ghsa-mq9q-ghqw-348q
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
powerpc/iommu: Fix the missing iommu_group_put() during platform domain attach
The function spapr_tce_platform_iommu_attach_dev() is missing to call iommu_group_put() when the domain is already set. This refcount leak shows up with BUG_ON() during DLPAR remove operation as:
KernelBug: Kernel bug in state 'None': kernel BUG at arch/powerpc/platforms/pseries/iommu.c:100!
Oops: Exception in kernel mode, sig: 5 [#1]
LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=8192 NUMA pSeries
The patch adds the missing iommu_group_put() call.
{
"affected": [],
"aliases": [
"CVE-2024-26709"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-03T15:15:53Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/iommu: Fix the missing iommu_group_put() during platform domain attach\n\nThe function spapr_tce_platform_iommu_attach_dev() is missing to call\niommu_group_put() when the domain is already set. This refcount leak\nshows up with BUG_ON() during DLPAR remove operation as:\n\n KernelBug: Kernel bug in state \u0027None\u0027: kernel BUG at arch/powerpc/platforms/pseries/iommu.c:100!\n Oops: Exception in kernel mode, sig: 5 [#1]\n LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=8192 NUMA pSeries\n \u003csnip\u003e\n Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NH1060_016) hv:phyp pSeries\n NIP: c0000000000ff4d4 LR: c0000000000ff4cc CTR: 0000000000000000\n REGS: c0000013aed5f840 TRAP: 0700 Tainted: G I (6.8.0-rc3-autotest-g99bd3cb0d12e)\n MSR: 8000000000029033 \u003cSF,EE,ME,IR,DR,RI,LE\u003e CR: 44002402 XER: 20040000\n CFAR: c000000000a0d170 IRQMASK: 0\n ...\n NIP iommu_reconfig_notifier+0x94/0x200\n LR iommu_reconfig_notifier+0x8c/0x200\n Call Trace:\n iommu_reconfig_notifier+0x8c/0x200 (unreliable)\n notifier_call_chain+0xb8/0x19c\n blocking_notifier_call_chain+0x64/0x98\n of_reconfig_notify+0x44/0xdc\n of_detach_node+0x78/0xb0\n ofdt_write.part.0+0x86c/0xbb8\n proc_reg_write+0xf4/0x150\n vfs_write+0xf8/0x488\n ksys_write+0x84/0x140\n system_call_exception+0x138/0x330\n system_call_vectored_common+0x15c/0x2ec\n\nThe patch adds the missing iommu_group_put() call.",
"id": "GHSA-mq9q-ghqw-348q",
"modified": "2024-04-03T15:30:43Z",
"published": "2024-04-03T15:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26709"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0846dd77c8349ec92ca0079c9c71d130f34cb192"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c90fdea9cac9eb419fc266e75d625cb60c8f7f6c"
}
],
"schema_version": "1.4.0",
"severity": []
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.