cve-2023-52772
Vulnerability from cvelistv5
Published
2024-05-21 15:30
Modified
2024-11-04 14:52
Severity ?
Summary
af_unix: fix use-after-free in unix_stream_read_actor()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/069a3ec329ff43e7869a3d94c62cd03203016bcePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b7b492615cf3017190f55444f7016812b66611dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75bcfc188abf4fae9c1d5f5dc0a03540be602eefPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d179189eec426fe4801e4b91efa1889faed12700Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eae0b295ce16d8c8b4114c3037993191b4bb92f0Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: fix use-after-free in unix_stream_read_actor()\n\nsyzbot reported the following crash [1]\n\nAfter releasing unix socket lock, u-\u003eoob_skb can be changed\nby another thread. We must temporarily increase skb refcount\nto make sure this other thread will not free the skb under us.\n\n[1]\n\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\nRead of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297\n\nCPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\nCall Trace:\n\u003cTASK\u003e\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\nprint_address_description mm/kasan/report.c:364 [inline]\nprint_report+0xc4/0x620 mm/kasan/report.c:475\nkasan_report+0xda/0x110 mm/kasan/report.c:588\nunix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\nunix_stream_recv_urg net/unix/af_unix.c:2587 [inline]\nunix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666\nunix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903\nsock_recvmsg_nosec net/socket.c:1044 [inline]\nsock_recvmsg+0xe2/0x170 net/socket.c:1066\n____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803\n___sys_recvmsg+0x115/0x1a0 net/socket.c:2845\n__sys_recvmsg+0x114/0x1e0 net/socket.c:2875\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\nRIP: 0033:0x7fc67492c559\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\nRAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559\nRDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004\nRBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340\nR13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388\n\u003c/TASK\u003e\n\nAllocated by task 5295:\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\n__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328\nkasan_slab_alloc include/linux/kasan.h:188 [inline]\nslab_post_alloc_hook mm/slab.h:763 [inline]\nslab_alloc_node mm/slub.c:3478 [inline]\nkmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523\n__alloc_skb+0x287/0x330 net/core/skbuff.c:641\nalloc_skb include/linux/skbuff.h:1286 [inline]\nalloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331\nsock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780\nsock_alloc_send_skb include/net/sock.h:1884 [inline]\nqueue_oob net/unix/af_unix.c:2147 [inline]\nunix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301\nsock_sendmsg_nosec net/socket.c:730 [inline]\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2667\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nFreed by task 5295:\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\nkasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522\n____kasan_slab_free mm/kasan/common.c:236 [inline]\n____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200\nkasan_slab_free include/linux/kasan.h:164 [inline]\nslab_free_hook mm/slub.c:1800 [inline]\nslab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826\nslab_free mm/slub.c:3809 [inline]\nkmem_cache_free+0xf8/0x340 mm/slub.c:3831\nkfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015\n__kfree_skb net/core/skbuff.c:1073 [inline]\nconsume_skb net/core/skbuff.c:1288 [inline]\nconsume_skb+0xdf/0x170 net/core/skbuff.c:1282\nqueue_oob net/unix/af_unix.c:2178 [inline]\nu\n---truncated---"
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        "dateUpdated": "2024-11-04T14:52:24.307Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/75bcfc188abf4fae9c1d5f5dc0a03540be602eef"
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          "url": "https://git.kernel.org/stable/c/d179189eec426fe4801e4b91efa1889faed12700"
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      "title": "af_unix: fix use-after-free in unix_stream_read_actor()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52772",
    "datePublished": "2024-05-21T15:30:54.292Z",
    "dateReserved": "2024-05-21T15:19:24.239Z",
    "dateUpdated": "2024-11-04T14:52:24.307Z",
    "state": "PUBLISHED"
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  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52772\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T16:15:16.390\",\"lastModified\":\"2024-05-24T01:13:24.097\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naf_unix: fix use-after-free in unix_stream_read_actor()\\n\\nsyzbot reported the following crash [1]\\n\\nAfter releasing unix socket lock, u-\u003eoob_skb can be changed\\nby another thread. We must temporarily increase skb refcount\\nto make sure this other thread will not free the skb under us.\\n\\n[1]\\n\\nBUG: KASAN: slab-use-after-free in unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nRead of size 4 at addr ffff88801f3b9cc4 by task syz-executor107/5297\\n\\nCPU: 1 PID: 5297 Comm: syz-executor107 Not tainted 6.6.0-syzkaller-15910-gb8e3a87a627b #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023\\nCall Trace:\\n\u003cTASK\u003e\\n__dump_stack lib/dump_stack.c:88 [inline]\\ndump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\\nprint_address_description mm/kasan/report.c:364 [inline]\\nprint_report+0xc4/0x620 mm/kasan/report.c:475\\nkasan_report+0xda/0x110 mm/kasan/report.c:588\\nunix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866\\nunix_stream_recv_urg net/unix/af_unix.c:2587 [inline]\\nunix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666\\nunix_stream_recvmsg+0x189/0x1b0 net/unix/af_unix.c:2903\\nsock_recvmsg_nosec net/socket.c:1044 [inline]\\nsock_recvmsg+0xe2/0x170 net/socket.c:1066\\n____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803\\n___sys_recvmsg+0x115/0x1a0 net/socket.c:2845\\n__sys_recvmsg+0x114/0x1e0 net/socket.c:2875\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\nRIP: 0033:0x7fc67492c559\\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\\nRSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\\nRAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559\\nRDX: 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004\\nRBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0\\nR10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340\\nR13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388\\n\u003c/TASK\u003e\\n\\nAllocated by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\n__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328\\nkasan_slab_alloc include/linux/kasan.h:188 [inline]\\nslab_post_alloc_hook mm/slab.h:763 [inline]\\nslab_alloc_node mm/slub.c:3478 [inline]\\nkmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523\\n__alloc_skb+0x287/0x330 net/core/skbuff.c:641\\nalloc_skb include/linux/skbuff.h:1286 [inline]\\nalloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331\\nsock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780\\nsock_alloc_send_skb include/net/sock.h:1884 [inline]\\nqueue_oob net/unix/af_unix.c:2147 [inline]\\nunix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301\\nsock_sendmsg_nosec net/socket.c:730 [inline]\\n__sock_sendmsg+0xd5/0x180 net/socket.c:745\\n____sys_sendmsg+0x6ac/0x940 net/socket.c:2584\\n___sys_sendmsg+0x135/0x1d0 net/socket.c:2638\\n__sys_sendmsg+0x117/0x1e0 net/socket.c:2667\\ndo_syscall_x64 arch/x86/entry/common.c:51 [inline]\\ndo_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82\\nentry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nFreed by task 5295:\\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:45\\nkasan_set_track+0x25/0x30 mm/kasan/common.c:52\\nkasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522\\n____kasan_slab_free mm/kasan/common.c:236 [inline]\\n____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200\\nkasan_slab_free include/linux/kasan.h:164 [inline]\\nslab_free_hook mm/slub.c:1800 [inline]\\nslab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826\\nslab_free mm/slub.c:3809 [inline]\\nkmem_cache_free+0xf8/0x340 mm/slub.c:3831\\nkfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015\\n__kfree_skb net/core/skbuff.c:1073 [inline]\\nconsume_skb net/core/skbuff.c:1288 [inline]\\nconsume_skb+0xdf/0x170 net/core/skbuff.c:1282\\nqueue_oob net/unix/af_unix.c:2178 [inline]\\nu\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: af_unix: corrige use-after-free en unix_stream_read_actor() syzbot inform\u00f3 el siguiente bloqueo [1] Despu\u00e9s de liberar el bloqueo del socket Unix, otro subproceso puede cambiar u-\u0026gt;oob_skb. Debemos aumentar temporalmente el recuento de skb para asegurarnos de que este otro hilo no libere el skb que est\u00e1 debajo de nosotros. [1] ERROR: KASAN: slab-use-after-free en unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff88801f3b9cc4 por tarea syz-executor107/5297 CPU: 1 PID: 5297 Comm : syz-executor107 No contaminado 6.6.0-syzkaller-15910-gb8e3a87a627b #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/10/2023 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [en l\u00ednea] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan /report.c:588 unix_stream_read_actor+0xa7/0xc0 net/unix/af_unix.c:2866 unix_stream_recv_urg net/unix/af_unix.c:2587 [en l\u00ednea] unix_stream_read_generic+0x19a5/0x2480 net/unix/af_unix.c:2666 +0x189 /0x1b0 net/unix/af_unix.c:2903 sock_recvmsg_nosec net/socket.c:1044 [en l\u00ednea] sock_recvmsg+0xe2/0x170 net/socket.c:1066 ____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803 ___sys_recv mensaje+0x115/ 0x1a0 net/socket.c:2845 __sys_recvmsg+0x114/0x1e0 net/socket.c:2875 do_syscall_x64 arch/x86/entry/common.c:51 [en l\u00ednea] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c: 82 Entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fc67492c559 C\u00f3digo: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d 6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6748ab228 EFLAGS: 00000246 ORIG_RAX: 0000002f RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007fc67492c559 RDX : 0000000040010083 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fc6749b6348 R08: 00007fc6748ab6c0 R09: 00007fc6748ab6c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6749b6340 R13: 00007fc6749b634c R14: 00007ffe9fac52a0 R15: 00007ffe9fac5388  tarea 5295: kasan_save_stack+0x33/0x50 mm /kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [en l\u00ednea] slab_post_alloc_hook mm/slab.h:763 [en l\u00ednea] slab_alloc_node mm/slub.c:3478 [en l\u00ednea] kmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523 __alloc_skb+0x287/0x330 net/core/skbuff.c:641 alloc_skb include/ linux/skbuff.h:1286 [en l\u00ednea] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780 sock_alloc_send_skb include/net/sock.h:1884 [en l\u00ednea ] queue_oob net/unix/af_unix.c:2147 [en l\u00ednea] unix_stream_sendmsg+0xb5f/0x10a0 net/unix/af_unix.c:2301 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg+0xd5/0x180 net/socket.c: 745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/ common.c:51 [ Inline] do_syscall_64+0x3f/0x110 Arch/x86/entry/Common.c: 82 entry_syscall_64_after_hwframe+0x63/0x6b liberado por tarea 5295: kasan_save_stack+0x33/0x50 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [en l\u00ednea] ____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/ linux/kasan.h:164 [en l\u00ednea] slab_free_hook mm/slub.c:1800 [en l\u00ednea] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [en l\u00ednea] kmem_cache_free+0xf8/0x340 mm /slub.c:3831 kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1015 __kfree_skb net/core/skbuff.c:1073 [en l\u00ednea] consume_skb net/core/skbuff.c:1288 [en l\u00ednea] consume_skb+0xdf/ 0x170 net/core/skbuff.c:1282 queue_oob net/unix/af_unix.c:2178 [en l\u00ednea] u ---truncado---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15\",\"versionEndExcluding\":\"5.15.140\",\"matchCriteriaId\":\"8A5D0FDE-F72D-44B7-B376-4D382F5A5AE1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.64\",\"matchCriteriaId\":\"8D7C884A-CAA2-4EA2-9FEB-5CE776D7B05F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.5.13\",\"matchCriteriaId\":\"674C4F82-C336-4B49-BF64-1DE422E889C4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6\",\"versionEndExcluding\":\"6.6.3\",\"matchCriteriaId\":\"B58252FA-A49C-411F-9B28-DC5FE44BC5A0\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/069a3ec329ff43e7869a3d94c62cd03203016bce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4b7b492615cf3017190f55444f7016812b66611d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/75bcfc188abf4fae9c1d5f5dc0a03540be602eef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d179189eec426fe4801e4b91efa1889faed12700\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/eae0b295ce16d8c8b4114c3037993191b4bb92f0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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