LoongArch: Fix panic caused by NULL-PMD in huge_pte_offset() (CVE-2025-38195)

Summary

LoongArch: Fix panic caused by NULL-PMD in huge_pte_offset()

Original description

The description as published by the source.

In the Linux kernel, the following vulnerability has been resolved:

LoongArch: Fix panic caused by NULL-PMD in huge_pte_offset()

ERROR INFO:

CPU 25 Unable to handle kernel paging request at virtual address 0x0
...
Call Trace:
[<900000000023c30c>] huge_pte_offset+0x3c/0x58
[<900000000057fd4c>] hugetlb_follow_page_mask+0x74/0x438
[<900000000051fee8>] __get_user_pages+0xe0/0x4c8
[<9000000000522414>] faultin_page_range+0x84/0x380
[<9000000000564e8c>] madvise_vma_behavior+0x534/0xa48
[<900000000056689c>] do_madvise+0x1bc/0x3e8
[<9000000000566df4>] sys_madvise+0x24/0x38
[<90000000015b9e88>] do_syscall+0x78/0x98
[<9000000000221f18>] handle_syscall+0xb8/0x158

In some cases, pmd may be NULL and rely on NULL as the return value for
processing, so it is necessary to determine this situation here.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Affected packages

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.95"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.35"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.15.4"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

BellSoft Alpaquita BELL-CVE-2025-38195 linux-lts
Debian DEBIAN-CVE-2025-38195 linux

Summary

Original description

Affected packages

Fix status by distribution

References