In the Linux kernel, the following vulnerability has been resolved:
mm/page_table_check: fix crash on ZONE_DEVICE
Not all pages may apply to pgtable check. One example is ZONE_DEVICE
pages: they map PFNs directly, and they don’t allocate page_ext at all
even if there’s struct page around. One may reference
devm_memremap_pages().
When both ZONE_DEVICE and page-table-check enabled, then try to map some
dax memories, one can trigger kernel bug constantly now when the kernel
was trying to inject some pfn maps on the dax device:
kernel BUG at mm/page_table_check.c:55!
While it’s pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page
fault resolutions, skip all the checks if page_ext doesn’t even exist in
pgtable checker, which applies to ZONE_DEVICE but maybe more.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws-6.5 | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-azure | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-azure-6.5 | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gcp | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-gcp-6.5 | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-gke | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-ibm | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux-intel | < any | UNKNOWN |
git.kernel.org/linus/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 (6.10-rc5)
git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b
git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0
git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43
git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629
launchpad.net/bugs/cve/CVE-2024-40948
nvd.nist.gov/vuln/detail/CVE-2024-40948
security-tracker.debian.org/tracker/CVE-2024-40948
www.cve.org/CVERecord?id=CVE-2024-40948