x86: vdso: move the sysctl to arch/x86/entry/vdso/vdso32-setup.c

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When CONFIG_X86_32 is defined and CONFIG_UML is not defined,
vdso_enabled belongs to arch/x86/entry/vdso/vdso32-setup.c.
So, move it into its own file.

Before this patch, vdso_enabled was allowed to be set to
a value exceeding 1 on x86_32 architecture. After this patch is
applied, vdso_enabled is not permitted to set the value more than 1.
It does not matter, because according to the function load_vdso32(),
only vdso_enabled is set to 1, VDSO would be enabled. Other values
all mean "disabled". The same limitation could be seen in the
function vdso32_setup().

Signed-off-by: Kaixiong Yu <yukaixiong@huawei.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Signed-off-by: Joel Granados <joel.granados@kernel.org>

...

This commit is contained in:

Kaixiong Yu 2025-01-11 15:07:48 +08:00 • committed by Joel Granados

parent 52e66823e0

commit a33e288147

2 changed files with 12 additions and 12 deletions

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16

arch/x86/entry/vdso/vdso32-setup.c

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8

kernel/sysctl.c

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