{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not BUG_ON in link_to_fixup_dir\n\nWhile doing error injection testing I got the following panic\n\n  kernel BUG at fs/btrfs/tree-log.c:1862!\n  invalid opcode: 0000 [#1] SMP NOPTI\n  CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014\n  RIP: 0010:link_to_fixup_dir+0xd5/0xe0\n  RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216\n  RAX: fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0\n  RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000\n  RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001\n  R10: 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800\n  R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065\n  FS:  00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0\n  Call Trace:\n   replay_one_buffer+0x409/0x470\n   ? btree_read_extent_buffer_pages+0xd0/0x110\n   walk_up_log_tree+0x157/0x1e0\n   walk_log_tree+0xa6/0x1d0\n   btrfs_recover_log_trees+0x1da/0x360\n   ? replay_one_extent+0x7b0/0x7b0\n   open_ctree+0x1486/0x1720\n   btrfs_mount_root.cold+0x12/0xea\n   ? __kmalloc_track_caller+0x12f/0x240\n   legacy_get_tree+0x24/0x40\n   vfs_get_tree+0x22/0xb0\n   vfs_kern_mount.part.0+0x71/0xb0\n   btrfs_mount+0x10d/0x380\n   ? vfs_parse_fs_string+0x4d/0x90\n   legacy_get_tree+0x24/0x40\n   vfs_get_tree+0x22/0xb0\n   path_mount+0x433/0xa10\n   __x64_sys_mount+0xe3/0x120\n   do_syscall_64+0x3d/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nWe can get -EIO or any number of legitimate errors from\nbtrfs_search_slot(), panicing here is not the appropriate response.  The\nerror path for this code handles errors properly, simply return the\nerror."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/btrfs/tree-log.c"
               ],
               "versions": [
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "76bfd8ac20be",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "e934c4ee17b3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "0eaf383c6a4a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "6eccfb28f8dc",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "0ed102453aa1",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "7e13db503918",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "b54544213358",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "1da177e4c3f4",
                     "lessThan": "91df99a6eb50",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/btrfs/tree-log.c"
               ],
               "versions": [
                  {
                     "version": "4.4.271",
                     "lessThanOrEqual": "4.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.9.271",
                     "lessThanOrEqual": "4.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.14.235",
                     "lessThanOrEqual": "4.14.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.193",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.124",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.42",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.12.9",
                     "lessThanOrEqual": "5.12.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.13",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf"
            },
            {
               "url": "https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40"
            },
            {
               "url": "https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611"
            },
            {
               "url": "https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa"
            },
            {
               "url": "https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003"
            },
            {
               "url": "https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a"
            },
            {
               "url": "https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c"
            },
            {
               "url": "https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d"
            }
         ],
         "title": "btrfs: do not BUG_ON in link_to_fixup_dir",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2021-47145",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}