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xen, pvh: fix unbootable VMs by inlining memset() in xen_prepare_pvh()

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If this memset() is not inlined than PVH early boot code can call
into KASAN-instrumented memset() which results in unbootable VMs.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Juergen Gross <jgross@suse.com>
Message-ID: <20240802154253.482658-3-adobriyan@gmail.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
This commit is contained in:
Alexey Dobriyan 2024-08-02 18:42:53 +03:00 committed by Juergen Gross
parent 416a33c9af
commit fbe5a6dfe4
1 changed files with 5 additions and 1 deletions
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6
arch/x86/platform/pvh/enlighten.c
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@ -130,7 +130,11 @@ void __init xen_prepare_pvh(void)
BUG();
}
memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
/*
* This must not compile to "call memset" because memset() may be
* instrumented.
*/
__builtin_memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
hypervisor_specific_init(xen_guest);