cve-2021-47516
Vulnerability from cvelistv5
Published
2024-05-24 15:09
Modified
2024-12-19 07:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nfp: Fix memory leak in nfp_cpp_area_cache_add() In line 800 (#1), nfp_cpp_area_alloc() allocates and initializes a CPP area structure. But in line 807 (#2), when the cache is allocated failed, this CPP area structure is not freed, which will result in memory leak. We can fix it by freeing the CPP area when the cache is allocated failed (#2). 792 int nfp_cpp_area_cache_add(struct nfp_cpp *cpp, size_t size) 793 { 794 struct nfp_cpp_area_cache *cache; 795 struct nfp_cpp_area *area; 800 area = nfp_cpp_area_alloc(cpp, NFP_CPP_ID(7, NFP_CPP_ACTION_RW, 0), 801 0, size); // #1: allocates and initializes 802 if (!area) 803 return -ENOMEM; 805 cache = kzalloc(sizeof(*cache), GFP_KERNEL); 806 if (!cache) 807 return -ENOMEM; // #2: missing free 817 return 0; 818 }
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2e0e072e62fdaf7816220af08e05c020f0fcb77aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e93abcdcec0436fbf0b6a88ae806902426895a2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/484069b5de9d223cc1c64c6f80389a99cfef51f1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c56c96303e9289cc34716b1179597b6f470833dePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eb51f639ef3fd5498b7def290ed8681b6aadd9a7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f707820c09239d6f67699d9b2ff57863cc7905b0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2e0e072e62fdaf7816220af08e05c020f0fcb77aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3e93abcdcec0436fbf0b6a88ae806902426895a2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/484069b5de9d223cc1c64c6f80389a99cfef51f1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c56c96303e9289cc34716b1179597b6f470833dePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/eb51f639ef3fd5498b7def290ed8681b6aadd9a7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f707820c09239d6f67699d9b2ff57863cc7905b0Patch
Impacted products
Vendor Product Version
Linux Linux Version: 4.11
Show details on NVD website

To clipboard 

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But in line 807 (#2), when the cache is allocated\\nfailed, this CPP area structure is not freed, which will result in\\nmemory leak.\\n\\nWe can fix it by freeing the CPP area when the cache is allocated\\nfailed (#2).\\n\\n792 int nfp_cpp_area_cache_add(struct nfp_cpp *cpp, size_t size)\\n793 {\\n794 \\tstruct nfp_cpp_area_cache *cache;\\n795 \\tstruct nfp_cpp_area *area;\\n\\n800\\tarea = nfp_cpp_area_alloc(cpp, NFP_CPP_ID(7, NFP_CPP_ACTION_RW, 0),\\n801 \\t\\t\\t\\t  0, size);\\n\\t// #1: allocates and initializes\\n\\n802 \\tif (!area)\\n803 \\t\\treturn -ENOMEM;\\n\\n805 \\tcache = kzalloc(sizeof(*cache), GFP_KERNEL);\\n806 \\tif (!cache)\\n807 \\t\\treturn -ENOMEM; // #2: missing free\\n\\n817\\treturn 0;\\n818 }\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: nfp: corrige la p\u00e9rdida de memoria en nfp_cpp_area_cache_add() En la l\u00ednea 800 (#1), nfp_cpp_area_alloc() asigna e inicializa una estructura de \u00e1rea CPP. 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}


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