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authorChristian G├Âttsche <cgzones@googlemail.com>2022-05-02 16:43:38 +0200
committerPaul Moore <paul@paul-moore.com>2022-05-03 15:53:49 -0400
commitded34574d4d351ab0ca095a45496b393cef611c2 (patch)
tree6884a97c4ba2c10ad542db83cfbd8afeab326895 /scripts/selinux/genheaders
parentselinux: fix indentation level of mls_ops block (diff)
downloadlinux-dev-ded34574d4d351ab0ca095a45496b393cef611c2.tar.xz
linux-dev-ded34574d4d351ab0ca095a45496b393cef611c2.zip
selinux: declare data arrays const
The arrays for the policy capability names, the initial sid identifiers and the class and permission names are not changed at runtime. Declare them const to avoid accidental modification. Do not override the classmap and the initial sid list in the build time script genheaders. Check flose(3) is successful in genheaders.c, otherwise the written data might be corrupted or incomplete. Signed-off-by: Christian G├Âttsche <cgzones@googlemail.com> [PM: manual merge due to fuzz, minor style tweaks] Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'scripts/selinux/genheaders')
-rw-r--r--scripts/selinux/genheaders/genheaders.c75
1 files changed, 45 insertions, 30 deletions
diff --git a/scripts/selinux/genheaders/genheaders.c b/scripts/selinux/genheaders/genheaders.c
index f355b3e0e968..15520806889e 100644
--- a/scripts/selinux/genheaders/genheaders.c
+++ b/scripts/selinux/genheaders/genheaders.c
@@ -59,35 +59,27 @@ int main(int argc, char *argv[])
exit(2);
}
- for (i = 0; secclass_map[i].name; i++) {
- struct security_class_mapping *map = &secclass_map[i];
- map->name = stoupperx(map->name);
- for (j = 0; map->perms[j]; j++)
- map->perms[j] = stoupperx(map->perms[j]);
- }
-
- isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
- for (i = 1; i < isids_len; i++) {
- const char *s = initial_sid_to_string[i];
-
- if (s)
- initial_sid_to_string[i] = stoupperx(s);
- }
-
fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
for (i = 0; secclass_map[i].name; i++) {
- struct security_class_mapping *map = &secclass_map[i];
- fprintf(fout, "#define SECCLASS_%-39s %2d\n", map->name, i+1);
+ char *name = stoupperx(secclass_map[i].name);
+
+ fprintf(fout, "#define SECCLASS_%-39s %2d\n", name, i+1);
+ free(name);
}
fprintf(fout, "\n");
+ isids_len = sizeof(initial_sid_to_string) / sizeof(char *);
for (i = 1; i < isids_len; i++) {
const char *s = initial_sid_to_string[i];
- if (s)
- fprintf(fout, "#define SECINITSID_%-39s %2d\n", s, i);
+ if (s) {
+ char *sidname = stoupperx(s);
+
+ fprintf(fout, "#define SECINITSID_%-39s %2d\n", sidname, i);
+ free(sidname);
+ }
}
fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
@@ -96,10 +88,14 @@ int main(int argc, char *argv[])
fprintf(fout, "\tswitch (kern_tclass) {\n");
for (i = 0; secclass_map[i].name; i++) {
static char s[] = "SOCKET";
- struct security_class_mapping *map = &secclass_map[i];
- int len = strlen(map->name), l = sizeof(s) - 1;
- if (len >= l && memcmp(map->name + len - l, s, l) == 0)
- fprintf(fout, "\tcase SECCLASS_%s:\n", map->name);
+ int len, l;
+ char *name = stoupperx(secclass_map[i].name);
+
+ len = strlen(name);
+ l = sizeof(s) - 1;
+ if (len >= l && memcmp(name + len - l, s, l) == 0)
+ fprintf(fout, "\tcase SECCLASS_%s:\n", name);
+ free(name);
}
fprintf(fout, "\t\tsock = true;\n");
fprintf(fout, "\t\tbreak;\n");
@@ -110,33 +106,52 @@ int main(int argc, char *argv[])
fprintf(fout, "}\n");
fprintf(fout, "\n#endif\n");
- fclose(fout);
+
+ if (fclose(fout) != 0) {
+ fprintf(stderr, "Could not successfully close %s: %s\n",
+ argv[1], strerror(errno));
+ exit(4);
+ }
fout = fopen(argv[2], "w");
if (!fout) {
fprintf(stderr, "Could not open %s for writing: %s\n",
argv[2], strerror(errno));
- exit(4);
+ exit(5);
}
fprintf(fout, "/* This file is automatically generated. Do not edit. */\n");
fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
for (i = 0; secclass_map[i].name; i++) {
- struct security_class_mapping *map = &secclass_map[i];
- int len = strlen(map->name);
+ const struct security_class_mapping *map = &secclass_map[i];
+ int len;
+ char *name = stoupperx(map->name);
+
+ len = strlen(name);
for (j = 0; map->perms[j]; j++) {
+ char *permname;
+
if (j >= 32) {
fprintf(stderr, "Too many permissions to fit into an access vector at (%s, %s).\n",
map->name, map->perms[j]);
exit(5);
}
- fprintf(fout, "#define %s__%-*s 0x%08xU\n", map->name,
- 39-len, map->perms[j], 1U<<j);
+ permname = stoupperx(map->perms[j]);
+ fprintf(fout, "#define %s__%-*s 0x%08xU\n", name,
+ 39-len, permname, 1U<<j);
+ free(permname);
}
+ free(name);
}
fprintf(fout, "\n#endif\n");
- fclose(fout);
+
+ if (fclose(fout) != 0) {
+ fprintf(stderr, "Could not successfully close %s: %s\n",
+ argv[2], strerror(errno));
+ exit(6);
+ }
+
exit(0);
}