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parser: convert remaining pwarn() to flag controlled warns

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Make all warnings that go through pwarn() controllable by warning
flags. This adds several new warning control flags, documented in

  --help=warn

Convert --debug-cache to be unified with warning flags. So it can be
set by either
    --debug-cache
  or
    --warn=debug-cache

Also add an "all" option to be able to turn on all warnings.

MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/600
Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2020-08-28 08:35:45 -07:00
parent d50ada7159
commit f5c4927c85
8 changed files with 69 additions and 46 deletions
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34
parser/parser.h
View file

@ -52,11 +52,31 @@ class rule_t;
extern int parser_token; extern int parser_token;
#define WARN_RULE_NOT_ENFORCED 1 #define WARN_RULE_NOT_ENFORCED 0x1
#define WARN_RULE_DOWNGRADED 2 #define WARN_RULE_DOWNGRADED 0x2
#define WARN_ABI 4 #define WARN_ABI 0x4
#define WARN_DEPRECATED 8 #define WARN_DEPRECATED 0x8
#define WARN_DEV (WARN_RULE_NOT_ENFORCED | WARN_RULE_DOWNGRADED | WARN_ABI | WARN_DEPRECATED) #define WARN_CONFIG 0x10
#define WARN_CACHE 0x20
#define WARN_DEBUG_CACHE 0x40
#define WARN_JOBS 0x80
#define WARN_DANGEROUS 0x100
#define WARN_UNEXPECTED 0x200
#define WARN_FORMAT 0x400
#define WARN_MISSING 0x800
#define WARN_OVERRIDE 0x1000
#define WARN_DEV (WARN_RULE_NOT_ENFORCED | WARN_RULE_DOWNGRADED | WARN_ABI | \
WARN_DEPRECATED | WARN_DANGEROUS | WARN_UNEXPECTED | \
WARN_FORMAT | WARN_MISSING | WARN_OVERRIDE | WARN_DEBUG_CACHE)
#define DEFAULT_WARNINGS (WARN_CONFIG | WARN_CACHE | WARN_JOBS | \
WARN_UNEXPECTED | WARN_OVERRIDE)
#define WARN_ALL (WARN_RULE_NOT_ENFORCED | WARN_RULE_DOWNGRADED | WARN_ABI | \
WARN_DEPRECATED | WARN_CONFIG | WARN_CACHE | \
WARN_DEBUG_CACHE | WARN_JOBS | WARN_DANGEROUS | \
WARN_UNEXPECTED | WARN_FORMAT | WARN_MISSING | WARN_OVERRIDE)
extern dfaflags_t warnflags; extern dfaflags_t warnflags;
@ -331,10 +351,10 @@ extern char *profile_ns;
extern char *current_filename; extern char *current_filename;
extern FILE *ofile; extern FILE *ofile;
extern int read_implies_exec; extern int read_implies_exec;
extern void pwarn(const char *fmt, ...) __attribute__((__format__(__printf__, 1, 2))); extern void pwarnf(const char *fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
extern void common_warn_once(const char *name, const char *msg, const char **warned_name); extern void common_warn_once(const char *name, const char *msg, const char **warned_name);
#define pwarn_onflag(F, args...) do { if (warnflags & (F)) pwarn(args); } while (0) #define pwarn(F, args...) do { if (warnflags & (F)) pwarnf(args); } while (0)
/* from parser_main (cannot be used in tst builds) */ /* from parser_main (cannot be used in tst builds) */
extern int force_complain; extern int force_complain;

4
parser/parser_common.c
View file

@ -84,7 +84,7 @@ int current_lineno = 1;
int option = OPTION_ADD; int option = OPTION_ADD;
dfaflags_t dfaflags = (dfaflags_t)(DFA_CONTROL_TREE_NORMAL | DFA_CONTROL_TREE_SIMPLE | DFA_CONTROL_MINIMIZE | DFA_CONTROL_DIFF_ENCODE); dfaflags_t dfaflags = (dfaflags_t)(DFA_CONTROL_TREE_NORMAL | DFA_CONTROL_TREE_SIMPLE | DFA_CONTROL_MINIMIZE | DFA_CONTROL_DIFF_ENCODE);
dfaflags_t warnflags = 0; dfaflags_t warnflags = DEFAULT_WARNINGS;
const char *progname = __FILE__; const char *progname = __FILE__;
char *profile_ns = NULL; char *profile_ns = NULL;
@ -99,7 +99,7 @@ int read_implies_exec = 1;
int read_implies_exec = 0; int read_implies_exec = 0;
#endif #endif
void pwarn(const char *fmt, ...) void pwarnf(const char *fmt, ...)
{ {
va_list arg; va_list arg;
char *newfmt; char *newfmt;

2
parser/parser_interface.c
View file

@ -471,7 +471,7 @@ void sd_serialize_profile(std::ostringstream &buf, Profile *profile,
} }
sd_write_arrayend(buf); sd_write_arrayend(buf);
} else if (profile->net.allow && (warnflags & WARN_RULE_NOT_ENFORCED)) } else if (profile->net.allow && (warnflags & WARN_RULE_NOT_ENFORCED))
pwarn(_("profile %s network rules not enforced\n"), profile->name); pwarn(WARN_RULE_NOT_ENFORCED, _("profile %s network rules not enforced\n"), profile->name);
if (profile->policy.dfa) { if (profile->policy.dfa) {
sd_write_struct(buf, "policydb"); sd_write_struct(buf, "policydb");

33
parser/parser_main.c
View file

@ -80,7 +80,6 @@ int skip_mode_force = 0;
int abort_on_error = 0; /* stop processing profiles if error */ int abort_on_error = 0; /* stop processing profiles if error */
int skip_bad_cache_rebuild = 0; int skip_bad_cache_rebuild = 0;
int mru_skip_cache = 1; int mru_skip_cache = 1;
int debug_cache = 0;
/* for jobs_max and jobs /* for jobs_max and jobs
* LONG_MAX : no limit * LONG_MAX : no limit
@ -251,7 +250,17 @@ optflag_table_t warnflag_table[] = {
{ 0, "rule-downgraded", "warn if a rule is downgraded to a lesser but still enforcing rule", WARN_RULE_DOWNGRADED }, { 0, "rule-downgraded", "warn if a rule is downgraded to a lesser but still enforcing rule", WARN_RULE_DOWNGRADED },
{ 0, "abi", "warn if there are abi issues in the profile", WARN_ABI }, { 0, "abi", "warn if there are abi issues in the profile", WARN_ABI },
{ 0, "deprecated", "warn if something in the profile is deprecated", WARN_DEPRECATED }, { 0, "deprecated", "warn if something in the profile is deprecated", WARN_DEPRECATED },
{ 0, "config", "enable configuration warnings", WARN_CONFIG },
{ 0, "cache", "enable regular cache warnings", WARN_CACHE },
{ 0, "debug-cache", "enable warnings for debug cache file checks", WARN_DEBUG_CACHE },
{ 0, "jobs", "enable job control warnings", WARN_JOBS },
{ 0, "dangerous", "warn on dangerous policy", WARN_DANGEROUS },
{ 0, "unexpected", "warn when an unexpected condition is found", WARN_UNEXPECTED },
{ 0, "format", "warn on unnecessary or confusing formating", WARN_FORMAT },
{ 0, "missing", "warn when missing qualifier and a default is used", WARN_MISSING },
{ 0, "override", "warn when overriding", WARN_OVERRIDE },
{ 0, "dev", "turn on warnings that are useful for profile development", WARN_DEV }, { 0, "dev", "turn on warnings that are useful for profile development", WARN_DEV },
{ 0, "all", "turn on all warnings", WARN_ALL},
{ 0, NULL, NULL, 0 }, { 0, NULL, NULL, 0 },
}; };
@ -688,7 +697,7 @@ static int process_arg(int c, char *optarg)
} }
break; break;
case ARG_DEBUG_CACHE: case ARG_DEBUG_CACHE:
debug_cache = 1; warnflags |= WARN_DEBUG_CACHE;
break; break;
case 'j': case 'j':
jobs = process_jobs_arg("-j", optarg); jobs = process_jobs_arg("-j", optarg);
@ -766,7 +775,7 @@ static int process_config_file(const char *name)
f = fopen(name, "r"); f = fopen(name, "r");
if (!f) { if (!f) {
pwarn("config file '%s' not found\n", name); pwarn(WARN_CONFIG, "config file '%s' not found\n", name);
return 0; return 0;
} }
@ -1001,7 +1010,7 @@ int process_profile(int option, aa_kernel_interface *kernel_interface,
} }
} else { } else {
if (write_cache) if (write_cache)
pwarn("%s: cannot use or update cache, disable, or force-complain via stdin\n", progname); pwarn(WARN_CACHE, "%s: cannot use or update cache, disable, or force-complain via stdin\n", progname);
skip_cache = write_cache = 0; skip_cache = write_cache = 0;
} }
@ -1034,7 +1043,7 @@ int process_profile(int option, aa_kernel_interface *kernel_interface,
basename, basename,
O_RDONLY); O_RDONLY);
if (fd != -1) if (fd != -1)
pwarn(_("Could not get cachename for '%s'\n"), basename); pwarn(WARN_CACHE, _("Could not get cachename for '%s'\n"), basename);
} else { } else {
valid_read_cache(cachename); valid_read_cache(cachename);
} }
@ -1107,12 +1116,12 @@ int process_profile(int option, aa_kernel_interface *kernel_interface,
if (pc && write_cache && !force_complain) { if (pc && write_cache && !force_complain) {
writecachename = cache_filename(pc, 0, basename); writecachename = cache_filename(pc, 0, basename);
if (!writecachename) { if (!writecachename) {
pwarn("Cache write disabled: Cannot create cache file name '%s': %m\n", basename); pwarn(WARN_CACHE, "Cache write disabled: Cannot create cache file name '%s': %m\n", basename);
write_cache = 0; write_cache = 0;
} }
cachetmp = setup_cache_tmp(&cachetmpname, writecachename); cachetmp = setup_cache_tmp(&cachetmpname, writecachename);
if (cachetmp == -1) { if (cachetmp == -1) {
pwarn("Cache write disabled: Cannot create setup tmp cache file '%s': %m\n", writecachename); pwarn(WARN_CACHE, "Cache write disabled: Cannot create setup tmp cache file '%s': %m\n", writecachename);
write_cache = 0; write_cache = 0;
} }
} }
@ -1121,7 +1130,7 @@ int process_profile(int option, aa_kernel_interface *kernel_interface,
if (retval == 0 && write_cache) { if (retval == 0 && write_cache) {
if (cachetmp == -1) { if (cachetmp == -1) {
unlink(cachetmpname); unlink(cachetmpname);
pwarn("Warning failed to create cache: %s\n", pwarn(WARN_CACHE, "Warning failed to create cache: %s\n",
basename); basename);
} else { } else {
install_cache(cachetmpname, writecachename); install_cache(cachetmpname, writecachename);
@ -1259,7 +1268,7 @@ static void setup_parallel_compile(void)
jobs_max = compute_jobs(maxn, jobs_max); jobs_max = compute_jobs(maxn, jobs_max);
if (jobs > jobs_max) { if (jobs > jobs_max) {
pwarn("%s: Warning capping number of jobs to %ld * # of cpus == '%ld'", pwarn(WARN_JOBS, "%s: Warning capping number of jobs to %ld * # of cpus == '%ld'",
progname, jobs_max, jobs); progname, jobs_max, jobs);
jobs = jobs_max; jobs = jobs_max;
} else if (jobs < jobs_max) } else if (jobs < jobs_max)
@ -1429,7 +1438,7 @@ int main(int argc, char *argv[])
} }
if (create_cache_dir) if (create_cache_dir)
pwarn_onflag(WARN_DEPRECATED, _("The --create-cache-dir option is deprecated. Please use --write-cache.\n")); pwarn(WARN_DEPRECATED, _("The --create-cache-dir option is deprecated. Please use --write-cache.\n"));
retval = aa_policy_cache_new(&policy_cache, kernel_features, retval = aa_policy_cache_new(&policy_cache, kernel_features,
AT_FDCWD, cacheloc[0], max_caches); AT_FDCWD, cacheloc[0], max_caches);
if (retval) { if (retval) {
@ -1454,9 +1463,9 @@ int main(int argc, char *argv[])
for (i = 1; i < cacheloc_n; i++) { for (i = 1; i < cacheloc_n; i++) {
if (aa_policy_cache_add_ro_dir(policy_cache, AT_FDCWD, if (aa_policy_cache_add_ro_dir(policy_cache, AT_FDCWD,
cacheloc[i])) { cacheloc[i])) {
pwarn("Cache: failed to add read only location '%s', does not contain valid cache directory for the specified feature set\n", cacheloc[i]); pwarn(WARN_CACHE, "Cache: failed to add read only location '%s', does not contain valid cache directory for the specified feature set\n", cacheloc[i]);
} else if (show_cache) } else if (show_cache)
pwarn("Cache: added readonly location '%s'\n", cacheloc[i]); pwarn(WARN_CACHE, "Cache: added readonly location '%s'\n", cacheloc[i]);
} }
} }
} }

6
parser/parser_misc.c
View file

@ -276,7 +276,7 @@ static int capable_add_cap(const char *str, int len, unsigned int cap,
struct capability_table *ent = find_cap_entry_by_name(name); struct capability_table *ent = find_cap_entry_by_name(name);
if (ent) { if (ent) {
if (ent->cap != cap) { if (ent->cap != cap) {
pwarn("feature capability '%s:%d' does not equal expected %d. Ignoring ...\n", name, cap, ent->cap); pwarn(WARN_UNEXPECTED, "feature capability '%s:%d' does not equal expected %d. Ignoring ...\n", name, cap, ent->cap);
/* TODO: make warn to error config */ /* TODO: make warn to error config */
return 0; return 0;
} }
@ -522,7 +522,7 @@ static int warned_uppercase = 0;
void warn_uppercase(void) void warn_uppercase(void)
{ {
if (!warned_uppercase) { if (!warned_uppercase) {
pwarn_onflag(WARN_DEPRECATED, _("Uppercase qualifiers \"RWLIMX\" are deprecated, please convert to lowercase\n" pwarn(WARN_DEPRECATED, _("Uppercase qualifiers \"RWLIMX\" are deprecated, please convert to lowercase\n"
"See the apparmor.d(5) manpage for details.\n")); "See the apparmor.d(5) manpage for details.\n"));
warned_uppercase = 1; warned_uppercase = 1;
} }
@ -598,7 +598,7 @@ reeval:
case COD_UNSAFE_UNCONFINED_CHAR: case COD_UNSAFE_UNCONFINED_CHAR:
tmode = AA_EXEC_UNSAFE; tmode = AA_EXEC_UNSAFE;
pwarn(_("Unconfined exec qualifier (%c%c) allows some dangerous environment variables " pwarn(WARN_DANGEROUS, _("Unconfined exec qualifier (%c%c) allows some dangerous environment variables "
"to be passed to the unconfined process; 'man 5 apparmor.d' for details.\n"), "to be passed to the unconfined process; 'man 5 apparmor.d' for details.\n"),
COD_UNSAFE_UNCONFINED_CHAR, COD_EXEC_CHAR); COD_UNSAFE_UNCONFINED_CHAR, COD_EXEC_CHAR);
/* fall through */ /* fall through */

2
parser/parser_regex.c
View file

@ -382,7 +382,7 @@ pattern_t convert_aaregex_to_pcre(const char *aare, int anchor, int glob,
/* quoting mark used for something that /* quoting mark used for something that
* does not need to be quoted; give a * does not need to be quoted; give a
* warning */ * warning */
pwarn("Character %c was quoted " pwarn(WARN_FORMAT, "Character %c was quoted"
"unnecessarily, dropped preceding" "unnecessarily, dropped preceding"
" quote ('\\') character\n", " quote ('\\') character\n",
*sptr); *sptr);

17
parser/parser_yacc.y
View file

@ -305,7 +305,7 @@ list: preamble
strlen(default_features_abi))) { strlen(default_features_abi))) {
yyerror(_("Failed to setup default policy feature abi")); yyerror(_("Failed to setup default policy feature abi"));
} }
pwarn_onflag(WARN_ABI, _("%s: File '%s' missing feature abi, falling back to default policy feature abi\n"), progname, current_filename); pwarn(WARN_ABI, _("%s: File '%s' missing feature abi, falling back to default policy feature abi\n"), progname, current_filename);
} }
} }
if (!add_cap_feature_mask(policy_features, if (!add_cap_feature_mask(policy_features,
@ -358,7 +358,7 @@ profile_base: TOK_ID opt_id_or_var opt_cond_list flags TOK_OPEN rules TOK_CLOSE
* --namespace-string command line option * --namespace-string command line option
*/ */
if (prof->ns && strcmp(prof->ns, profile_ns)) if (prof->ns && strcmp(prof->ns, profile_ns))
pwarn("%s: -n %s overriding policy specified namespace :%s:\n", pwarn(WARN_OVERRIDE, "%s: -n %s overriding policy specified namespace :%s:\n",
progname, profile_ns, prof->ns); progname, profile_ns, prof->ns);
free(prof->ns); free(prof->ns);
@ -401,7 +401,7 @@ profile: opt_profile_flag profile_base
PDEBUG("Matched: %s { ... }\n", $2->name); PDEBUG("Matched: %s { ... }\n", $2->name);
if ($2->name[0] == '/') if ($2->name[0] == '/')
pwarn_onflag(WARN_DEPRECATED, _("The use of file paths as profile names is deprecated. See man apparmor.d for more information\n")); pwarn(WARN_DEPRECATED, _("The use of file paths as profile names is deprecated. See man apparmor.d for more information\n"));
if ($2->name[0] != '/' && !($1 || $2->ns)) if ($2->name[0] != '/' && !($1 || $2->ns))
yyerror(_("Profile names must begin with a '/', namespace or keyword 'profile' or 'hat'.")); yyerror(_("Profile names must begin with a '/', namespace or keyword 'profile' or 'hat'."));
@ -951,7 +951,7 @@ rules: rules TOK_SET TOK_RLIMIT TOK_ID TOK_LE TOK_VALUE opt_id TOK_END_OF_RULE
else if (tmp < 0LL) else if (tmp < 0LL)
yyerror("RLIMIT '%s' invalid value %s\n", $4, $6); yyerror("RLIMIT '%s' invalid value %s\n", $4, $6);
if (!$7) if (!$7)
pwarn(_("RLIMIT 'cpu' no units specified using default units of seconds\n")); pwarn(WARN_MISSING, _("RLIMIT 'cpu' no units specified using default units of seconds\n"));
value = tmp; value = tmp;
break; break;
#ifdef RLIMIT_RTTIME #ifdef RLIMIT_RTTIME
@ -963,7 +963,7 @@ rules: rules TOK_SET TOK_RLIMIT TOK_ID TOK_LE TOK_VALUE opt_id TOK_END_OF_RULE
if (tmp < 0LL) if (tmp < 0LL)
yyerror("RLIMIT '%s' invalid value %s %s\n", $4, $6, $7 ? $7 : ""); yyerror("RLIMIT '%s' invalid value %s %s\n", $4, $6, $7 ? $7 : "");
if (!$7) if (!$7)
pwarn(_("RLIMIT 'rttime' no units specified using default units of microseconds\n")); pwarn(WARN_MISSING, _("RLIMIT 'rttime' no units specified using default units of microseconds\n"));
value = tmp; value = tmp;
break; break;
#endif #endif
@ -1570,9 +1570,8 @@ change_profile: TOK_CHANGE_PROFILE opt_exec_mode opt_id opt_named_transition TOK
if (exec_mode == EXEC_MODE_UNSAFE) if (exec_mode == EXEC_MODE_UNSAFE)
mode |= ALL_AA_EXEC_UNSAFE; mode |= ALL_AA_EXEC_UNSAFE;
else if (exec_mode == EXEC_MODE_SAFE && else if (exec_mode == EXEC_MODE_SAFE &&
!features_supports_stacking && !features_supports_stacking) {
warnflags & WARN_RULE_DOWNGRADED) { pwarn(WARN_RULE_DOWNGRADED, "downgrading change_profile safe rule to unsafe due to lack of necessary kernel support\n");
pwarn("downgrading change_profile safe rule to unsafe due to lack of necessary kernel support\n");
/** /**
* No need to do anything because 'unsafe' exec * No need to do anything because 'unsafe' exec
* mode is the only supported mode of * mode is the only supported mode of
@ -1813,7 +1812,7 @@ static void abi_features(char *filename, bool search)
} }
if (policy_features) { if (policy_features) {
if (!aa_features_is_equal(tmp_features, policy_features)) { if (!aa_features_is_equal(tmp_features, policy_features)) {
pwarn_onflag(WARN_ABI, _("%s: %s features abi '%s' differs from policy declared feature abi, using the features abi declared in policy\n"), progname, current_filename, filename); pwarn(WARN_ABI, _("%s: %s features abi '%s' differs from policy declared feature abi, using the features abi declared in policy\n"), progname, current_filename, filename);
} }
aa_features_unref(tmp_features); aa_features_unref(tmp_features);
} else { } else {

17
parser/policy_cache.c
View file

@ -46,15 +46,13 @@ bool valid_cached_file_version(const char *cachename)
} }
size_t res = fread(buffer, 1, HEADER_STRING_SIZE + VERSION_STRING_SIZE, f); size_t res = fread(buffer, 1, HEADER_STRING_SIZE + VERSION_STRING_SIZE, f);
if (res < HEADER_STRING_SIZE + VERSION_STRING_SIZE) { if (res < HEADER_STRING_SIZE + VERSION_STRING_SIZE) {
if (debug_cache) pwarn(WARN_DEBUG_CACHE, "%s: cache file '%s' invalid size\n", progname, cachename);
pwarn("%s: cache file '%s' invalid size\n", progname, cachename);
return false; return false;
} }
/* 12 byte header that is always the same and then 4 byte version # */ /* 12 byte header that is always the same and then 4 byte version # */
if (memcmp(buffer, header_string, HEADER_STRING_SIZE) != 0) { if (memcmp(buffer, header_string, HEADER_STRING_SIZE) != 0) {
if (debug_cache) pwarn(WARN_DEBUG_CACHE, "%s: cache file '%s' has wrong header\n", progname, cachename);
pwarn("%s: cache file '%s' has wrong header\n", progname, cachename);
return false; return false;
} }
@ -63,8 +61,7 @@ bool valid_cached_file_version(const char *cachename)
parser_abi_version, parser_abi_version,
kernel_abi_version)); kernel_abi_version));
if (memcmp(buffer + HEADER_STRING_SIZE, &version, VERSION_STRING_SIZE) != 0) { if (memcmp(buffer + HEADER_STRING_SIZE, &version, VERSION_STRING_SIZE) != 0) {
if (debug_cache) pwarn(WARN_DEBUG_CACHE, "%s: cache file '%s' has wrong version\n", progname, cachename);
pwarn("%s: cache file '%s' has wrong version\n", progname, cachename);
return false; return false;
} }
@ -89,8 +86,7 @@ void update_mru_tstamp(FILE *file, const char *name)
if (tstamp_is_null(cache_tstamp)) if (tstamp_is_null(cache_tstamp))
return; return;
if (tstamp_cmp(stat_file.st_mtim, cache_tstamp) > 0) { if (tstamp_cmp(stat_file.st_mtim, cache_tstamp) > 0) {
if (debug_cache) pwarn(WARN_DEBUG_CACHE, "%s: file '%s' is newer than cache file\n", progname, name);
pwarn("%s: file '%s' is newer than cache file\n", progname, name);
mru_skip_cache = 1; mru_skip_cache = 1;
} }
} }
@ -124,8 +120,7 @@ void valid_read_cache(const char *cachename)
} else { } else {
if (!cond_clear_cache) if (!cond_clear_cache)
write_cache = 0; write_cache = 0;
if (debug_cache) pwarn(WARN_DEBUG_CACHE, "%s: Invalid or missing cache file '%s' (%s)\n", progname, cachename, strerror(errno));
pwarn("%s: Invalid or missing cache file '%s' (%s)\n", progname, cachename, strerror(errno));
} }
} }
} }
@ -184,7 +179,7 @@ void install_cache(const char *cachetmpname, const char *cachename)
} }
if (rename(cachetmpname, cachename) < 0) { if (rename(cachetmpname, cachename) < 0) {
pwarn("Warning failed to write cache: %s\n", cachename); pwarn(WARN_CACHE, "Warning failed to write cache: %s\n", cachename);
unlink(cachetmpname); unlink(cachetmpname);
} }
else if (show_cache) { else if (show_cache) {