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authorJoe Perches <joe@perches.com>2016-10-11 23:52:19 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-12 01:06:31 +0300
commit459cf0ae5d6600592a539bc861c84e14ed1a5bcb (patch)
treef4fa23f9bedb60aa3b0d2fae55bfff46f64d63e4
parentca0d8929e75ab1f860f61208d46955f280a1b05e (diff)
downloadlinux-459cf0ae5d6600592a539bc861c84e14ed1a5bcb.tar.xz
checkpatch: improve the octal permissions tests
The function calls with octal permissions commonly span multiple lines. The current test is line oriented and fails to find some matches. Make the test use the $stat variable instead of the $line variable to span multiple lines. Also add a few functions to the known functions with permissions list. Move the SYMBOLIC_PERMS test to a separate section to find all the S_<FOO> permissions in any form not just those that have specific function names. This can now find and fix permissions uses like: .mode = S_<FOO> | S_<BAR>; Link: http://lkml.kernel.org/r/b51bab60530912aae4ac420119d465c5b206f19f.1475030406.git.joe@perches.com Signed-off-by: Joe Perches <joe@perches.com> Tested-by: Ramiro Oliveira <roliveir@synopsys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rwxr-xr-xscripts/checkpatch.pl60
1 files changed, 44 insertions, 16 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3373c65fef1c..a8368d1c4348 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -524,7 +524,11 @@ our @mode_permission_funcs = (
["module_param_array_named", 5],
["debugfs_create_(?:file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2],
["proc_create(?:_data|)", 2],
- ["(?:CLASS|DEVICE|SENSOR)_ATTR", 2],
+ ["(?:CLASS|DEVICE|SENSOR|SENSOR_DEVICE|IIO_DEVICE)_ATTR", 2],
+ ["IIO_DEV_ATTR_[A-Z_]+", 1],
+ ["SENSOR_(?:DEVICE_|)ATTR_2", 2],
+ ["SENSOR_TEMPLATE(?:_2|)", 3],
+ ["__ATTR", 2],
);
#Create a search pattern for all these functions to speed up a loop below
@@ -6092,45 +6096,69 @@ sub process {
# Mode permission misuses where it seems decimal should be octal
# This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
if ($^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 $stat_real = raw_line($linenr, 0);
+ for (my $count = $linenr + 1; $count <= $lc; $count++) {
+ $stat_real = $stat_real . "\n" . raw_line($count, 0);
+ }
+
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*$FuncArg)*)\\s*[,\\)]";
- if ($line =~ /$test/) {
+ if ($stat =~ /$test/) {
my $val = $1;
$val = $6 if ($skip_args ne "");
if (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
($val =~ /^$Octal$/ && length($val) ne 4)) {
ERROR("NON_OCTAL_PERMISSIONS",
- "Use 4 digit octal (0777) not decimal permissions\n" . $herecurr);
+ "Use 4 digit octal (0777) not decimal permissions\n" . "$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" . $herecurr);
- }
- if ($val =~ /\b$mode_perms_string_search\b/) {
- my $to = 0;
- while ($val =~ /\b($mode_perms_string_search)\b(?:\s*\|\s*)?\s*/g) {
- $to |= $mode_permission_string_types{$1};
- }
- my $new = sprintf("%04o", $to);
- if (WARN("SYMBOLIC_PERMS",
- "Symbolic permissions are not preferred. Consider using octal permissions $new.\n" . $herecurr) &&
- $fix) {
- $fixed[$fixlinenr] =~ s/\Q$val\E/$new/;
- }
+ "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real);
}
}
}
}
+# check for uses of S_<PERMS> that could be octal for readability
+ if ($line =~ /\b$mode_perms_string_search\b/) {
+ my $val = "";
+ my $oval = "";
+ my $to = 0;
+ my $curpos = 0;
+ my $lastpos = 0;
+ while ($line =~ /\b(($mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) {
+ $curpos = pos($line);
+ my $match = $2;
+ my $omatch = $1;
+ last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos));
+ $lastpos = $curpos;
+ $to |= $mode_permission_string_types{$match};
+ $val .= '\s*\|\s*' if ($val ne "");
+ $val .= $match;
+ $oval .= $omatch;
+ }
+ $oval =~ s/^\s*\|\s*//;
+ $oval =~ s/\s*\|\s*$//;
+ my $octal = sprintf("%04o", $to);
+ if (WARN("SYMBOLIC_PERMS",
+ "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
+ $fix) {
+ $fixed[$fixlinenr] =~ s/$val/$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);