: ffff94e4b3fc3d10 R08: 0000000000000000 R09: 0000000000000000 [ 3406.101445][T230589] R10: ffff8c3a31430000 R11: 000000000000000b R12: ffff8c2c37887100 [ 3406.113553][T230589] R13: ffff8c3a39537000 R14: 00000000000005dc R15: ffff8c3a31431000 [ 3406.125730][T230589] FS: 0000000000000000(0000) GS:ffff8c3b9fc80000(0000) knlGS:0000000000000000 [ 3406.138992][T230589] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3406.149895][T230589] CR2: 00007f0dfea1db60 CR3: 000000387b5f2000 CR4: 0000000000350ee0 [ 3406.162421][T230589] Call Trace: [ 3406.170235][T230589] <TASK> [ 3406.177736][T230589] mld_newpack+0xfe/0x1a0 [ 3406.186686][T230589] add_grhead+0x87/0xa0 [ 3406.195498][T230589] add_grec+0x485/0x4e0 [ 3406.204310][T230589] ? newidle_balance+0x126/0x3f0 [ 3406.214024][T230589] mld_ifc_work+0x15d/0x450 [ 3406.223279][T230589] process_one_work+0x1e6/0x380 [ 3406.232982][T230589] worker_thread+0x50/0x3a0 [ 3406.242371][T230589] ? rescuer_thread+0x360/0x360 [ 3406.252175][T230589] kthread+0x127/0x150 [ 3406.261197][T230589] ? set_kthread_struct+0x40/0x40 [ 3406.271287][T230589] ret_from_fork+0x22/0x30 [ 3406.280812][T230589] </TASK> [ 3406.288937][T230589] Modules linked in: ... [last unloaded: kheaders] [ 3406.476714][T230589] ---[ end trace 3525a7655f2f3b9e ]---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e
Impacted products
Vendor Product Version
Linux Linux Version: 88e2ca3080947fe22eb520c1f8231e79a105d011
Version: 88e2ca3080947fe22eb520c1f8231e79a105d011
Version: 88e2ca3080947fe22eb520c1f8231e79a105d011
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   Linux Linux Version: 5.13
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{
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          "dateUpdated": "2024-08-03T15:25:01.616Z",
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                "id": "CVE-2022-48785",
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        "title": "CISA ADP Vulnrichment"
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          "product": "Linux",
          "programFiles": [
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            "net/ipv6/addrconf.c",
            "net/ipv6/mcast.c"
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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": "0",
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              "status": "unaffected",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: use rcu-safe version of ipv6_get_lladdr()\n\nSome time ago 8965779d2c0e (\"ipv6,mcast: always hold idev-\u003elock before mca_lock\")\nswitched ipv6_get_lladdr() to __ipv6_get_lladdr(), which is rcu-unsafe\nversion. That was OK, because idev-\u003elock was held for these codepaths.\n\nIn 88e2ca308094 (\"mld: convert ifmcaddr6 to RCU\") these external locks were\nremoved, so we probably need to restore the original rcu-safe call.\n\nOtherwise, we occasionally get a machine crashed/stalled with the following\nin dmesg:\n\n[ 3405.966610][T230589] general protection fault, probably for non-canonical address 0xdead00000000008c: 0000 [#1] SMP NOPTI\n[ 3405.982083][T230589] CPU: 44 PID: 230589 Comm: kworker/44:3 Tainted: G           O      5.15.19-cloudflare-2022.2.1 #1\n[ 3405.998061][T230589] Hardware name: SUPA-COOL-SERV\n[ 3406.009552][T230589] Workqueue: mld mld_ifc_work\n[ 3406.017224][T230589] RIP: 0010:__ipv6_get_lladdr+0x34/0x60\n[ 3406.025780][T230589] Code: 57 10 48 83 c7 08 48 89 e5 48 39 d7 74 3e 48 8d 82 38 ff ff ff eb 13 48 8b 90 d0 00 00 00 48 8d 82 38 ff ff ff 48 39 d7 74 22 \u003c66\u003e 83 78 32 20 77 1b 75 e4 89 ca 23 50 2c 75 dd 48 8b 50 08 48 8b\n[ 3406.055748][T230589] RSP: 0018:ffff94e4b3fc3d10 EFLAGS: 00010202\n[ 3406.065617][T230589] RAX: dead00000000005a RBX: ffff94e4b3fc3d30 RCX: 0000000000000040\n[ 3406.077477][T230589] RDX: dead000000000122 RSI: ffff94e4b3fc3d30 RDI: ffff8c3a31431008\n[ 3406.089389][T230589] RBP: ffff94e4b3fc3d10 R08: 0000000000000000 R09: 0000000000000000\n[ 3406.101445][T230589] R10: ffff8c3a31430000 R11: 000000000000000b R12: ffff8c2c37887100\n[ 3406.113553][T230589] R13: ffff8c3a39537000 R14: 00000000000005dc R15: ffff8c3a31431000\n[ 3406.125730][T230589] FS:  0000000000000000(0000) GS:ffff8c3b9fc80000(0000) knlGS:0000000000000000\n[ 3406.138992][T230589] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 3406.149895][T230589] CR2: 00007f0dfea1db60 CR3: 000000387b5f2000 CR4: 0000000000350ee0\n[ 3406.162421][T230589] Call Trace:\n[ 3406.170235][T230589]  \u003cTASK\u003e\n[ 3406.177736][T230589]  mld_newpack+0xfe/0x1a0\n[ 3406.186686][T230589]  add_grhead+0x87/0xa0\n[ 3406.195498][T230589]  add_grec+0x485/0x4e0\n[ 3406.204310][T230589]  ? newidle_balance+0x126/0x3f0\n[ 3406.214024][T230589]  mld_ifc_work+0x15d/0x450\n[ 3406.223279][T230589]  process_one_work+0x1e6/0x380\n[ 3406.232982][T230589]  worker_thread+0x50/0x3a0\n[ 3406.242371][T230589]  ? rescuer_thread+0x360/0x360\n[ 3406.252175][T230589]  kthread+0x127/0x150\n[ 3406.261197][T230589]  ? set_kthread_struct+0x40/0x40\n[ 3406.271287][T230589]  ret_from_fork+0x22/0x30\n[ 3406.280812][T230589]  \u003c/TASK\u003e\n[ 3406.288937][T230589] Modules linked in: ... [last unloaded: kheaders]\n[ 3406.476714][T230589] ---[ end trace 3525a7655f2f3b9e ]---"
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e"
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          "url": "https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227"
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      "title": "ipv6: mcast: use rcu-safe version of ipv6_get_lladdr()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48785",
    "datePublished": "2024-07-16T11:13:21.118Z",
    "dateReserved": "2024-06-20T11:09:39.069Z",
    "dateUpdated": "2024-12-19T08:07:41.205Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-48785\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-16T12:15:03.493\",\"lastModified\":\"2024-11-21T07:34:01.110\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: mcast: use rcu-safe version of ipv6_get_lladdr()\\n\\nSome time ago 8965779d2c0e (\\\"ipv6,mcast: always hold idev-\u003elock before mca_lock\\\")\\nswitched ipv6_get_lladdr() to __ipv6_get_lladdr(), which is rcu-unsafe\\nversion. That was OK, because idev-\u003elock was held for these codepaths.\\n\\nIn 88e2ca308094 (\\\"mld: convert ifmcaddr6 to RCU\\\") these external locks were\\nremoved, so we probably need to restore the original rcu-safe call.\\n\\nOtherwise, we occasionally get a machine crashed/stalled with the following\\nin dmesg:\\n\\n[ 3405.966610][T230589] general protection fault, probably for non-canonical address 0xdead00000000008c: 0000 [#1] SMP NOPTI\\n[ 3405.982083][T230589] CPU: 44 PID: 230589 Comm: kworker/44:3 Tainted: G           O      5.15.19-cloudflare-2022.2.1 #1\\n[ 3405.998061][T230589] Hardware name: SUPA-COOL-SERV\\n[ 3406.009552][T230589] Workqueue: mld mld_ifc_work\\n[ 3406.017224][T230589] RIP: 0010:__ipv6_get_lladdr+0x34/0x60\\n[ 3406.025780][T230589] Code: 57 10 48 83 c7 08 48 89 e5 48 39 d7 74 3e 48 8d 82 38 ff ff ff eb 13 48 8b 90 d0 00 00 00 48 8d 82 38 ff ff ff 48 39 d7 74 22 \u003c66\u003e 83 78 32 20 77 1b 75 e4 89 ca 23 50 2c 75 dd 48 8b 50 08 48 8b\\n[ 3406.055748][T230589] RSP: 0018:ffff94e4b3fc3d10 EFLAGS: 00010202\\n[ 3406.065617][T230589] RAX: dead00000000005a RBX: ffff94e4b3fc3d30 RCX: 0000000000000040\\n[ 3406.077477][T230589] RDX: dead000000000122 RSI: ffff94e4b3fc3d30 RDI: ffff8c3a31431008\\n[ 3406.089389][T230589] RBP: ffff94e4b3fc3d10 R08: 0000000000000000 R09: 0000000000000000\\n[ 3406.101445][T230589] R10: ffff8c3a31430000 R11: 000000000000000b R12: ffff8c2c37887100\\n[ 3406.113553][T230589] R13: ffff8c3a39537000 R14: 00000000000005dc R15: ffff8c3a31431000\\n[ 3406.125730][T230589] FS:  0000000000000000(0000) GS:ffff8c3b9fc80000(0000) knlGS:0000000000000000\\n[ 3406.138992][T230589] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 3406.149895][T230589] CR2: 00007f0dfea1db60 CR3: 000000387b5f2000 CR4: 0000000000350ee0\\n[ 3406.162421][T230589] Call Trace:\\n[ 3406.170235][T230589]  \u003cTASK\u003e\\n[ 3406.177736][T230589]  mld_newpack+0xfe/0x1a0\\n[ 3406.186686][T230589]  add_grhead+0x87/0xa0\\n[ 3406.195498][T230589]  add_grec+0x485/0x4e0\\n[ 3406.204310][T230589]  ? newidle_balance+0x126/0x3f0\\n[ 3406.214024][T230589]  mld_ifc_work+0x15d/0x450\\n[ 3406.223279][T230589]  process_one_work+0x1e6/0x380\\n[ 3406.232982][T230589]  worker_thread+0x50/0x3a0\\n[ 3406.242371][T230589]  ? rescuer_thread+0x360/0x360\\n[ 3406.252175][T230589]  kthread+0x127/0x150\\n[ 3406.261197][T230589]  ? set_kthread_struct+0x40/0x40\\n[ 3406.271287][T230589]  ret_from_fork+0x22/0x30\\n[ 3406.280812][T230589]  \u003c/TASK\u003e\\n[ 3406.288937][T230589] Modules linked in: ... [last unloaded: kheaders]\\n[ 3406.476714][T230589] ---[ end trace 3525a7655f2f3b9e ]---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ipv6: mcast: use la versi\u00f3n rcu-safe de ipv6_get_lladdr() Hace alg\u00fan tiempo 8965779d2c0e (\\\"ipv6,mcast: siempre mantenga presionado idev-\u0026gt;lock antes de mca_lock\\\") cambi\u00f3 ipv6_get_lladdr() a __ipv6_get_lladdr(), que es una versi\u00f3n insegura para rcu. Eso estuvo bien, porque se mantuvo idev-\u0026gt;lock para estas rutas de c\u00f3digo. En 88e2ca308094 (\\\"mld: convert ifmcaddr6 to RCU\\\") se eliminaron estos bloqueos externos, por lo que probablemente necesitemos restaurar la llamada rcu-safe original. De lo contrario, ocasionalmente obtenemos una m\u00e1quina que falla o se bloquea con lo siguiente en dmesg: [3405.966610][T230589] falla de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdead00000000008c: 0000 [#1] SMP NOPTI [3405.982083][T230589] CPU: 44 PID: 230589 Comm: kworker/44:3 Tainted: GO 5.15.19-cloudflare-2022.2.1 #1 [ 3405.998061][T230589] Nombre de hardware: SUPA-COOL-SERV [ 3406.009552][T230589] Cola de trabajo: mld mld_ifc_work [ 3406 .017224 ][T230589] RIP: 0010:__ipv6_get_lladdr+0x34/0x60 [ 3406.025780][T230589] C\u00f3digo: 57 10 48 83 c7 08 48 89 e5 48 39 d7 74 3e 48 8d 82 38 ff ff ff eb 13 48 8b 90 d0 00 00 00 48 8d 82 38 ff ff ff 48 39 d7 74 22 \u0026lt;66\u0026gt; 83 78 32 20 77 1b 75 e4 89 ca 23 50 2c 75 dd 48 8b 50 08 48 8b [ 3406.055748][T230589] 0018:ffff94e4b3fc3d10 EFLAGS: 00010202 [ 3406.065617][T230589] RAX: muerto00000000005a RBX: ffff94e4b3fc3d30 RCX: 00000000000000040 [ 3406.077477][T230589] RDX: muerto0000000001 22 RSI: ffff94e4b3fc3d30 RDI: ffff8c3a31431008 [ 3406.089389][T230589] RBP: ffff94e4b3fc3d10 R08: 0000000000000000 R09: 0000000000000000000000 [ 34 06.101445][ T230589] R10: ffff8c3a31430000 R11: 000000000000000b R12: ffff8c2c37887100 [ 3406.113553][T230589] R13: ffff8c3a39537000 R14: 0000000000 0005dc R15: ffff8c3a31431000 [ 3406.125730][T230589] FS: 0000000000000000(0000) GS:ffff8c3b9fc80000(0000) knlGS:0000000000000000 [ 3406.1 38992] [T230589] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3406.149895][T230589] CR2: 00007f0dfea1db60 CR3: 000000387b5f2000 CR4: 0350ee0 [ 3406.162421][T230589] Seguimiento de llamadas: [ 3406.170235][T230589]  [ 3406.177736 ] [T230589] Mld_newpack+0xfe/0x1a0 [3406.186686] [T230589] add_grhead+0x87/0xa0 [3406.195498] [T230589] add_grec+0x485/0x4e0 [3406.204310] newidle_balance+0x126/0x3f0 [ 3406.214024][T230589] mld_ifc_work+0x15d/0x450 [ 3406.223279][T230589] Process_one_work+0x1e6/0x380 [ 3406.232982][T230589] +0x50/0x3a0 [ 3406.242371][T230589] ? hilo_rescate+0x360/0x360 [ 3406.252175][T230589] kthread+0x127/0x150 [ 3406.261197][T230589] ? set_kthread_struct+0x40/0x40 [ 3406.271287][T230589] ret_from_fork+0x22/0x30 [ 3406.280812][T230589]  [ 3406.288937][T230589] M\u00f3dulos vinculados en: ... [\u00faltima descarga: kheaders] 3406.476714][T230589 ] ---[ final de seguimiento 3525a7655f2f3b9e ]---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T15:25:01.616Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-48785\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T17:00:04.966004Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:21.733Z\"}}], \"cna\": {\"title\": \"ipv6: mcast: use rcu-safe version of ipv6_get_lladdr()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"88e2ca3080947fe22eb520c1f8231e79a105d011\", \"lessThan\": \"3e11ef1903cf6c2fba35594b193a3570854d9e9e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88e2ca3080947fe22eb520c1f8231e79a105d011\", \"lessThan\": \"27f567c84f446048670376827e356f9c92033bf9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"88e2ca3080947fe22eb520c1f8231e79a105d011\", \"lessThan\": \"26394fc118d6115390bd5b3a0fb17096271da227\", \"versionType\": \"git\"}], \"programFiles\": [\"include/net/addrconf.h\", \"net/ipv6/addrconf.c\", \"net/ipv6/mcast.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.13\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.13\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.25\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.16.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/net/addrconf.h\", \"net/ipv6/addrconf.c\", \"net/ipv6/mcast.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e\"}, {\"url\": \"https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9\"}, {\"url\": \"https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: mcast: use rcu-safe version of ipv6_get_lladdr()\\n\\nSome time ago 8965779d2c0e (\\\"ipv6,mcast: always hold idev-\u003elock before mca_lock\\\")\\nswitched ipv6_get_lladdr() to __ipv6_get_lladdr(), which is rcu-unsafe\\nversion. That was OK, because idev-\u003elock was held for these codepaths.\\n\\nIn 88e2ca308094 (\\\"mld: convert ifmcaddr6 to RCU\\\") these external locks were\\nremoved, so we probably need to restore the original rcu-safe call.\\n\\nOtherwise, we occasionally get a machine crashed/stalled with the following\\nin dmesg:\\n\\n[ 3405.966610][T230589] general protection fault, probably for non-canonical address 0xdead00000000008c: 0000 [#1] SMP NOPTI\\n[ 3405.982083][T230589] CPU: 44 PID: 230589 Comm: kworker/44:3 Tainted: G           O      5.15.19-cloudflare-2022.2.1 #1\\n[ 3405.998061][T230589] Hardware name: SUPA-COOL-SERV\\n[ 3406.009552][T230589] Workqueue: mld mld_ifc_work\\n[ 3406.017224][T230589] RIP: 0010:__ipv6_get_lladdr+0x34/0x60\\n[ 3406.025780][T230589] Code: 57 10 48 83 c7 08 48 89 e5 48 39 d7 74 3e 48 8d 82 38 ff ff ff eb 13 48 8b 90 d0 00 00 00 48 8d 82 38 ff ff ff 48 39 d7 74 22 \u003c66\u003e 83 78 32 20 77 1b 75 e4 89 ca 23 50 2c 75 dd 48 8b 50 08 48 8b\\n[ 3406.055748][T230589] RSP: 0018:ffff94e4b3fc3d10 EFLAGS: 00010202\\n[ 3406.065617][T230589] RAX: dead00000000005a RBX: ffff94e4b3fc3d30 RCX: 0000000000000040\\n[ 3406.077477][T230589] RDX: dead000000000122 RSI: ffff94e4b3fc3d30 RDI: ffff8c3a31431008\\n[ 3406.089389][T230589] RBP: ffff94e4b3fc3d10 R08: 0000000000000000 R09: 0000000000000000\\n[ 3406.101445][T230589] R10: ffff8c3a31430000 R11: 000000000000000b R12: ffff8c2c37887100\\n[ 3406.113553][T230589] R13: ffff8c3a39537000 R14: 00000000000005dc R15: ffff8c3a31431000\\n[ 3406.125730][T230589] FS:  0000000000000000(0000) GS:ffff8c3b9fc80000(0000) knlGS:0000000000000000\\n[ 3406.138992][T230589] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 3406.149895][T230589] CR2: 00007f0dfea1db60 CR3: 000000387b5f2000 CR4: 0000000000350ee0\\n[ 3406.162421][T230589] Call Trace:\\n[ 3406.170235][T230589]  \u003cTASK\u003e\\n[ 3406.177736][T230589]  mld_newpack+0xfe/0x1a0\\n[ 3406.186686][T230589]  add_grhead+0x87/0xa0\\n[ 3406.195498][T230589]  add_grec+0x485/0x4e0\\n[ 3406.204310][T230589]  ? newidle_balance+0x126/0x3f0\\n[ 3406.214024][T230589]  mld_ifc_work+0x15d/0x450\\n[ 3406.223279][T230589]  process_one_work+0x1e6/0x380\\n[ 3406.232982][T230589]  worker_thread+0x50/0x3a0\\n[ 3406.242371][T230589]  ? rescuer_thread+0x360/0x360\\n[ 3406.252175][T230589]  kthread+0x127/0x150\\n[ 3406.261197][T230589]  ? set_kthread_struct+0x40/0x40\\n[ 3406.271287][T230589]  ret_from_fork+0x22/0x30\\n[ 3406.280812][T230589]  \u003c/TASK\u003e\\n[ 3406.288937][T230589] Modules linked in: ... [last unloaded: kheaders]\\n[ 3406.476714][T230589] ---[ end trace 3525a7655f2f3b9e ]---\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:07:41.205Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-48785\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:07:41.205Z\", \"dateReserved\": \"2024-06-20T11:09:39.069Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-16T11:13:21.118Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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