+
+# check for DEVICE_ATTR uses that could be DEVICE_ATTR_<FOO>
+# and whether or not function naming is typical and if
+# DEVICE_ATTR permissions uses are unusual too
+ if ($^V && $^V ge 5.10.0 &&
+ defined $stat &&
+ $stat =~ /\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?\s*(\s*(?:${multi_mode_perms_string_search}|0[0-7]{3,3})\s*)\s*\)?\s*,\s*(\w+)\s*,\s*(\w+)\s*\)/) {
+ my $var = $1;
+ my $perms = $2;
+ my $show = $3;
+ my $store = $4;
+ my $octal_perms = perms_to_octal($perms);
+ if ($show =~ /^${var}_show$/ &&
+ $store =~ /^${var}_store$/ &&
+ $octal_perms eq "0644") {
+ if (WARN("DEVICE_ATTR_RW",
+ "Use DEVICE_ATTR_RW\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*$store\s*\)/DEVICE_ATTR_RW(${var})/;
+ }
+ } elsif ($show =~ /^${var}_show$/ &&
+ $store =~ /^NULL$/ &&
+ $octal_perms eq "0444") {
+ if (WARN("DEVICE_ATTR_RO",
+ "Use DEVICE_ATTR_RO\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/;
+ }
+ } elsif ($show =~ /^NULL$/ &&
+ $store =~ /^${var}_store$/ &&
+ $octal_perms eq "0200") {
+ if (WARN("DEVICE_ATTR_WO",
+ "Use DEVICE_ATTR_WO\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*NULL\s*,\s*$store\s*\)/DEVICE_ATTR_WO(${var})/;
+ }
+ } elsif ($octal_perms eq "0644" ||
+ $octal_perms eq "0444" ||
+ $octal_perms eq "0200") {
+ my $newshow = "$show";
+ $newshow = "${var}_show" if ($show ne "NULL" && $show ne "${var}_show");
+ my $newstore = $store;
+ $newstore = "${var}_store" if ($store ne "NULL" && $store ne "${var}_store");
+ my $rename = "";
+ if ($show ne $newshow) {
+ $rename .= " '$show' to '$newshow'";
+ }
+ if ($store ne $newstore) {
+ $rename .= " '$store' to '$newstore'";
+ }
+ WARN("DEVICE_ATTR_FUNCTIONS",
+ "Consider renaming function(s)$rename\n" . $herecurr);
+ } else {
+ WARN("DEVICE_ATTR_PERMS",
+ "DEVICE_ATTR unusual permissions '$perms' used\n" . $herecurr);
+ }
+ }
+
+# Mode permission misuses where it seems decimal should be octal
+# This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
+# o Ignore module_param*(...) uses with a decimal 0 permission as that has a
+# specific definition of not visible in sysfs.
+# o Ignore proc_create*(...) uses with a decimal 0 permission as that means
+# use the default permissions
+ if ($^V && $^V ge 5.10.0 &&
+ defined $stat &&
+ $line =~ /$mode_perms_search/) {
+ foreach my $entry (@mode_permission_funcs) {
+ my $func = $entry->[0];
+ my $arg_pos = $entry->[1];
+
+ my $lc = $stat =~ tr@\n@@;
+ $lc = $lc + $linenr;
+ my $stat_real = get_stat_real($linenr, $lc);
+
+ my $skip_args = "";
+ if ($arg_pos > 1) {
+ $arg_pos--;
+ $skip_args = "(?:\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}";
+ }
+ my $test = "\\b$func\\s*\\(${skip_args}($FuncArg(?:\\|\\s*$FuncArg)*)\\s*[,\\)]";
+ if ($stat =~ /$test/) {
+ my $val = $1;
+ $val = $6 if ($skip_args ne "");
+ if (!($func =~ /^(?:module_param|proc_create)/ && $val eq "0") &&
+ (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
+ ($val =~ /^$Octal$/ && length($val) ne 4))) {
+ ERROR("NON_OCTAL_PERMISSIONS",
+ "Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real);
+ }
+ if ($val =~ /^$Octal$/ && (oct($val) & 02)) {
+ ERROR("EXPORTED_WORLD_WRITABLE",
+ "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real);
+ }
+ }
+ }
+ }
+
+# check for uses of S_<PERMS> that could be octal for readability
+ while ($line =~ m{\b($multi_mode_perms_string_search)\b}g) {
+ my $oval = $1;
+ my $octal = perms_to_octal($oval);
+ if (WARN("SYMBOLIC_PERMS",
+ "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/\Q$oval\E/$octal/;
+ }
+ }
+
+# validate content of MODULE_LICENSE against list from include/linux/module.h
+ if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) {
+ my $extracted_string = get_quoted_string($line, $rawline);
+ my $valid_licenses = qr{
+ GPL|
+ GPL\ v2|
+ GPL\ and\ additional\ rights|
+ Dual\ BSD/GPL|
+ Dual\ MIT/GPL|
+ Dual\ MPL/GPL|
+ Proprietary
+ }x;
+ if ($extracted_string !~ /^"(?:$valid_licenses)"$/x) {
+ WARN("MODULE_LICENSE",
+ "unknown module license " . $extracted_string . "\n" . $herecurr);
+ }
+ }