cve-2024-26710
Vulnerability from cvelistv5
Published
2024-04-03 14:55
Modified
2025-01-24 16:01
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736
Impacted products
Vendor Product Version
Linux Linux Version: 18f14afe281648e31ed35c9ad2fcb724c4838ad9
Version: b38014874530d3776de75679315e8c1fe04aa89b
Version: 58f396513cb1fa4ef91838c78698d458100cc27c
Version: 18f14afe281648e31ed35c9ad2fcb724c4838ad9
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   Linux Linux Version: 6.8
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