cve-2024-56548
Vulnerability from cvelistv5
Published
2024-12-27 14:11
Modified
2025-01-20 06:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: hfsplus: don't query the device logical block size multiple times Devices block sizes may change. One of these cases is a loop device by using ioctl LOOP_SET_BLOCK_SIZE. While this may cause other issues like IO being rejected, in the case of hfsplus, it will allocate a block by using that size and potentially write out-of-bounds when hfsplus_read_wrapper calls hfsplus_submit_bio and the latter function reads a different io_size. Using a new min_io_size initally set to sb_min_blocksize works for the purposes of the original fix, since it will be set to the max between HFSPLUS_SECTOR_SIZE and the first seen logical block size. We still use the max between HFSPLUS_SECTOR_SIZE and min_io_size in case the latter is not initialized. Tested by mounting an hfsplus filesystem with loop block sizes 512, 1024 and 4096. The produced KASAN report before the fix looks like this: [ 419.944641] ================================================================== [ 419.945655] BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0x659/0xa0a [ 419.946703] Read of size 2 at addr ffff88800721fc00 by task repro/10678 [ 419.947612] [ 419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro Not tainted 6.12.0-rc5-00008-gdf56e0f2f3ca #84 [ 419.949007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 [ 419.950035] Call Trace: [ 419.950384] <TASK> [ 419.950676] dump_stack_lvl+0x57/0x78 [ 419.951212] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.951830] print_report+0x14c/0x49e [ 419.952361] ? __virt_addr_valid+0x267/0x278 [ 419.952979] ? kmem_cache_debug_flags+0xc/0x1d [ 419.953561] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.954231] kasan_report+0x89/0xb0 [ 419.954748] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.955367] hfsplus_read_wrapper+0x659/0xa0a [ 419.955948] ? __pfx_hfsplus_read_wrapper+0x10/0x10 [ 419.956618] ? do_raw_spin_unlock+0x59/0x1a9 [ 419.957214] ? _raw_spin_unlock+0x1a/0x2e [ 419.957772] hfsplus_fill_super+0x348/0x1590 [ 419.958355] ? hlock_class+0x4c/0x109 [ 419.958867] ? __pfx_hfsplus_fill_super+0x10/0x10 [ 419.959499] ? __pfx_string+0x10/0x10 [ 419.960006] ? lock_acquire+0x3e2/0x454 [ 419.960532] ? bdev_name.constprop.0+0xce/0x243 [ 419.961129] ? __pfx_bdev_name.constprop.0+0x10/0x10 [ 419.961799] ? pointer+0x3f0/0x62f [ 419.962277] ? __pfx_pointer+0x10/0x10 [ 419.962761] ? vsnprintf+0x6c4/0xfba [ 419.963178] ? __pfx_vsnprintf+0x10/0x10 [ 419.963621] ? setup_bdev_super+0x376/0x3b3 [ 419.964029] ? snprintf+0x9d/0xd2 [ 419.964344] ? __pfx_snprintf+0x10/0x10 [ 419.964675] ? lock_acquired+0x45c/0x5e9 [ 419.965016] ? set_blocksize+0x139/0x1c1 [ 419.965381] ? sb_set_blocksize+0x6d/0xae [ 419.965742] ? __pfx_hfsplus_fill_super+0x10/0x10 [ 419.966179] mount_bdev+0x12f/0x1bf [ 419.966512] ? __pfx_mount_bdev+0x10/0x10 [ 419.966886] ? vfs_parse_fs_string+0xce/0x111 [ 419.967293] ? __pfx_vfs_parse_fs_string+0x10/0x10 [ 419.967702] ? __pfx_hfsplus_mount+0x10/0x10 [ 419.968073] legacy_get_tree+0x104/0x178 [ 419.968414] vfs_get_tree+0x86/0x296 [ 419.968751] path_mount+0xba3/0xd0b [ 419.969157] ? __pfx_path_mount+0x10/0x10 [ 419.969594] ? kmem_cache_free+0x1e2/0x260 [ 419.970311] do_mount+0x99/0xe0 [ 419.970630] ? __pfx_do_mount+0x10/0x10 [ 419.971008] __do_sys_mount+0x199/0x1c9 [ 419.971397] do_syscall_64+0xd0/0x135 [ 419.971761] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 419.972233] RIP: 0033:0x7c3cb812972e [ 419.972564] Code: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01 48 [ 419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e [ 419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI: ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/06cbfbb13ac88f4154c2eb4bc4176f9d10139847Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c82587cb57687de3f18ab4b98a8850c789bedcfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21900e8478126ff6afe3b66679f676e74d1f8830Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2667c9b7b76efcbc7adbfea249892f20c313b0daPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d7bda75e1a6239db053c73acde17ca146317824Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfeecda050aa9376f642d5b2a71c4112cc6c8216Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f57725bcc5816425e25218fdf5fb6923bc578cdfPatch
Impacted products
Vendor Product Version
Linux Linux Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
Version: 6596528e391ad978a6a120142cba97a1d7324cb6
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{
   containers: {
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "fs/hfsplus/hfsplus_fs.h",
                  "fs/hfsplus/wrapper.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "f57725bcc5816425e25218fdf5fb6923bc578cdf",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "06cbfbb13ac88f4154c2eb4bc4176f9d10139847",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "3d7bda75e1a6239db053c73acde17ca146317824",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "21900e8478126ff6afe3b66679f676e74d1f8830",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "2667c9b7b76efcbc7adbfea249892f20c313b0da",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "bfeecda050aa9376f642d5b2a71c4112cc6c8216",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
                  {
                     lessThan: "1c82587cb57687de3f18ab4b98a8850c789bedcf",
                     status: "affected",
                     version: "6596528e391ad978a6a120142cba97a1d7324cb6",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "fs/hfsplus/hfsplus_fs.h",
                  "fs/hfsplus/wrapper.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "3.1",
                  },
                  {
                     lessThan: "3.1",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "4.19.*",
                     status: "unaffected",
                     version: "4.19.325",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.4.*",
                     status: "unaffected",
                     version: "5.4.287",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.10.*",
                     status: "unaffected",
                     version: "5.10.231",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.15.*",
                     status: "unaffected",
                     version: "5.15.174",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.1.*",
                     status: "unaffected",
                     version: "6.1.120",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.6.*",
                     status: "unaffected",
                     version: "6.6.64",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.11.*",
                     status: "unaffected",
                     version: "6.11.11",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.12.*",
                     status: "unaffected",
                     version: "6.12.2",
                     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\nhfsplus: don't query the device logical block size multiple times\n\nDevices block sizes may change. One of these cases is a loop device by\nusing ioctl LOOP_SET_BLOCK_SIZE.\n\nWhile this may cause other issues like IO being rejected, in the case of\nhfsplus, it will allocate a block by using that size and potentially write\nout-of-bounds when hfsplus_read_wrapper calls hfsplus_submit_bio and the\nlatter function reads a different io_size.\n\nUsing a new min_io_size initally set to sb_min_blocksize works for the\npurposes of the original fix, since it will be set to the max between\nHFSPLUS_SECTOR_SIZE and the first seen logical block size. We still use the\nmax between HFSPLUS_SECTOR_SIZE and min_io_size in case the latter is not\ninitialized.\n\nTested by mounting an hfsplus filesystem with loop block sizes 512, 1024\nand 4096.\n\nThe produced KASAN report before the fix looks like this:\n\n[  419.944641] ==================================================================\n[  419.945655] BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0x659/0xa0a\n[  419.946703] Read of size 2 at addr ffff88800721fc00 by task repro/10678\n[  419.947612]\n[  419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro Not tainted 6.12.0-rc5-00008-gdf56e0f2f3ca #84\n[  419.949007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\n[  419.950035] Call Trace:\n[  419.950384]  <TASK>\n[  419.950676]  dump_stack_lvl+0x57/0x78\n[  419.951212]  ? hfsplus_read_wrapper+0x659/0xa0a\n[  419.951830]  print_report+0x14c/0x49e\n[  419.952361]  ? __virt_addr_valid+0x267/0x278\n[  419.952979]  ? kmem_cache_debug_flags+0xc/0x1d\n[  419.953561]  ? hfsplus_read_wrapper+0x659/0xa0a\n[  419.954231]  kasan_report+0x89/0xb0\n[  419.954748]  ? hfsplus_read_wrapper+0x659/0xa0a\n[  419.955367]  hfsplus_read_wrapper+0x659/0xa0a\n[  419.955948]  ? __pfx_hfsplus_read_wrapper+0x10/0x10\n[  419.956618]  ? do_raw_spin_unlock+0x59/0x1a9\n[  419.957214]  ? _raw_spin_unlock+0x1a/0x2e\n[  419.957772]  hfsplus_fill_super+0x348/0x1590\n[  419.958355]  ? hlock_class+0x4c/0x109\n[  419.958867]  ? __pfx_hfsplus_fill_super+0x10/0x10\n[  419.959499]  ? __pfx_string+0x10/0x10\n[  419.960006]  ? lock_acquire+0x3e2/0x454\n[  419.960532]  ? bdev_name.constprop.0+0xce/0x243\n[  419.961129]  ? __pfx_bdev_name.constprop.0+0x10/0x10\n[  419.961799]  ? pointer+0x3f0/0x62f\n[  419.962277]  ? __pfx_pointer+0x10/0x10\n[  419.962761]  ? vsnprintf+0x6c4/0xfba\n[  419.963178]  ? __pfx_vsnprintf+0x10/0x10\n[  419.963621]  ? setup_bdev_super+0x376/0x3b3\n[  419.964029]  ? snprintf+0x9d/0xd2\n[  419.964344]  ? __pfx_snprintf+0x10/0x10\n[  419.964675]  ? lock_acquired+0x45c/0x5e9\n[  419.965016]  ? set_blocksize+0x139/0x1c1\n[  419.965381]  ? sb_set_blocksize+0x6d/0xae\n[  419.965742]  ? __pfx_hfsplus_fill_super+0x10/0x10\n[  419.966179]  mount_bdev+0x12f/0x1bf\n[  419.966512]  ? __pfx_mount_bdev+0x10/0x10\n[  419.966886]  ? vfs_parse_fs_string+0xce/0x111\n[  419.967293]  ? __pfx_vfs_parse_fs_string+0x10/0x10\n[  419.967702]  ? __pfx_hfsplus_mount+0x10/0x10\n[  419.968073]  legacy_get_tree+0x104/0x178\n[  419.968414]  vfs_get_tree+0x86/0x296\n[  419.968751]  path_mount+0xba3/0xd0b\n[  419.969157]  ? __pfx_path_mount+0x10/0x10\n[  419.969594]  ? kmem_cache_free+0x1e2/0x260\n[  419.970311]  do_mount+0x99/0xe0\n[  419.970630]  ? __pfx_do_mount+0x10/0x10\n[  419.971008]  __do_sys_mount+0x199/0x1c9\n[  419.971397]  do_syscall_64+0xd0/0x135\n[  419.971761]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[  419.972233] RIP: 0033:0x7c3cb812972e\n[  419.972564] Code: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01 48\n[  419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5\n[  419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e\n[  419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI:\n---truncated---",
            },
         ],
         providerMetadata: {
            dateUpdated: "2025-01-20T06:22:41.293Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8",
            },
            {
               url: "https://git.kernel.org/stable/c/f57725bcc5816425e25218fdf5fb6923bc578cdf",
            },
            {
               url: "https://git.kernel.org/stable/c/e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866",
            },
            {
               url: "https://git.kernel.org/stable/c/06cbfbb13ac88f4154c2eb4bc4176f9d10139847",
            },
            {
               url: "https://git.kernel.org/stable/c/3d7bda75e1a6239db053c73acde17ca146317824",
            },
            {
               url: "https://git.kernel.org/stable/c/21900e8478126ff6afe3b66679f676e74d1f8830",
            },
            {
               url: "https://git.kernel.org/stable/c/2667c9b7b76efcbc7adbfea249892f20c313b0da",
            },
            {
               url: "https://git.kernel.org/stable/c/bfeecda050aa9376f642d5b2a71c4112cc6c8216",
            },
            {
               url: "https://git.kernel.org/stable/c/1c82587cb57687de3f18ab4b98a8850c789bedcf",
            },
         ],
         title: "hfsplus: don't query the device logical block size multiple times",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-56548",
      datePublished: "2024-12-27T14:11:29.373Z",
      dateReserved: "2024-12-27T14:03:05.989Z",
      dateUpdated: "2025-01-20T06:22:41.293Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2024-56548\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T14:15:34.603\",\"lastModified\":\"2025-03-06T12:42:52.363\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nhfsplus: don't query the device logical block size multiple times\\n\\nDevices block sizes may change. One of these cases is a loop device by\\nusing ioctl LOOP_SET_BLOCK_SIZE.\\n\\nWhile this may cause other issues like IO being rejected, in the case of\\nhfsplus, it will allocate a block by using that size and potentially write\\nout-of-bounds when hfsplus_read_wrapper calls hfsplus_submit_bio and the\\nlatter function reads a different io_size.\\n\\nUsing a new min_io_size initally set to sb_min_blocksize works for the\\npurposes of the original fix, since it will be set to the max between\\nHFSPLUS_SECTOR_SIZE and the first seen logical block size. We still use the\\nmax between HFSPLUS_SECTOR_SIZE and min_io_size in case the latter is not\\ninitialized.\\n\\nTested by mounting an hfsplus filesystem with loop block sizes 512, 1024\\nand 4096.\\n\\nThe produced KASAN report before the fix looks like this:\\n\\n[  419.944641] ==================================================================\\n[  419.945655] BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0x659/0xa0a\\n[  419.946703] Read of size 2 at addr ffff88800721fc00 by task repro/10678\\n[  419.947612]\\n[  419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro Not tainted 6.12.0-rc5-00008-gdf56e0f2f3ca #84\\n[  419.949007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\\n[  419.950035] Call Trace:\\n[  419.950384]  <TASK>\\n[  419.950676]  dump_stack_lvl+0x57/0x78\\n[  419.951212]  ? hfsplus_read_wrapper+0x659/0xa0a\\n[  419.951830]  print_report+0x14c/0x49e\\n[  419.952361]  ? __virt_addr_valid+0x267/0x278\\n[  419.952979]  ? kmem_cache_debug_flags+0xc/0x1d\\n[  419.953561]  ? hfsplus_read_wrapper+0x659/0xa0a\\n[  419.954231]  kasan_report+0x89/0xb0\\n[  419.954748]  ? hfsplus_read_wrapper+0x659/0xa0a\\n[  419.955367]  hfsplus_read_wrapper+0x659/0xa0a\\n[  419.955948]  ? __pfx_hfsplus_read_wrapper+0x10/0x10\\n[  419.956618]  ? do_raw_spin_unlock+0x59/0x1a9\\n[  419.957214]  ? _raw_spin_unlock+0x1a/0x2e\\n[  419.957772]  hfsplus_fill_super+0x348/0x1590\\n[  419.958355]  ? hlock_class+0x4c/0x109\\n[  419.958867]  ? __pfx_hfsplus_fill_super+0x10/0x10\\n[  419.959499]  ? __pfx_string+0x10/0x10\\n[  419.960006]  ? lock_acquire+0x3e2/0x454\\n[  419.960532]  ? bdev_name.constprop.0+0xce/0x243\\n[  419.961129]  ? __pfx_bdev_name.constprop.0+0x10/0x10\\n[  419.961799]  ? pointer+0x3f0/0x62f\\n[  419.962277]  ? __pfx_pointer+0x10/0x10\\n[  419.962761]  ? vsnprintf+0x6c4/0xfba\\n[  419.963178]  ? __pfx_vsnprintf+0x10/0x10\\n[  419.963621]  ? setup_bdev_super+0x376/0x3b3\\n[  419.964029]  ? snprintf+0x9d/0xd2\\n[  419.964344]  ? __pfx_snprintf+0x10/0x10\\n[  419.964675]  ? lock_acquired+0x45c/0x5e9\\n[  419.965016]  ? set_blocksize+0x139/0x1c1\\n[  419.965381]  ? sb_set_blocksize+0x6d/0xae\\n[  419.965742]  ? __pfx_hfsplus_fill_super+0x10/0x10\\n[  419.966179]  mount_bdev+0x12f/0x1bf\\n[  419.966512]  ? __pfx_mount_bdev+0x10/0x10\\n[  419.966886]  ? vfs_parse_fs_string+0xce/0x111\\n[  419.967293]  ? __pfx_vfs_parse_fs_string+0x10/0x10\\n[  419.967702]  ? __pfx_hfsplus_mount+0x10/0x10\\n[  419.968073]  legacy_get_tree+0x104/0x178\\n[  419.968414]  vfs_get_tree+0x86/0x296\\n[  419.968751]  path_mount+0xba3/0xd0b\\n[  419.969157]  ? __pfx_path_mount+0x10/0x10\\n[  419.969594]  ? kmem_cache_free+0x1e2/0x260\\n[  419.970311]  do_mount+0x99/0xe0\\n[  419.970630]  ? __pfx_do_mount+0x10/0x10\\n[  419.971008]  __do_sys_mount+0x199/0x1c9\\n[  419.971397]  do_syscall_64+0xd0/0x135\\n[  419.971761]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n[  419.972233] RIP: 0033:0x7c3cb812972e\\n[  419.972564] Code: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01 48\\n[  419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5\\n[  419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e\\n[  419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI:\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: hfsplus: no consultar el tamaño del bloque lógico del dispositivo varias veces Los tamaños de bloque de los dispositivos pueden cambiar. Uno de estos casos es un dispositivo de bucle mediante el uso de ioctl LOOP_SET_BLOCK_SIZE. Si bien esto puede causar otros problemas como el rechazo de IO, en el caso de hfsplus, asignará un bloque utilizando ese tamaño y potencialmente escribirá fuera de los límites cuando hfsplus_read_wrapper llame a hfsplus_submit_bio y la última función lea un io_size diferente. El uso de un nuevo min_io_size establecido inicialmente en sb_min_blocksize funciona para los propósitos de la solución original, ya que se establecerá en el máximo entre HFSPLUS_SECTOR_SIZE y el primer tamaño de bloque lógico visto. Todavía usamos el máximo entre HFSPLUS_SECTOR_SIZE y min_io_size en caso de que este último no esté inicializado. Probado montando un sistema de archivos hfsplus con tamaños de bloque de bucle 512, 1024 y 4096. El informe KASAN producido antes de la corrección se ve así: [ 419.944641] ========================================================================= [ 419.945655] ERROR: KASAN: slab-use-after-free en hfsplus_read_wrapper+0x659/0xa0a [ 419.946703] Lectura de tamaño 2 en la dirección ffff88800721fc00 por la tarea repro/10678 [ 419.947612] [ 419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro No contaminado 6.12.0-rc5-00008-gdf56e0f2f3ca #84 [ 419.949007] Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 [ 419.950035] Seguimiento de llamadas: [ 419.950384]  [ 419.950676] dump_stack_lvl+0x57/0x78 [ 419.951212] ? kmem_cache_debug_flags+0xc/0x1d [ 419.953561] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.954231] kasan_report+0x89/0xb0 [ 419.954748] ? hfsplus_read_wrapper+0x659/0xa0a [ 419.955367] hfsplus_read_wrapper+0x659/0xa0a [ 419.955948] ? __pfx_hfsplus_read_wrapper+0x10/0x10 [ 419.956618] ? do_raw_spin_unlock+0x59/0x1a9 [ 419.957214] ? _raw_spin_unlock+0x1a/0x2e [ 419.957772] hfsplus_fill_super+0x348/0x1590 [ 419.958355] ? hlock_class+0x4c/0x109 [ 419.958867] ? __pfx_hfsplus_fill_super+0x10/0x10 [ 419.959499] ? __pfx_string+0x10/0x10 [ 419.960006] ? lock_acquire+0x3e2/0x454 [ 419.960532] ? bdev_name.constprop.0+0xce/0x243 [ 419.961129] ? __pfx_bdev_name.constprop.0+0x10/0x10 [ 419.961799] ? puntero+0x3f0/0x62f [ 419.962277] ? __pfx_pointer+0x10/0x10 [ 419.962761] ? vsnprintf+0x6c4/0xfba [ 419.963178] ? __pfx_vsnprintf+0x10/0x10 [ 419.963621] ? setup_bdev_super+0x376/0x3b3 [ 419.964029] ? snprintf+0x9d/0xd2 [ 419.964344] ? __pfx_snprintf+0x10/0x10 [ 419.964675] ? lock_acquired+0x45c/0x5e9 [ 419.965016] ? set_blocksize+0x139/0x1c1 [ 419.965381] ? __pfx_hfsplus_fill_super+0x10/0x10 [ 419.966179] mount_bdev+0x12f/0x1bf [ 419.966512] ? __pfx_mount_bdev+0x10/0x10 [ 419.966886] ? vfs_parse_fs_string+0xce/0x111 [ 419.967293] ? __pfx_vfs_parse_fs_string+0x10/0x10 [ 419.967702] ? __pfx_hfsplus_mount+0x10/0x10 [ 419.968073] árbol_obtención_legado+0x104/0x178 [ 419.968414] árbol_obtención_vfs+0x86/0x296 [ 419.968751] montaje_ruta+0xba3/0xd0b [ 419.969157] ? __pfx_path_mount+0x10/0x10 [ 419.969594] ? kmem_cache_free+0x1e2/0x260 [ 419.970311] montaje_ruta+0x99/0xe0 [ 419.970630] ? __pfx_do_mount+0x10/0x10 [ 419.971008] __do_sys_mount+0x199/0x1c9 [ 419.971397] do_syscall_64+0xd0/0x135 [ 419.971761] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 419.972233] RIP: 0033:0x7c3cb812972e [ 419.972564] Código: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 &lt;48&gt; 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01 48 [ 419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e [ 419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI: ---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\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.0.8\",\"versionEndExcluding\":\"4.19.325\",\"matchCriteriaId\":\"D230D81E-7472-4A2F-B9C6-52626B8EC459\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.287\",\"matchCriteriaId\":\"E4B15788-D35E-4E5B-A9C0-070AE3729B34\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.231\",\"matchCriteriaId\":\"B5C644CC-2BD7-4E32-BC54-8DCC7ABE9935\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.174\",\"matchCriteriaId\":\"419FD073-1517-4FD5-8158-F94BC68A1E89\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.120\",\"matchCriteriaId\":\"09AC6122-E2A4-40FE-9D33-268A1B2EC265\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.64\",\"matchCriteriaId\":\"CA16DEE3-ABEC-4449-9F4A-7A3DC4FC36C7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.11.11\",\"matchCriteriaId\":\"21434379-192D-472F-9B54-D45E3650E893\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.12\",\"versionEndExcluding\":\"6.12.2\",\"matchCriteriaId\":\"D8882B1B-2ABC-4838-AC1D-DBDBB5764776\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/06cbfbb13ac88f4154c2eb4bc4176f9d10139847\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1c82587cb57687de3f18ab4b98a8850c789bedcf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/21900e8478126ff6afe3b66679f676e74d1f8830\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2667c9b7b76efcbc7adbfea249892f20c313b0da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3d7bda75e1a6239db053c73acde17ca146317824\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bfeecda050aa9376f642d5b2a71c4112cc6c8216\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f57725bcc5816425e25218fdf5fb6923bc578cdf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
   },
}


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