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Change History

kernel.org https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736 [No types assigned]

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 cause

kernel.org https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9 [No types assigned]

kernel.org https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb [No types assigned]

kernel.org https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe [No types assigned]