CVE-2022-49738 (GCVE-0-2022-49738)
Vulnerability from cvelistv5
Published
2025-03-27 16:42
Modified
2025-07-11 17:19
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on i_extra_isize in is_alive() syzbot found a f2fs bug: BUG: KASAN: slab-out-of-bounds in data_blkaddr fs/f2fs/f2fs.h:2891 [inline] BUG: KASAN: slab-out-of-bounds in is_alive fs/f2fs/gc.c:1117 [inline] BUG: KASAN: slab-out-of-bounds in gc_data_segment fs/f2fs/gc.c:1520 [inline] BUG: KASAN: slab-out-of-bounds in do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734 Read of size 4 at addr ffff888076557568 by task kworker/u4:3/52 CPU: 1 PID: 52 Comm: kworker/u4:3 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: writeback wb_workfn (flush-7:0) Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 data_blkaddr fs/f2fs/f2fs.h:2891 [inline] is_alive fs/f2fs/gc.c:1117 [inline] gc_data_segment fs/f2fs/gc.c:1520 [inline] do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734 f2fs_gc+0x88c/0x20a0 fs/f2fs/gc.c:1831 f2fs_balance_fs+0x544/0x6b0 fs/f2fs/segment.c:410 f2fs_write_inode+0x57e/0xe20 fs/f2fs/inode.c:753 write_inode fs/fs-writeback.c:1440 [inline] __writeback_single_inode+0xcfc/0x1440 fs/fs-writeback.c:1652 writeback_sb_inodes+0x54d/0xf90 fs/fs-writeback.c:1870 wb_writeback+0x2c5/0xd70 fs/fs-writeback.c:2044 wb_do_writeback fs/fs-writeback.c:2187 [inline] wb_workfn+0x2dc/0x12f0 fs/fs-writeback.c:2227 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The root cause is that we forgot to do sanity check on .i_extra_isize in below path, result in accessing invalid address later, fix it. - gc_data_segment - is_alive - data_blkaddr - offset_in_addr
References
Impacted products
Vendor Product Version
Linux Linux Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
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{
  "containers": {
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/gc.c"
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          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "version": "3.8"
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              "version": "0",
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              "status": "unaffected",
              "version": "5.15.93",
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              "status": "unaffected",
              "version": "6.1.11",
              "versionType": "semver"
            },
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              "version": "6.2",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on i_extra_isize in is_alive()\n\nsyzbot found a f2fs bug:\n\nBUG: KASAN: slab-out-of-bounds in data_blkaddr fs/f2fs/f2fs.h:2891 [inline]\nBUG: KASAN: slab-out-of-bounds in is_alive fs/f2fs/gc.c:1117 [inline]\nBUG: KASAN: slab-out-of-bounds in gc_data_segment fs/f2fs/gc.c:1520 [inline]\nBUG: KASAN: slab-out-of-bounds in do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734\nRead of size 4 at addr ffff888076557568 by task kworker/u4:3/52\n\nCPU: 1 PID: 52 Comm: kworker/u4:3 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\nWorkqueue: writeback wb_workfn (flush-7:0)\nCall Trace:\n\u003cTASK\u003e\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\nprint_address_description mm/kasan/report.c:284 [inline]\nprint_report+0x15e/0x45d mm/kasan/report.c:395\nkasan_report+0xbb/0x1f0 mm/kasan/report.c:495\ndata_blkaddr fs/f2fs/f2fs.h:2891 [inline]\nis_alive fs/f2fs/gc.c:1117 [inline]\ngc_data_segment fs/f2fs/gc.c:1520 [inline]\ndo_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734\nf2fs_gc+0x88c/0x20a0 fs/f2fs/gc.c:1831\nf2fs_balance_fs+0x544/0x6b0 fs/f2fs/segment.c:410\nf2fs_write_inode+0x57e/0xe20 fs/f2fs/inode.c:753\nwrite_inode fs/fs-writeback.c:1440 [inline]\n__writeback_single_inode+0xcfc/0x1440 fs/fs-writeback.c:1652\nwriteback_sb_inodes+0x54d/0xf90 fs/fs-writeback.c:1870\nwb_writeback+0x2c5/0xd70 fs/fs-writeback.c:2044\nwb_do_writeback fs/fs-writeback.c:2187 [inline]\nwb_workfn+0x2dc/0x12f0 fs/fs-writeback.c:2227\nprocess_one_work+0x9bf/0x1710 kernel/workqueue.c:2289\nworker_thread+0x665/0x1080 kernel/workqueue.c:2436\nkthread+0x2e4/0x3a0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n\nThe root cause is that we forgot to do sanity check on .i_extra_isize\nin below path, result in accessing invalid address later, fix it.\n- gc_data_segment\n - is_alive\n  - data_blkaddr\n   - offset_in_addr"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-11T17:19:21.410Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e5142a4935c1f15841d06047b8130078fc4d7b8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/914e38f02a490dafd980ff0f39cccedc074deb29"
        },
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          "url": "https://git.kernel.org/stable/c/97ccfffcc061e54ce87e4a51a40e2e9cb0b7076a"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b25035fb888cb2f78bf0b9c9f95b1dc54480d36"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3b7b4afd6b2c344eabf9cc26b8bfa903c164c7c"
        }
      ],
      "title": "f2fs: fix to do sanity check on i_extra_isize in is_alive()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49738",
    "datePublished": "2025-03-27T16:42:50.951Z",
    "dateReserved": "2025-03-27T16:39:17.986Z",
    "dateUpdated": "2025-07-11T17:19:21.410Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49738\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-03-27T17:15:38.340\",\"lastModified\":\"2025-04-14T20:38:36.153\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to do sanity check on i_extra_isize in is_alive()\\n\\nsyzbot found a f2fs bug:\\n\\nBUG: KASAN: slab-out-of-bounds in data_blkaddr fs/f2fs/f2fs.h:2891 [inline]\\nBUG: KASAN: slab-out-of-bounds in is_alive fs/f2fs/gc.c:1117 [inline]\\nBUG: KASAN: slab-out-of-bounds in gc_data_segment fs/f2fs/gc.c:1520 [inline]\\nBUG: KASAN: slab-out-of-bounds in do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734\\nRead of size 4 at addr ffff888076557568 by task kworker/u4:3/52\\n\\nCPU: 1 PID: 52 Comm: kworker/u4:3 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\\nWorkqueue: writeback wb_workfn (flush-7:0)\\nCall Trace:\\n\u003cTASK\u003e\\n__dump_stack lib/dump_stack.c:88 [inline]\\ndump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\\nprint_address_description mm/kasan/report.c:284 [inline]\\nprint_report+0x15e/0x45d mm/kasan/report.c:395\\nkasan_report+0xbb/0x1f0 mm/kasan/report.c:495\\ndata_blkaddr fs/f2fs/f2fs.h:2891 [inline]\\nis_alive fs/f2fs/gc.c:1117 [inline]\\ngc_data_segment fs/f2fs/gc.c:1520 [inline]\\ndo_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734\\nf2fs_gc+0x88c/0x20a0 fs/f2fs/gc.c:1831\\nf2fs_balance_fs+0x544/0x6b0 fs/f2fs/segment.c:410\\nf2fs_write_inode+0x57e/0xe20 fs/f2fs/inode.c:753\\nwrite_inode fs/fs-writeback.c:1440 [inline]\\n__writeback_single_inode+0xcfc/0x1440 fs/fs-writeback.c:1652\\nwriteback_sb_inodes+0x54d/0xf90 fs/fs-writeback.c:1870\\nwb_writeback+0x2c5/0xd70 fs/fs-writeback.c:2044\\nwb_do_writeback fs/fs-writeback.c:2187 [inline]\\nwb_workfn+0x2dc/0x12f0 fs/fs-writeback.c:2227\\nprocess_one_work+0x9bf/0x1710 kernel/workqueue.c:2289\\nworker_thread+0x665/0x1080 kernel/workqueue.c:2436\\nkthread+0x2e4/0x3a0 kernel/kthread.c:376\\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\\n\\nThe root cause is that we forgot to do sanity check on .i_extra_isize\\nin below path, result in accessing invalid address later, fix it.\\n- gc_data_segment\\n - is_alive\\n  - data_blkaddr\\n   - offset_in_addr\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: correcci\u00f3n para realizar una comprobaci\u00f3n de cordura en i_extra_isize en is_alive() syzbot encontr\u00f3 un error de f2fs: ERROR: KASAN: slab-out-of-bounds en data_blkaddr fs/f2fs/f2fs.h:2891 [en l\u00ednea] ERROR: KASAN: slab-out-of-bounds en is_alive fs/f2fs/gc.c:1117 [en l\u00ednea] ERROR: KASAN: slab-out-of-bounds en gc_data_segment fs/f2fs/gc.c:1520 [en l\u00ednea] ERROR: KASAN: slab-out-of-bounds en do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff888076557568 por la tarea kworker/u4:3/52 CPU: 1 PID: 52 Comm: kworker/u4:3 No contaminado 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 26/10/2022 Cola de trabajo: escritura diferida wb_workfn (flush-7:0) Rastreo de llamadas: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 data_blkaddr fs/f2fs/f2fs.h:2891 [inline] is_alive fs/f2fs/gc.c:1117 [inline] gc_data_segment fs/f2fs/gc.c:1520 [inline] do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734 f2fs_gc+0x88c/0x20a0 fs/f2fs/gc.c:1831 f2fs_balance_fs+0x544/0x6b0 fs/f2fs/segment.c:410 f2fs_write_inode+0x57e/0xe20 fs/f2fs/inode.c:753 write_inode fs/fs-writeback.c:1440 [inline] __writeback_single_inode+0xcfc/0x1440 fs/fs-writeback.c:1652 writeback_sb_inodes+0x54d/0xf90 fs/fs-writeback.c:1870 wb_writeback+0x2c5/0xd70 fs/fs-writeback.c:2044 wb_do_writeback fs/fs-writeback.c:2187 [inline] wb_workfn+0x2dc/0x12f0 fs/fs-writeback.c:2227 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 La causa ra\u00edz es que olvidamos hacer una comprobaci\u00f3n de cordura en .i_extra_isize en la siguiente ruta, lo que da como resultado el acceso a una direcci\u00f3n no v\u00e1lida m\u00e1s tarde, corr\u00edjalo. - gc_data_segment - is_alive - data_blkaddr - offset_in_addr\"}],\"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:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.4.232\",\"matchCriteriaId\":\"B50AC354-4651-4CDE-8EA9-58A9A917F725\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.168\",\"matchCriteriaId\":\"12258A3F-04BD-49C9-9C6B-D3C1945E8910\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.93\",\"matchCriteriaId\":\"98FAC10E-42A0-4372-B1A0-A49CF672890E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.11\",\"matchCriteriaId\":\"535D03F4-DA02-49FE-934E-668827E6407B\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5b25035fb888cb2f78bf0b9c9f95b1dc54480d36\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/914e38f02a490dafd980ff0f39cccedc074deb29\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/97ccfffcc061e54ce87e4a51a40e2e9cb0b7076a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d3b7b4afd6b2c344eabf9cc26b8bfa903c164c7c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e5142a4935c1f15841d06047b8130078fc4d7b8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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