mm: hugetlb: independent PMD page table shared count
In the Linux kernel, the following vulnerability has been resolved: mm: hugetlb: independent PMD page table shared count The folio refcount may be increased unexpectly through try_get_folio() by caller such as split_huge_pages. In huge_pmd_unshare(), we use refcount to check whether a pmd page table is shared. The check is incorrect if the refcount is increased by the above caller, and this can cause the page table leaked: BUG: Bad page state in process sh pfn:109324 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x66 pfn:0x109324 flags: 0x17ffff800000000(node=0|zone=2|lastcpupid=0xfffff) page_type: f2(table) raw: 017ffff800000000 0000000000000000 0000000000000000 0000000000000000 raw: 0000000000000066 0000000000000000 00000000f2000000 0000000000000000 page dumped because: nonzero mapcount ... CPU: 31 UID: 0 PID: 7515 Comm: sh Kdump: loaded Tainted: G B 6.13.0-rc2master+ #7 Tainted: [B]=BAD_PAGE Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 Call trace: show_stack+0x20/0x38 (C) dump_stack_lvl+0x80/0xf8 dump_stack+0x18/0x28 bad_page+0x8c/0x130 free_page_is_bad_report+0xa4/0xb0 free_unref_page+0x3cc/0x620 __folio_put+0xf4/0x158 split_huge_pages_all+0x1e0/0x3e8 split_huge_pages_write+0x25c/0x2d8 full_proxy_write+0x64/0xd8 vfs_write+0xcc/0x280 ksys_write+0x70/0x110 __arm64_sys_write+0x24/0x38 invoke_syscall+0x50/0x120 el0_svc_common.constprop.0+0xc8/0xf0 do_el0_svc+0x24/0x38 el0_svc+0x34/0x128 el0t_64_sync_handler+0xc8/0xd0 el0t_64_sync+0x190/0x198 The
CVE-2024-57883
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-57883
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa",
"lessThan": "94b4b41d0cdf5cfd4d4325bc0e6e9e0d0e996133",
"versionType": "git"
},
{
"status": "affected",
"version": "39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa",
"lessThan": "8410996eb6fea116fe1483ed977aacf580eee7b4",
"versionType": "git"
},
{
"status": "affected",
"version": "39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa",
"lessThan": "02333ac1c35370517a19a4a131332a9690c6a5c7",
"versionType": "git"
},
{
"status": "affected",
"version": "39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa",
"lessThan": "56b274473d6e7e7375f2d0a2b4aca11d67c6b52f",
"versionType": "git"
},
{
"status": "affected",
"version": "39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa",
"lessThan": "2e31443a0d18ae43b9d29e02bf0563f07772193d",
"versionType": "git"
},
{
"status": "affected",
"version": "39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa",
"lessThan": "59d9094df3d79443937add8700b2ef1a866b1081",
"versionType": "git"
}
],
"programFiles": [
"include/linux/mm.h",
"include/linux/mm_types.h",
"mm/hugetlb.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.20"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.20",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.239",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.186",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.142",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.72",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.9",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/mm.h",
"include/linux/mm_types.h",
"mm/hugetlb.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-57883
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30409 · Revision 1
- Added to Heist Feed
- Publisher date