{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-38598",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-38598"
  ],
  "published": "2024-06-19T13:46:33Z",
  "summary": "md: fix resync softlockup when bitmap size is less than array size",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: fix resync softlockup when bitmap size is less than array size\n\nIs is reported that for dm-raid10, lvextend + lvchange --syncaction will\ntrigger following softlockup:\n\nkernel:watchdog: BUG: soft lockup - CPU#3 stuck for 26s! [mdX_resync:6976]\nCPU: 7 PID: 3588 Comm: mdX_resync Kdump: loaded Not tainted 6.9.0-rc4-next-20240419 #1\nRIP: 0010:_raw_spin_unlock_irq+0x13/0x30\nCall Trace:\n <TASK>\n md_bitmap_start_sync+0x6b/0xf0\n raid10_sync_request+0x25c/0x1b40 [raid10]\n md_do_sync+0x64b/0x1020\n md_thread+0xa7/0x170\n kthread+0xcf/0x100\n ret_from_fork+0x30/0x50\n ret_from_fork_asm+0x1a/0x30\n\nAnd the detailed process is as follows:\n\nmd_do_sync\n j = mddev->resync_min\n while (j < max_sectors)\n  sectors = raid10_sync_request(mddev, j, &skipped)\n   if (!md_bitmap_start_sync(..., &sync_blocks))\n    // md_bitmap_start_sync set sync_blocks to 0\n    return sync_blocks + sectors_skippe;\n  // sectors = 0;\n  j += sectors;\n  // j never change\n\nRoot cause is that commit 301867b1c168 (\"md/raid10: check\nslab-out-of-bounds in md_bitmap_get_counter\") return early from\nmd_bitmap_get_counter(), without setting returned blocks.\n\nFix this problem by always set returned blocks from\nmd_bitmap_get_counter\"(), as it used to be.\n\nNoted that this patch just fix the softlockup problem in kernel, the\ncase that bitmap size doesn't match array size still need to be fixed.",
  "affected": [
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        "name": "linux"
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        "1:6.6.20-1+rpt1",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-38598"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d4b9c764d48fa41caa24cfb4275f3aa9fb4bd798"
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      "url": "https://git.kernel.org/stable/c/43771597feba89a839c5f893716df88ae5c237ce"
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    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
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}