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check asprintf return value (fix #471)

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Yves Rutschle 2024-09-08 23:11:50 +02:00
parent 686d1f7cb6
commit 9243a6e369
5 changed files with 97 additions and 51 deletions
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69
echosrv-conf.c
View File

@ -1,8 +1,8 @@
/* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README) /* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README)
* on Wed Jul 10 15:35:54 2024. * on Sun Sep 8 23:10:29 2024.
# conf2struct: generate libconf parsers that read to structs # conf2struct: generate libconf parsers that read to structs
# Copyright (C) 2018-2021 Yves Rutschle # Copyright (C) 2018-2024 Yves Rutschle
# All rights reserved. # All rights reserved.
# #
# Redistribution and use in source and binary forms, with or without # Redistribution and use in source and binary forms, with or without
@ -36,6 +36,8 @@
#include <stdlib.h> #include <stdlib.h>
#include <stddef.h> #include <stddef.h>
#include <stdio.h> #include <stdio.h>
#include <stdarg.h>
#include <setjmp.h>
#include "echosrv-conf.h" #include "echosrv-conf.h"
#include "argtable3.h" #include "argtable3.h"
#ifdef LIBPCRE #ifdef LIBPCRE
@ -216,6 +218,19 @@ char* config_error_text(config_t* c) {
} }
#endif #endif
static jmp_buf c2s_asprintf_fail;
static int c2s_asprintf(char **restrict strp, const char *restrict fmt, ...)
{
va_list ap;
va_start(ap,fmt);
int res = vasprintf(strp, fmt, ap);
va_end(ap);
if (res == -1) longjmp(c2s_asprintf_fail, res);
return res;
}
/* This is the same as config_setting_lookup_string() except /* This is the same as config_setting_lookup_string() except
it allocates a new string which belongs to the caller */ it allocates a new string which belongs to the caller */
static int myconfig_setting_lookup_stringcpy( static int myconfig_setting_lookup_stringcpy(
@ -226,7 +241,7 @@ static int myconfig_setting_lookup_stringcpy(
const char* str; const char* str;
*value = NULL; *value = NULL;
if (config_setting_lookup_string(setting, name, &str) == CONFIG_TRUE) { if (config_setting_lookup_string(setting, name, &str) == CONFIG_TRUE) {
asprintf(value, "%s", str); c2s_asprintf(value, "%s", str);
return CONFIG_TRUE; return CONFIG_TRUE;
} else { } else {
return CONFIG_FALSE; return CONFIG_FALSE;
@ -310,7 +325,7 @@ static int settingcpy(config_type type, void* target, const config_setting_t* se
break; break;
case CFG_STRING: case CFG_STRING:
asprintf(&str, "%s", config_setting_get_string(setting)); c2s_asprintf(&str, "%s", config_setting_get_string(setting));
val.def_string = str; val.def_string = str;
*(char**)target = val.def_string; *(char**)target = val.def_string;
break; break;
@ -353,7 +368,7 @@ static int clcpy(config_type type, void* target, const void* cl_arg)
break; break;
case CFG_STRING: case CFG_STRING:
asprintf(&str, "%s", (*(struct arg_str**)cl_arg)->sval[0]); c2s_asprintf(&str, "%s", (*(struct arg_str**)cl_arg)->sval[0]);
val.def_string = str; val.def_string = str;
*(char**)target = val.def_string; *(char**)target = val.def_string;
break; break;
@ -765,7 +780,7 @@ static int read_block_setval(void* target,
/* setting is present in cfg, look it up */ /* setting is present in cfg, look it up */
if (lookup_typed_ud(cfg, target, desc) != CONFIG_TRUE) { if (lookup_typed_ud(cfg, target, desc) != CONFIG_TRUE) {
TRACE_READ((" but wrong type (expected %s) ", type2str[desc->type])); TRACE_READ((" but wrong type (expected %s) ", type2str[desc->type]));
asprintf(errmsg, "Option \"%s\" wrong type, expected %s\n", c2s_asprintf(errmsg, "Option \"%s\" wrong type, expected %s\n",
desc->name, type2str[desc->type]); desc->name, type2str[desc->type]);
return 0; return 0;
} }
@ -822,7 +837,7 @@ static int read_block(config_setting_t* cfg, void* target, struct config_desc* d
set = read_block_setval(target, cfg, desc, errmsg); set = read_block_setval(target, cfg, desc, errmsg);
if (!set && desc->mandatory) { if (!set && desc->mandatory) {
asprintf(errmsg, "Mandatory option \"%s\" not found", desc->name); c2s_asprintf(errmsg, "Mandatory option \"%s\" not found", desc->name);
return 0; return 0;
} }
@ -980,13 +995,13 @@ static int regcompmatch_posix( regmatch_t* pmatch,
int errlen = regerror(res, &preg, NULL, 0); int errlen = regerror(res, &preg, NULL, 0);
regerr = malloc(errlen); regerr = malloc(errlen);
regerror(res, &preg, regerr, errlen); regerror(res, &preg, regerr, errlen);
asprintf(errmsg, "compiling pattern /%s/:%s", arg->regex, regerr); c2s_asprintf(errmsg, "compiling pattern /%s/:%s", arg->regex, regerr);
free(regerr); free(regerr);
return 0; return 0;
} }
res = regexec(&preg, arg_cl->sval[arg_index], MAX_MATCH, &pmatch[0], 0); res = regexec(&preg, arg_cl->sval[arg_index], MAX_MATCH, &pmatch[0], 0);
if (res) { if (res) {
asprintf(errmsg, "--%s %s: Illegal argument", c2s_asprintf(errmsg, "--%s %s: Illegal argument",
arg_cl->hdr.longopts, arg_cl->hdr.longopts,
arg->regex); arg->regex);
return 0; return 0;
@ -1012,7 +1027,7 @@ static int regcompmatch_pcre2( regmatch_t* pmatch,
pcre = pcre2_compile((PCRE2_SPTR8)arg->regex, PCRE2_ZERO_TERMINATED, 0, &error, &error_offset, NULL); pcre = pcre2_compile((PCRE2_SPTR8)arg->regex, PCRE2_ZERO_TERMINATED, 0, &error, &error_offset, NULL);
if (!pcre) { if (!pcre) {
pcre2_get_error_message(error, err_str, sizeof(err_str)); pcre2_get_error_message(error, err_str, sizeof(err_str));
asprintf(errmsg, "compiling pattern /%s/:%d: %s at offset %ld\n", c2s_asprintf(errmsg, "compiling pattern /%s/:%d: %s at offset %ld\n",
arg->regex, error, err_str, error_offset); arg->regex, error, err_str, error_offset);
return 0; return 0;
} }
@ -1022,7 +1037,7 @@ static int regcompmatch_pcre2( regmatch_t* pmatch,
0, 0, matches, NULL); 0, 0, matches, NULL);
if (res < 0) { if (res < 0) {
pcre2_get_error_message(res, err_str, sizeof(err_str)); pcre2_get_error_message(res, err_str, sizeof(err_str));
asprintf(errmsg, "matching %s =~ /%s/:%d: %s\n", c2s_asprintf(errmsg, "matching %s =~ /%s/:%d: %s\n",
arg_cl->sval[arg_index], arg->regex, res, err_str); arg_cl->sval[arg_index], arg->regex, res, err_str);
return 0; return 0;
} }
@ -1111,13 +1126,13 @@ static int c2s_parse_file(const char* filename, config_t* c, char**errmsg)
/* Read config file */ /* Read config file */
if (config_read_file(c, filename) == CONFIG_FALSE) { if (config_read_file(c, filename) == CONFIG_FALSE) {
if (config_error_line(c) != 0) { if (config_error_line(c) != 0) {
asprintf(errmsg, "%s:%d:%s", c2s_asprintf(errmsg, "%s:%d:%s",
filename, filename,
config_error_line(c), config_error_line(c),
config_error_text(c)); config_error_text(c));
return 0; return 0;
} }
asprintf(errmsg, "%s:%s", filename, config_error_text(c)); c2s_asprintf(errmsg, "%s:%s", filename, config_error_text(c));
return 0; return 0;
} }
return 1; return 1;
@ -1128,23 +1143,23 @@ static void scalar_to_string(char** strp, config_setting_t* s)
{ {
switch(config_setting_type(s)) { switch(config_setting_type(s)) {
case CONFIG_TYPE_INT: case CONFIG_TYPE_INT:
asprintf(strp, "%d\n", config_setting_get_int(s)); c2s_asprintf(strp, "%d\n", config_setting_get_int(s));
break; break;
case CONFIG_TYPE_BOOL: case CONFIG_TYPE_BOOL:
asprintf(strp, "%s\n", config_setting_get_bool(s) ? "[true]" : "[false]" ); c2s_asprintf(strp, "%s\n", config_setting_get_bool(s) ? "[true]" : "[false]" );
break; break;
case CONFIG_TYPE_INT64: case CONFIG_TYPE_INT64:
asprintf(strp, "%lld\n", config_setting_get_int64(s)); c2s_asprintf(strp, "%lld\n", config_setting_get_int64(s));
break; break;
case CONFIG_TYPE_FLOAT: case CONFIG_TYPE_FLOAT:
asprintf(strp, "%lf\n", config_setting_get_float(s)); c2s_asprintf(strp, "%lf\n", config_setting_get_float(s));
break; break;
case CONFIG_TYPE_STRING: case CONFIG_TYPE_STRING:
asprintf(strp, "%s\n", config_setting_get_string(s)); c2s_asprintf(strp, "%s\n", config_setting_get_string(s));
break; break;
default: /* This means a bug */ default: /* This means a bug */
@ -1172,9 +1187,9 @@ static int cfg_as_string(config_setting_t* parent, const char* path, char** strp
if(config_setting_is_list(parent) || if(config_setting_is_list(parent) ||
config_setting_is_array(parent)) { config_setting_is_array(parent)) {
asprintf(&subpath, "%s[%d]%s", path, config_setting_index(child), name); c2s_asprintf(&subpath, "%s[%d]%s", path, config_setting_index(child), name);
} else { } else {
asprintf(&subpath, "%s/%s", path, name); c2s_asprintf(&subpath, "%s/%s", path, name);
} }
if (config_setting_is_scalar(child)) { if (config_setting_is_scalar(child)) {
@ -1182,12 +1197,12 @@ static int cfg_as_string(config_setting_t* parent, const char* path, char** strp
/* Add value to the output string */ /* Add value to the output string */
if (*strp) { if (*strp) {
asprintf(&old, "%s", *strp); c2s_asprintf(&old, "%s", *strp);
free(*strp); free(*strp);
} else { } else {
asprintf(&old, "%s", ""); c2s_asprintf(&old, "%s", "");
} }
asprintf(strp, "%s%s:%s", old, subpath, value); c2s_asprintf(strp, "%s%s:%s", old, subpath, value);
free(value); free(value);
free(old); free(old);
@ -1224,6 +1239,14 @@ int echocfg_cl_parse(int argc, char* argv[], struct echocfg_item* cfg)
}; };
/* Set up failure handler in case asprintf() runs out of
* memory */
;
if (setjmp(c2s_asprintf_fail)) {
fprintf(stderr, "asprintf: probably out of memory\n");
return -1;
}
/* Parse command line */ /* Parse command line */
nerrors = arg_parse(argc, argv, argtable); nerrors = arg_parse(argc, argv, argtable);
if (nerrors) { if (nerrors) {

4
echosrv-conf.h
View File

@ -1,8 +1,8 @@
/* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README) /* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README)
* on Wed Jul 10 15:35:54 2024. * on Sun Sep 8 23:10:29 2024.
# conf2struct: generate libconf parsers that read to structs # conf2struct: generate libconf parsers that read to structs
# Copyright (C) 2018-2021 Yves Rutschle # Copyright (C) 2018-2024 Yves Rutschle
# All rights reserved. # All rights reserved.
# #
# Redistribution and use in source and binary forms, with or without # Redistribution and use in source and binary forms, with or without

69
sslh-conf.c
View File

@ -1,8 +1,8 @@
/* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README) /* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README)
* on Wed Jul 10 15:35:54 2024. * on Sun Sep 8 23:10:29 2024.
# conf2struct: generate libconf parsers that read to structs # conf2struct: generate libconf parsers that read to structs
# Copyright (C) 2018-2021 Yves Rutschle # Copyright (C) 2018-2024 Yves Rutschle
# All rights reserved. # All rights reserved.
# #
# Redistribution and use in source and binary forms, with or without # Redistribution and use in source and binary forms, with or without
@ -36,6 +36,8 @@
#include <stdlib.h> #include <stdlib.h>
#include <stddef.h> #include <stddef.h>
#include <stdio.h> #include <stdio.h>
#include <stdarg.h>
#include <setjmp.h>
#include "sslh-conf.h" #include "sslh-conf.h"
#include "argtable3.h" #include "argtable3.h"
#ifdef LIBPCRE #ifdef LIBPCRE
@ -216,6 +218,19 @@ char* config_error_text(config_t* c) {
} }
#endif #endif
static jmp_buf c2s_asprintf_fail;
static int c2s_asprintf(char **restrict strp, const char *restrict fmt, ...)
{
va_list ap;
va_start(ap,fmt);
int res = vasprintf(strp, fmt, ap);
va_end(ap);
if (res == -1) longjmp(c2s_asprintf_fail, res);
return res;
}
/* This is the same as config_setting_lookup_string() except /* This is the same as config_setting_lookup_string() except
it allocates a new string which belongs to the caller */ it allocates a new string which belongs to the caller */
static int myconfig_setting_lookup_stringcpy( static int myconfig_setting_lookup_stringcpy(
@ -226,7 +241,7 @@ static int myconfig_setting_lookup_stringcpy(
const char* str; const char* str;
*value = NULL; *value = NULL;
if (config_setting_lookup_string(setting, name, &str) == CONFIG_TRUE) { if (config_setting_lookup_string(setting, name, &str) == CONFIG_TRUE) {
asprintf(value, "%s", str); c2s_asprintf(value, "%s", str);
return CONFIG_TRUE; return CONFIG_TRUE;
} else { } else {
return CONFIG_FALSE; return CONFIG_FALSE;
@ -310,7 +325,7 @@ static int settingcpy(config_type type, void* target, const config_setting_t* se
break; break;
case CFG_STRING: case CFG_STRING:
asprintf(&str, "%s", config_setting_get_string(setting)); c2s_asprintf(&str, "%s", config_setting_get_string(setting));
val.def_string = str; val.def_string = str;
*(char**)target = val.def_string; *(char**)target = val.def_string;
break; break;
@ -353,7 +368,7 @@ static int clcpy(config_type type, void* target, const void* cl_arg)
break; break;
case CFG_STRING: case CFG_STRING:
asprintf(&str, "%s", (*(struct arg_str**)cl_arg)->sval[0]); c2s_asprintf(&str, "%s", (*(struct arg_str**)cl_arg)->sval[0]);
val.def_string = str; val.def_string = str;
*(char**)target = val.def_string; *(char**)target = val.def_string;
break; break;
@ -1760,7 +1775,7 @@ static int read_block_setval(void* target,
/* setting is present in cfg, look it up */ /* setting is present in cfg, look it up */
if (lookup_typed_ud(cfg, target, desc) != CONFIG_TRUE) { if (lookup_typed_ud(cfg, target, desc) != CONFIG_TRUE) {
TRACE_READ((" but wrong type (expected %s) ", type2str[desc->type])); TRACE_READ((" but wrong type (expected %s) ", type2str[desc->type]));
asprintf(errmsg, "Option \"%s\" wrong type, expected %s\n", c2s_asprintf(errmsg, "Option \"%s\" wrong type, expected %s\n",
desc->name, type2str[desc->type]); desc->name, type2str[desc->type]);
return 0; return 0;
} }
@ -1817,7 +1832,7 @@ static int read_block(config_setting_t* cfg, void* target, struct config_desc* d
set = read_block_setval(target, cfg, desc, errmsg); set = read_block_setval(target, cfg, desc, errmsg);
if (!set && desc->mandatory) { if (!set && desc->mandatory) {
asprintf(errmsg, "Mandatory option \"%s\" not found", desc->name); c2s_asprintf(errmsg, "Mandatory option \"%s\" not found", desc->name);
return 0; return 0;
} }
@ -1975,13 +1990,13 @@ static int regcompmatch_posix( regmatch_t* pmatch,
int errlen = regerror(res, &preg, NULL, 0); int errlen = regerror(res, &preg, NULL, 0);
regerr = malloc(errlen); regerr = malloc(errlen);
regerror(res, &preg, regerr, errlen); regerror(res, &preg, regerr, errlen);
asprintf(errmsg, "compiling pattern /%s/:%s", arg->regex, regerr); c2s_asprintf(errmsg, "compiling pattern /%s/:%s", arg->regex, regerr);
free(regerr); free(regerr);
return 0; return 0;
} }
res = regexec(&preg, arg_cl->sval[arg_index], MAX_MATCH, &pmatch[0], 0); res = regexec(&preg, arg_cl->sval[arg_index], MAX_MATCH, &pmatch[0], 0);
if (res) { if (res) {
asprintf(errmsg, "--%s %s: Illegal argument", c2s_asprintf(errmsg, "--%s %s: Illegal argument",
arg_cl->hdr.longopts, arg_cl->hdr.longopts,
arg->regex); arg->regex);
return 0; return 0;
@ -2007,7 +2022,7 @@ static int regcompmatch_pcre2( regmatch_t* pmatch,
pcre = pcre2_compile((PCRE2_SPTR8)arg->regex, PCRE2_ZERO_TERMINATED, 0, &error, &error_offset, NULL); pcre = pcre2_compile((PCRE2_SPTR8)arg->regex, PCRE2_ZERO_TERMINATED, 0, &error, &error_offset, NULL);
if (!pcre) { if (!pcre) {
pcre2_get_error_message(error, err_str, sizeof(err_str)); pcre2_get_error_message(error, err_str, sizeof(err_str));
asprintf(errmsg, "compiling pattern /%s/:%d: %s at offset %ld\n", c2s_asprintf(errmsg, "compiling pattern /%s/:%d: %s at offset %ld\n",
arg->regex, error, err_str, error_offset); arg->regex, error, err_str, error_offset);
return 0; return 0;
} }
@ -2017,7 +2032,7 @@ static int regcompmatch_pcre2( regmatch_t* pmatch,
0, 0, matches, NULL); 0, 0, matches, NULL);
if (res < 0) { if (res < 0) {
pcre2_get_error_message(res, err_str, sizeof(err_str)); pcre2_get_error_message(res, err_str, sizeof(err_str));
asprintf(errmsg, "matching %s =~ /%s/:%d: %s\n", c2s_asprintf(errmsg, "matching %s =~ /%s/:%d: %s\n",
arg_cl->sval[arg_index], arg->regex, res, err_str); arg_cl->sval[arg_index], arg->regex, res, err_str);
return 0; return 0;
} }
@ -2106,13 +2121,13 @@ static int c2s_parse_file(const char* filename, config_t* c, char**errmsg)
/* Read config file */ /* Read config file */
if (config_read_file(c, filename) == CONFIG_FALSE) { if (config_read_file(c, filename) == CONFIG_FALSE) {
if (config_error_line(c) != 0) { if (config_error_line(c) != 0) {
asprintf(errmsg, "%s:%d:%s", c2s_asprintf(errmsg, "%s:%d:%s",
filename, filename,
config_error_line(c), config_error_line(c),
config_error_text(c)); config_error_text(c));
return 0; return 0;
} }
asprintf(errmsg, "%s:%s", filename, config_error_text(c)); c2s_asprintf(errmsg, "%s:%s", filename, config_error_text(c));
return 0; return 0;
} }
return 1; return 1;
@ -2123,23 +2138,23 @@ static void scalar_to_string(char** strp, config_setting_t* s)
{ {
switch(config_setting_type(s)) { switch(config_setting_type(s)) {
case CONFIG_TYPE_INT: case CONFIG_TYPE_INT:
asprintf(strp, "%d\n", config_setting_get_int(s)); c2s_asprintf(strp, "%d\n", config_setting_get_int(s));
break; break;
case CONFIG_TYPE_BOOL: case CONFIG_TYPE_BOOL:
asprintf(strp, "%s\n", config_setting_get_bool(s) ? "[true]" : "[false]" ); c2s_asprintf(strp, "%s\n", config_setting_get_bool(s) ? "[true]" : "[false]" );
break; break;
case CONFIG_TYPE_INT64: case CONFIG_TYPE_INT64:
asprintf(strp, "%lld\n", config_setting_get_int64(s)); c2s_asprintf(strp, "%lld\n", config_setting_get_int64(s));
break; break;
case CONFIG_TYPE_FLOAT: case CONFIG_TYPE_FLOAT:
asprintf(strp, "%lf\n", config_setting_get_float(s)); c2s_asprintf(strp, "%lf\n", config_setting_get_float(s));
break; break;
case CONFIG_TYPE_STRING: case CONFIG_TYPE_STRING:
asprintf(strp, "%s\n", config_setting_get_string(s)); c2s_asprintf(strp, "%s\n", config_setting_get_string(s));
break; break;
default: /* This means a bug */ default: /* This means a bug */
@ -2167,9 +2182,9 @@ static int cfg_as_string(config_setting_t* parent, const char* path, char** strp
if(config_setting_is_list(parent) || if(config_setting_is_list(parent) ||
config_setting_is_array(parent)) { config_setting_is_array(parent)) {
asprintf(&subpath, "%s[%d]%s", path, config_setting_index(child), name); c2s_asprintf(&subpath, "%s[%d]%s", path, config_setting_index(child), name);
} else { } else {
asprintf(&subpath, "%s/%s", path, name); c2s_asprintf(&subpath, "%s/%s", path, name);
} }
if (config_setting_is_scalar(child)) { if (config_setting_is_scalar(child)) {
@ -2177,12 +2192,12 @@ static int cfg_as_string(config_setting_t* parent, const char* path, char** strp
/* Add value to the output string */ /* Add value to the output string */
if (*strp) { if (*strp) {
asprintf(&old, "%s", *strp); c2s_asprintf(&old, "%s", *strp);
free(*strp); free(*strp);
} else { } else {
asprintf(&old, "%s", ""); c2s_asprintf(&old, "%s", "");
} }
asprintf(strp, "%s%s:%s", old, subpath, value); c2s_asprintf(strp, "%s%s:%s", old, subpath, value);
free(value); free(value);
free(old); free(old);
@ -2254,6 +2269,14 @@ int sslhcfg_cl_parse(int argc, char* argv[], struct sslhcfg_item* cfg)
}; };
/* Set up failure handler in case asprintf() runs out of
* memory */
;
if (setjmp(c2s_asprintf_fail)) {
fprintf(stderr, "asprintf: probably out of memory\n");
return -1;
}
/* Parse command line */ /* Parse command line */
nerrors = arg_parse(argc, argv, argtable); nerrors = arg_parse(argc, argv, argtable);
if (nerrors) { if (nerrors) {

4
sslh-conf.h
View File

@ -1,8 +1,8 @@
/* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README) /* Generated by conf2struct (https://www.rutschle.net/tech/conf2struct/README)
* on Wed Jul 10 15:35:54 2024. * on Sun Sep 8 23:10:29 2024.
# conf2struct: generate libconf parsers that read to structs # conf2struct: generate libconf parsers that read to structs
# Copyright (C) 2018-2021 Yves Rutschle # Copyright (C) 2018-2024 Yves Rutschle
# All rights reserved. # All rights reserved.
# #
# Redistribution and use in source and binary forms, with or without # Redistribution and use in source and binary forms, with or without

2
version.h
View File

@ -1,5 +1,5 @@
#ifndef VERSION_H #ifndef VERSION_H
#define VERSION_H #define VERSION_H
#define VERSION "v2.1.1-49-ge7a9a37-dirty" #define VERSION "v2.1.1-50-g686d1f7-dirty"
#endif #endif