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[PATCH] smbios: sanitize type from external type before checking have_fi
From: |
Paolo Bonzini |
Subject: |
[PATCH] smbios: sanitize type from external type before checking have_fields_bitmap |
Date: |
Mon, 5 Sep 2022 12:36:06 +0200 |
test_bit uses header->type as an offset; if the file incorrectly specifies a
type greater than 127, smbios_entry_add will read garbage.
To fix this, just pass the smbios data through, assuming the user knows what
to do. Reported by Coverity as CID 1487255.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
hw/smbios/smbios.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c
index 60349ee402..485fa15202 100644
--- a/hw/smbios/smbios.c
+++ b/hw/smbios/smbios.c
@@ -1205,7 +1205,8 @@ void smbios_entry_add(QemuOpts *opts, Error **errp)
return;
}
- if (test_bit(header->type, have_fields_bitmap)) {
+ if (header->type <= SMBIOS_MAX_TYPE &&
+ test_bit(header->type, have_fields_bitmap)) {
error_setg(errp,
"can't load type %d struct, fields already specified!",
header->type);
--
2.37.2
- [PATCH] smbios: sanitize type from external type before checking have_fields_bitmap,
Paolo Bonzini <=