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      <title>CVE-2026-46141 — powerpc/xive: fix kmemleak caused by incorrect chip_data lookup</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-46141</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;powerpc/xive: fix kmemleak caused by incorrect chip_data lookup&lt;/p&gt;
&lt;p&gt;The kmemleak reports the following memory leak:&lt;/p&gt;
&lt;p&gt;Unreferenced object 0xc0000002a7fbc640 (size 64):
  comm &amp;#34;kworker/8:1&amp;#34;, pid 540, jiffies 4294937872
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 09 04 00 04 00 00  ................
    00 00 a7 81 00 00 0a c0 00 00 08 04 00 04 00 00  ................
  backtrace (crc 177d48f6):
    __kmalloc_cache_noprof+0x520/0x730
    xive_irq_alloc_data.constprop.0+0x40/0xe0
    xive_irq_domain_alloc+0xd0/0x1b0
    irq_domain_alloc_irqs_parent+0x44/0x6c
    pseries_irq_domain_alloc+0x1cc/0x354
    irq_domain_alloc_irqs_parent+0x44/0x6c
    msi_domain_alloc+0xb0/0x220
    irq_domain_alloc_irqs_locked+0x138/0x4d0
    __irq_domain_alloc_irqs+0x8c/0xfc
    __msi_domain_alloc_irqs+0x214/0x4d8
    msi_domain_alloc_irqs_all_locked+0x70/0xf8
    pci_msi_setup_msi_irqs+0x60/0x78
    __pci_enable_msix_range+0x54c/0x98c
    pci_alloc_irq_vectors_affinity+0x16c/0x1d4
    nvme_pci_enable+0xac/0x9c0 [nvme]
    nvme_probe+0x340/0x764 [nvme]&lt;/p&gt;
&lt;p&gt;This occurs when allocating MSI-X vectors for an NVMe device. During
allocation the XIVE code creates a struct xive_irq_data and stores it
in irq_data-&amp;gt;chip_data.&lt;/p&gt;
&lt;p&gt;When the MSI-X irqdomain is later freed, xive_irq_free_data() is
responsible for retrieving this structure and freeing it. However,
after commit cc0cc23babc9 (&amp;#34;powerpc/xive: Untangle xive from child
interrup…&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;powerpc/xive: fix kmemleak caused by incorrect chip_data lookup&lt;/p&gt;
&lt;p&gt;The kmemleak reports the following memory leak:&lt;/p&gt;
&lt;p&gt;Unreferenced object 0xc0000002a7fbc640 (size 64):
  comm &amp;#34;kworker/8:1&amp;#34;, pid 540, jiffies 4294937872
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 09 04 00 04 00 00  ................
    00 00 a7 81 00 00 0a c0 00 00 08 04 00 04 00 00  ................
  backtrace (crc 177d48f6):
    __kmalloc_cache_noprof+0x520/0x730
    xive_irq_alloc_data.constprop.0+0x40/0xe0
    xive_irq_domain_alloc+0xd0/0x1b0
    irq_domain_alloc_irqs_parent+0x44/0x6c
    pseries_irq_domain_alloc+0x1cc/0x354
    irq_domain_alloc_irqs_parent+0x44/0x6c
    msi_domain_alloc+0xb0/0x220
    irq_domain_alloc_irqs_locked+0x138/0x4d0
    __irq_domain_alloc_irqs+0x8c/0xfc
    __msi_domain_alloc_irqs+0x214/0x4d8
    msi_domain_alloc_irqs_all_locked+0x70/0xf8
    pci_msi_setup_msi_irqs+0x60/0x78
    __pci_enable_msix_range+0x54c/0x98c
    pci_alloc_irq_vectors_affinity+0x16c/0x1d4
    nvme_pci_enable+0xac/0x9c0 [nvme]
    nvme_probe+0x340/0x764 [nvme]&lt;/p&gt;
&lt;p&gt;This occurs when allocating MSI-X vectors for an NVMe device. During
allocation the XIVE code creates a struct xive_irq_data and stores it
in irq_data-&amp;gt;chip_data.&lt;/p&gt;
&lt;p&gt;When the MSI-X irqdomain is later freed, xive_irq_free_data() is
responsible for retrieving this structure and freeing it. However,
after commit cc0cc23babc9 (&amp;#34;powerpc/xive: Untangle xive from child
interrup…&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2026-46141</guid>
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