CVE-2022-49414 (GCVE-0-2022-49414)
Vulnerability from cvelistv5
Published
2025-02-26 02:12
Modified
2026-05-11 18:59
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix race condition between ext4_write and ext4_convert_inline_data Hulk Robot reported a BUG_ON: ================================================================== EXT4-fs error (device loop3): ext4_mb_generate_buddy:805: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free clusters kernel BUG at fs/ext4/ext4_jbd2.c:53! invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 PID: 25371 Comm: syz-executor.3 Not tainted 5.10.0+ #1 RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline] RIP: 0010:__ext4_journal_stop+0x10e/0x110 fs/ext4/ext4_jbd2.c:116 [...] Call Trace: ext4_write_inline_data_end+0x59a/0x730 fs/ext4/inline.c:795 generic_perform_write+0x279/0x3c0 mm/filemap.c:3344 ext4_buffered_write_iter+0x2e3/0x3d0 fs/ext4/file.c:270 ext4_file_write_iter+0x30a/0x11c0 fs/ext4/file.c:520 do_iter_readv_writev+0x339/0x3c0 fs/read_write.c:732 do_iter_write+0x107/0x430 fs/read_write.c:861 vfs_writev fs/read_write.c:934 [inline] do_pwritev+0x1e5/0x380 fs/read_write.c:1031 [...] ================================================================== Above issue may happen as follows: cpu1 cpu2 __________________________|__________________________ do_pwritev vfs_writev do_iter_write ext4_file_write_iter ext4_buffered_write_iter generic_perform_write ext4_da_write_begin vfs_fallocate ext4_fallocate ext4_convert_inline_data ext4_convert_inline_data_nolock ext4_destroy_inline_data_nolock clear EXT4_STATE_MAY_INLINE_DATA ext4_map_blocks ext4_ext_map_blocks ext4_mb_new_blocks ext4_mb_regular_allocator ext4_mb_good_group_nolock ext4_mb_init_group ext4_mb_init_cache ext4_mb_generate_buddy --> error ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA) ext4_restore_inline_data set EXT4_STATE_MAY_INLINE_DATA ext4_block_write_begin ext4_da_write_end ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA) ext4_write_inline_data_end handle=NULL ext4_journal_stop(handle) __ext4_journal_stop ext4_put_nojournal(handle) ref_cnt = (unsigned long)handle BUG_ON(ref_cnt == 0) ---> BUG_ON The lock held by ext4_convert_inline_data is xattr_sem, but the lock held by generic_perform_write is i_rwsem. Therefore, the two locks can be concurrent. To solve above issue, we add inode_lock() for ext4_convert_inline_data(). At the same time, move ext4_convert_inline_data() in front of ext4_punch_hole(), remove similar handling from ext4_punch_hole().
References
Impacted products
Vendor Product Version
Linux Linux Version: 0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf
Version: 0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf
Version: 0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf
Version: 0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf
Version: 0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf
Version: 0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix race condition between ext4_write and ext4_convert_inline_data\n\nHulk Robot reported a BUG_ON:\n ==================================================================\n EXT4-fs error (device loop3): ext4_mb_generate_buddy:805: group 0,\n block bitmap and bg descriptor inconsistent: 25 vs 31513 free clusters\n kernel BUG at fs/ext4/ext4_jbd2.c:53!\n invalid opcode: 0000 [#1] SMP KASAN PTI\n CPU: 0 PID: 25371 Comm: syz-executor.3 Not tainted 5.10.0+ #1\n RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]\n RIP: 0010:__ext4_journal_stop+0x10e/0x110 fs/ext4/ext4_jbd2.c:116\n [...]\n Call Trace:\n  ext4_write_inline_data_end+0x59a/0x730 fs/ext4/inline.c:795\n  generic_perform_write+0x279/0x3c0 mm/filemap.c:3344\n  ext4_buffered_write_iter+0x2e3/0x3d0 fs/ext4/file.c:270\n  ext4_file_write_iter+0x30a/0x11c0 fs/ext4/file.c:520\n  do_iter_readv_writev+0x339/0x3c0 fs/read_write.c:732\n  do_iter_write+0x107/0x430 fs/read_write.c:861\n  vfs_writev fs/read_write.c:934 [inline]\n  do_pwritev+0x1e5/0x380 fs/read_write.c:1031\n [...]\n ==================================================================\n\nAbove issue may happen as follows:\n           cpu1                     cpu2\n__________________________|__________________________\ndo_pwritev\n vfs_writev\n  do_iter_write\n   ext4_file_write_iter\n    ext4_buffered_write_iter\n     generic_perform_write\n      ext4_da_write_begin\n                           vfs_fallocate\n                            ext4_fallocate\n                             ext4_convert_inline_data\n                              ext4_convert_inline_data_nolock\n                               ext4_destroy_inline_data_nolock\n                                clear EXT4_STATE_MAY_INLINE_DATA\n                               ext4_map_blocks\n                                ext4_ext_map_blocks\n                                 ext4_mb_new_blocks\n                                  ext4_mb_regular_allocator\n                                   ext4_mb_good_group_nolock\n                                    ext4_mb_init_group\n                                     ext4_mb_init_cache\n                                      ext4_mb_generate_buddy  --\u003e error\n       ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)\n                                ext4_restore_inline_data\n                                 set EXT4_STATE_MAY_INLINE_DATA\n       ext4_block_write_begin\n      ext4_da_write_end\n       ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)\n       ext4_write_inline_data_end\n        handle=NULL\n        ext4_journal_stop(handle)\n         __ext4_journal_stop\n          ext4_put_nojournal(handle)\n           ref_cnt = (unsigned long)handle\n           BUG_ON(ref_cnt == 0)  ---\u003e BUG_ON\n\nThe lock held by ext4_convert_inline_data is xattr_sem, but the lock\nheld by generic_perform_write is i_rwsem. Therefore, the two locks can\nbe concurrent.\n\nTo solve above issue, we add inode_lock() for ext4_convert_inline_data().\nAt the same time, move ext4_convert_inline_data() in front of\next4_punch_hole(), remove similar handling from ext4_punch_hole()."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49414",
    "datePublished": "2025-02-26T02:12:35.083Z",
    "dateReserved": "2025-02-26T02:08:31.568Z",
    "dateUpdated": "2026-05-11T18:59:21.432Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
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\"0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf\", \"lessThan\": \"725e00cb7039eae291890f1bb19bc867176745f6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf\", \"lessThan\": \"ccc6639f831bee91aa8b41c8a1cdd020ecfb9f32\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c8d414f163f5d35e43a4de7a6e5ee8c253fcccf\", \"lessThan\": \"f87c7a4b084afc13190cbb263538e444cb2b392a\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/ext4/extents.c\", \"fs/ext4/inode.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.207\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, 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\"https://git.kernel.org/stable/c/725e00cb7039eae291890f1bb19bc867176745f6\"}, {\"url\": \"https://git.kernel.org/stable/c/ccc6639f831bee91aa8b41c8a1cdd020ecfb9f32\"}, {\"url\": \"https://git.kernel.org/stable/c/f87c7a4b084afc13190cbb263538e444cb2b392a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: fix race condition between ext4_write and ext4_convert_inline_data\\n\\nHulk Robot reported a BUG_ON:\\n ==================================================================\\n EXT4-fs error (device loop3): ext4_mb_generate_buddy:805: group 0,\\n block bitmap and bg descriptor inconsistent: 25 vs 31513 free clusters\\n kernel BUG at fs/ext4/ext4_jbd2.c:53!\\n invalid opcode: 0000 [#1] SMP KASAN PTI\\n CPU: 0 PID: 25371 Comm: syz-executor.3 Not tainted 5.10.0+ #1\\n RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]\\n RIP: 0010:__ext4_journal_stop+0x10e/0x110 fs/ext4/ext4_jbd2.c:116\\n [...]\\n Call Trace:\\n  ext4_write_inline_data_end+0x59a/0x730 fs/ext4/inline.c:795\\n  generic_perform_write+0x279/0x3c0 mm/filemap.c:3344\\n  ext4_buffered_write_iter+0x2e3/0x3d0 fs/ext4/file.c:270\\n  ext4_file_write_iter+0x30a/0x11c0 fs/ext4/file.c:520\\n  do_iter_readv_writev+0x339/0x3c0 fs/read_write.c:732\\n  do_iter_write+0x107/0x430 fs/read_write.c:861\\n  vfs_writev fs/read_write.c:934 [inline]\\n  do_pwritev+0x1e5/0x380 fs/read_write.c:1031\\n [...]\\n ==================================================================\\n\\nAbove issue may happen as follows:\\n           cpu1                     cpu2\\n__________________________|__________________________\\ndo_pwritev\\n vfs_writev\\n  do_iter_write\\n   ext4_file_write_iter\\n    ext4_buffered_write_iter\\n     generic_perform_write\\n      ext4_da_write_begin\\n                           vfs_fallocate\\n                            ext4_fallocate\\n                             ext4_convert_inline_data\\n                              ext4_convert_inline_data_nolock\\n                               ext4_destroy_inline_data_nolock\\n                                clear EXT4_STATE_MAY_INLINE_DATA\\n                               ext4_map_blocks\\n                                ext4_ext_map_blocks\\n                                 ext4_mb_new_blocks\\n                                  ext4_mb_regular_allocator\\n                                   ext4_mb_good_group_nolock\\n                                    ext4_mb_init_group\\n                                     ext4_mb_init_cache\\n                                      ext4_mb_generate_buddy  --\u003e error\\n       ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)\\n                                ext4_restore_inline_data\\n                                 set EXT4_STATE_MAY_INLINE_DATA\\n       ext4_block_write_begin\\n      ext4_da_write_end\\n       ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)\\n       ext4_write_inline_data_end\\n        handle=NULL\\n        ext4_journal_stop(handle)\\n         __ext4_journal_stop\\n          ext4_put_nojournal(handle)\\n           ref_cnt = (unsigned long)handle\\n           BUG_ON(ref_cnt == 0)  ---\u003e BUG_ON\\n\\nThe lock held by ext4_convert_inline_data is xattr_sem, but the lock\\nheld by generic_perform_write is i_rwsem. Therefore, the two locks can\\nbe concurrent.\\n\\nTo solve above issue, we add inode_lock() for ext4_convert_inline_data().\\nAt the same time, move ext4_convert_inline_data() in front of\\next4_punch_hole(), remove similar handling from ext4_punch_hole().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.207\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.132\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.46\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.14\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.3\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"3.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T18:59:21.432Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49414\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T18:59:21.432Z\", \"dateReserved\": \"2025-02-26T02:08:31.568Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:12:35.083Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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