CVE-2024-26850 (GCVE-0-2024-26850)
Vulnerability from cvelistv5
Published
2024-04-17 10:14
Modified
2025-05-04 08:57
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: 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
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/720da1e593b85a550593b415bf1d79a053133451
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2a9510c0e39d06f5544075c13040407bdbf2803
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eeeddf85fc58d48c58ad916e4ca12363ebd8ab21
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/720da1e593b85a550593b415bf1d79a053133451
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d2a9510c0e39d06f5544075c13040407bdbf2803
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/eeeddf85fc58d48c58ad916e4ca12363ebd8ab21
Impacted products
Vendor Product Version
Linux Linux Version: 27af67f35631ac4b61b5e4455b44c9aee8d2cc4b
Version: 27af67f35631ac4b61b5e4455b44c9aee8d2cc4b
Version: 27af67f35631ac4b61b5e4455b44c9aee8d2cc4b
 Create a notification for this product.
   Linux Linux Version: 6.6
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