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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2024-08-02 18:42:53 +0300 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2024-09-12 08:25:12 +0200 |
| commit | fbe5a6dfe492eff8b0adef85fcabd84e246f1102 (patch) | |
| tree | 8ca85ea83b83497f12ba240d4d308c523b66779b /arch/x86/platform | |
| parent | 416a33c9afcef24d8b48e414d08d4ae4472aa669 (diff) | |
| download | linux-fbe5a6dfe492eff8b0adef85fcabd84e246f1102.tar.gz linux-fbe5a6dfe492eff8b0adef85fcabd84e246f1102.tar.bz2 linux-fbe5a6dfe492eff8b0adef85fcabd84e246f1102.zip | |
xen, pvh: fix unbootable VMs by inlining memset() in xen_prepare_pvh()
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>
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/pvh/enlighten.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/platform/pvh/enlighten.c b/arch/x86/platform/pvh/enlighten.c index 944e0290f2c0..2263885d16ba 100644 --- a/arch/x86/platform/pvh/enlighten.c +++ b/arch/x86/platform/pvh/enlighten.c @@ -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); |