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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-26710

powerpc/kasan: Limit KASAN thread size increase to 32KB

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/kasan: Limit KASAN thread size increase to 32KB KASAN is seen to increase stack usage, to the point that it was reported to lead to stack overflow on some 32-bit machines (see link). To avoid overflows the stack size was doubled for KASAN builds in commit 3e8635fb2e07 ("powerpc/kasan: Force thread size increase with KASAN"). However with a 32KB stack size to begin with, the doubling leads to a 64KB stack, which causes build errors: arch/powerpc/kernel/switch.S:249: Error: operand out of range (0x000000000000fe50 is not between 0xffffffffffff8000 and 0x0000000000007fff) Although the asm could be reworked, in practice a 32KB stack seems sufficient even for KASAN builds - the additional usage seems to be in the 2-3KB range for a 64-bit KASAN build. So only increase the stack for KASAN if the stack size is < 32KB.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 9ccf64e763aca088b0d25c1274af42b1a6a45135 to < f9a4c401bf4c5af3437ad221c0a5880a518068d4affected
  • b38014874530d3776de75679315e8c1fe04aa89b to < 4cc31fa07445879a13750cb061bb8c2654975fcbaffected
  • 58f396513cb1fa4ef91838c78698d458100cc27c to < b29b16bd836a838b7690f80e37f8376414c74cbeaffected
  • 18f14afe281648e31ed35c9ad2fcb724c4838ad9 to < f1acb109505d983779bbb7e20a1ee6244d2b5736affected

Linux Linux

Default version status: unaffected

  • 6.1.75 to < 6.1.76affected
  • 6.6.14 to < 6.6.18affected
  • 6.7.2 to < 6.7.6affected

References