cve-2024-56624
Vulnerability from cvelistv5
Published
2024-12-27 14:51
Modified
2025-01-20 06:24
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix out_fput in iommufd_fault_alloc() As fput() calls the file->f_op->release op, where fault obj and ictx are getting released, there is no need to release these two after fput() one more time, which would result in imbalanced refcounts: refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 48 PID: 2369 at lib/refcount.c:31 refcount_warn_saturate+0x60/0x230 Call trace: refcount_warn_saturate+0x60/0x230 (P) refcount_warn_saturate+0x60/0x230 (L) iommufd_fault_fops_release+0x9c/0xe0 [iommufd] ... VFS: Close: file count is 0 (f_op=iommufd_fops [iommufd]) WARNING: CPU: 48 PID: 2369 at fs/open.c:1507 filp_flush+0x3c/0xf0 Call trace: filp_flush+0x3c/0xf0 (P) filp_flush+0x3c/0xf0 (L) __arm64_sys_close+0x34/0x98 ... imbalanced put on file reference count WARNING: CPU: 48 PID: 2369 at fs/file.c:74 __file_ref_put+0x100/0x138 Call trace: __file_ref_put+0x100/0x138 (P) __file_ref_put+0x100/0x138 (L) __fput_sync+0x4c/0xd0 Drop those two lines to fix the warnings above.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472
Impacted products
Vendor Product Version
Linux Linux Version: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed
Version: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed
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   Linux Linux Version: 6.11
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{
   containers: {
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "drivers/iommu/iommufd/fault.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d",
                     status: "affected",
                     version: "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
                     versionType: "git",
                  },
                  {
                     lessThan: "af7f4780514f850322b2959032ecaa96e4b26472",
                     status: "affected",
                     version: "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "drivers/iommu/iommufd/fault.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "6.11",
                  },
                  {
                     lessThan: "6.11",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.12.*",
                     status: "unaffected",
                     version: "6.12.5",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "6.13",
                     versionType: "original_commit_for_fix",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Fix out_fput in iommufd_fault_alloc()\n\nAs fput() calls the file->f_op->release op, where fault obj and ictx are\ngetting released, there is no need to release these two after fput() one\nmore time, which would result in imbalanced refcounts:\n  refcount_t: decrement hit 0; leaking memory.\n  WARNING: CPU: 48 PID: 2369 at lib/refcount.c:31 refcount_warn_saturate+0x60/0x230\n  Call trace:\n   refcount_warn_saturate+0x60/0x230 (P)\n   refcount_warn_saturate+0x60/0x230 (L)\n   iommufd_fault_fops_release+0x9c/0xe0 [iommufd]\n  ...\n  VFS: Close: file count is 0 (f_op=iommufd_fops [iommufd])\n  WARNING: CPU: 48 PID: 2369 at fs/open.c:1507 filp_flush+0x3c/0xf0\n  Call trace:\n   filp_flush+0x3c/0xf0 (P)\n   filp_flush+0x3c/0xf0 (L)\n   __arm64_sys_close+0x34/0x98\n  ...\n  imbalanced put on file reference count\n  WARNING: CPU: 48 PID: 2369 at fs/file.c:74 __file_ref_put+0x100/0x138\n  Call trace:\n   __file_ref_put+0x100/0x138 (P)\n   __file_ref_put+0x100/0x138 (L)\n   __fput_sync+0x4c/0xd0\n\nDrop those two lines to fix the warnings above.",
            },
         ],
         providerMetadata: {
            dateUpdated: "2025-01-20T06:24:22.938Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d",
            },
            {
               url: "https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472",
            },
         ],
         title: "iommufd: Fix out_fput in iommufd_fault_alloc()",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-56624",
      datePublished: "2024-12-27T14:51:27.318Z",
      dateReserved: "2024-12-27T14:03:06.017Z",
      dateUpdated: "2025-01-20T06:24:22.938Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2024-56624\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T15:15:21.933\",\"lastModified\":\"2024-12-27T15:15:21.933\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niommufd: Fix out_fput in iommufd_fault_alloc()\\n\\nAs fput() calls the file->f_op->release op, where fault obj and ictx are\\ngetting released, there is no need to release these two after fput() one\\nmore time, which would result in imbalanced refcounts:\\n  refcount_t: decrement hit 0; leaking memory.\\n  WARNING: CPU: 48 PID: 2369 at lib/refcount.c:31 refcount_warn_saturate+0x60/0x230\\n  Call trace:\\n   refcount_warn_saturate+0x60/0x230 (P)\\n   refcount_warn_saturate+0x60/0x230 (L)\\n   iommufd_fault_fops_release+0x9c/0xe0 [iommufd]\\n  ...\\n  VFS: Close: file count is 0 (f_op=iommufd_fops [iommufd])\\n  WARNING: CPU: 48 PID: 2369 at fs/open.c:1507 filp_flush+0x3c/0xf0\\n  Call trace:\\n   filp_flush+0x3c/0xf0 (P)\\n   filp_flush+0x3c/0xf0 (L)\\n   __arm64_sys_close+0x34/0x98\\n  ...\\n  imbalanced put on file reference count\\n  WARNING: CPU: 48 PID: 2369 at fs/file.c:74 __file_ref_put+0x100/0x138\\n  Call trace:\\n   __file_ref_put+0x100/0x138 (P)\\n   __file_ref_put+0x100/0x138 (L)\\n   __fput_sync+0x4c/0xd0\\n\\nDrop those two lines to fix the warnings above.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2b3f30c8edbf9a122ce01f13f0f41fbca5f1d41d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af7f4780514f850322b2959032ecaa96e4b26472\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
   },
}


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