KEYS: Use the symbol value for list size, updated by scripts/insert-sys-cert
When a certificate is inserted to the image using scripts/writekey, the
value of __cert_list_end does not change. The updated size can be found
out by reading the value pointed by the system_certificate_list_size
symbol.
Signed-off-by: Mehmet Kayaalp <mkayaalp@linux.vnet.ibm.com>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/scripts/extract-sys-certs.pl b/scripts/extract-sys-certs.pl
index d476e7d..8227ca1 100755
--- a/scripts/extract-sys-certs.pl
+++ b/scripts/extract-sys-certs.pl
@@ -91,13 +91,15 @@
die "Can't find system certificate list"
unless (exists($symbols{"__cert_list_start"}) &&
- exists($symbols{"__cert_list_end"}));
+ exists($symbols{"system_certificate_list_size"}));
my $start = Math::BigInt->new($symbols{"__cert_list_start"});
-my $end = Math::BigInt->new($symbols{"__cert_list_end"});
-my $size = $end - $start;
+my $end;
+my $size;
+my $size_sym = Math::BigInt->new($symbols{"system_certificate_list_size"});
-printf "Have %u bytes of certs at VMA 0x%x\n", $size, $start;
+open FD, "<$vmlinux" || die $vmlinux;
+binmode(FD);
my $s = undef;
foreach my $sec (@sections) {
@@ -110,11 +112,24 @@
next unless ($start >= $s_vma);
next if ($start >= $s_vend);
- die "Cert object partially overflows section $s_name\n"
- if ($end > $s_vend);
+ die "Certificate list size was not found on the same section\n"
+ if ($size_sym < $s_vma || $size_sym > $s_vend);
die "Cert object in multiple sections: ", $s_name, " and ", $s->{name}, "\n"
if ($s);
+
+ my $size_off = $size_sym -$s_vma + $s_foff;
+ my $packed;
+ die $vmlinux if (!defined(sysseek(FD, $size_off, SEEK_SET)));
+ sysread(FD, $packed, 8);
+ $size = unpack 'L!', $packed;
+ $end = $start + $size;
+
+ printf "Have %u bytes of certs at VMA 0x%x\n", $size, $start;
+
+ die "Cert object partially overflows section $s_name\n"
+ if ($end > $s_vend);
+
$s = $sec;
}
@@ -127,8 +142,6 @@
printf "Certificate list at file offset 0x%x\n", $foff;
-open FD, "<$vmlinux" || die $vmlinux;
-binmode(FD);
die $vmlinux if (!defined(sysseek(FD, $foff, SEEK_SET)));
my $buf = "";
my $len = sysread(FD, $buf, $size);