CVE Details
Basic Information
| Title | mm/debug_vm_pgtable: fix BUG_ON with pud advanced test |
|---|---|
| Type | cve |
| Published | 2024-04-17T10:14:20.812Z |
| Modified | 2025-05-04T08:57:55.763Z |
Product Information
| Vendor | Linux |
|---|---|
| Product | Linux |
| Version | 27af67f35631ac4b61b5e4455b44c9aee8d2cc4b |
CVSS Information
| Base Score | 0.0 () |
|---|
Affected Products
- Linux Linux 27af67f35631ac4b61b5e4455b44c9aee8d2cc4b
- Linux Linux 27af67f35631ac4b61b5e4455b44c9aee8d2cc4b
- Linux Linux 27af67f35631ac4b61b5e4455b44c9aee8d2cc4b
- Linux Linux 6.6
Additional Information
| Source | Linux |
|---|
Description
mm/debug_vm_pgtable: fix BUG_ON with pud advanced test
Architectures like powerpc add debug checks to ensure we find only devmap
PUD pte entries. These debug checks are only done with CONFIG_DEBUG_VM.
This patch marks the ptes used for PUD advanced test devmap pte entries so
that we don’t hit on debug checks on architecture like ppc64 as below.
WARNING: CPU: 2 PID: 1 at arch/powerpc/mm/book3s64/radix_pgtable.c:1382 radix__pud_hugepage_update+0x38/0x138
….
NIP [c0000000000a7004] radix__pud_hugepage_update+0x38/0x138
LR [c0000000000a77a8] radix__pudp_huge_get_and_clear+0x28/0x60
Call Trace:
[c000000004a2f950] [c000000004a2f9a0] 0xc000000004a2f9a0 (unreliable)
[c000000004a2f980] [000d34c100000000] 0xd34c100000000
[c000000004a2f9a0] [c00000000206ba98] pud_advanced_tests+0x118/0x334
[c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48
[c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388
Also
kernel BUG at arch/powerpc/mm/book3s64/pgtable.c:202!
….
NIP [c000000000096510] pudp_huge_get_and_clear_full+0x98/0x174
LR [c00000000206bb34] pud_advanced_tests+0x1b4/0x334
Call Trace:
[c000000004a2f950] [000d34c100000000] 0xd34c100000000 (unreliable)
[c000000004a2f9a0] [c00000000206bb34] pud_advanced_tests+0x1b4/0x334
[c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48
[c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388