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openwrtv4/package/busybox/patches/470-insmod_search.patch
Felix Fietkau fc5a739fbe fix insmod crash when the module is not found 
SVN-Revision: 9194
2007-10-08 20:31:17 +00:00

499 lines
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Index: busybox-1.7.2/modutils/insmod.c
===================================================================
--- busybox-1.7.2.orig/modutils/insmod.c 2007-10-08 22:22:17.132454529 +0200
+++ busybox-1.7.2/modutils/insmod.c 2007-10-08 22:29:04.267655851 +0200
@@ -61,19 +61,110 @@
#include "libbb.h"
#include <libgen.h>
#include <sys/utsname.h>
+#if ENABLE_FEATURE_2_6_MODULES
+#include <sys/mman.h>
+#include <asm/unistd.h>
+#include <sys/syscall.h>
+#endif
#if !ENABLE_FEATURE_2_4_MODULES && !ENABLE_FEATURE_2_6_MODULES
#undef ENABLE_FEATURE_2_4_MODULES
#define ENABLE_FEATURE_2_4_MODULES 1
#endif
-#if !ENABLE_FEATURE_2_4_MODULES
-#define insmod_ng_main insmod_main
+#if ENABLE_FEATURE_2_4_MODULES
+int insmod_main_24(int argc, char **argv);
#endif
-
#if ENABLE_FEATURE_2_6_MODULES
-extern int insmod_ng_main( int argc, char **argv);
+int insmod_main_26(int argc, char **argv);
#endif
+int insmod_main(int argc, char **argv);
+
+static char *g_filename = NULL;
+#define _PATH_MODULES "/lib/modules"
+
+static int check_module_name_match(const char *filename, struct stat *statbuf,
+ void *userdata, int depth)
+{
+ char *fullname = (char *) userdata;
+
+ if (fullname[0] == '\0')
+ return FALSE;
+ else {
+ char *tmp, *tmp1 = xstrdup(filename);
+ tmp = bb_get_last_path_component(tmp1);
+ if (strcmp(tmp, fullname) == 0) {
+ free(tmp1);
+ /* Stop searching if we find a match */
+ g_filename = xstrdup(filename);
+ return FALSE;
+ }
+ free(tmp1);
+ }
+ return TRUE;
+}
+
+static int find_module(char *filename)
+{
+ char *module_dir, real_module_dir[FILENAME_MAX];
+ int len, slen, ret = ENOENT, k_version;
+ struct utsname myuname;
+ const char *suffix;
+ struct stat st;
+
+ /* check the kernel version */
+ if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
+ return EINVAL;
+
+ k_version = myuname.release[2] - '0';
+#if ENABLE_FEATURE_2_4_MODULES
+ if (k_version <= 4)
+ suffix = ".o";
+ else
+#endif
+ suffix = ".ko";
+
+ len = strlen(filename);
+ slen = strlen(suffix);
+
+ /* check for suffix and absolute path first */
+ if ((len < slen + 2) || (strcmp(filename + len - slen, suffix) != 0)) {
+ filename = xasprintf("%s%s", filename, suffix);
+ } else {
+ filename = strdup(filename);
+ if ((stat(filename, &st) == 0) && S_ISREG(st.st_mode))
+ return 0;
+ }
+
+ /* next: scan /lib/modules/<release> */
+ /* Jump through hoops in case /lib/modules/`uname -r`
+ * is a symlink. We do not want recursive_action to
+ * follow symlinks, but we do want to follow the
+ * /lib/modules/`uname -r` dir, So resolve it ourselves
+ * if it is a link... */
+ module_dir = concat_path_file(_PATH_MODULES, myuname.release);
+ if (realpath(module_dir, real_module_dir) != NULL) {
+ free(module_dir);
+ module_dir = real_module_dir;
+ }
+
+ recursive_action(module_dir, ACTION_RECURSE,
+ check_module_name_match, 0, filename, 0);
+
+ /* Check if we have a complete path */
+ if (g_filename == NULL)
+ goto done;
+
+ if ((stat(g_filename, &st) == 0) && S_ISREG(st.st_mode))
+ ret = 0;
+ else
+ free(g_filename);
+
+done:
+ free(filename);
+
+ return ret;
+}
#if ENABLE_FEATURE_2_4_MODULES
@@ -677,7 +768,6 @@
#endif
-#define _PATH_MODULES "/lib/modules"
enum { STRVERSIONLEN = 64 };
/*======================================================================*/
@@ -790,37 +880,6 @@
static int n_ext_modules_used;
extern int delete_module(const char *);
-static char *m_filename;
-static char *m_fullName;
-
-
-/*======================================================================*/
-
-
-static int check_module_name_match(const char *filename, struct stat *statbuf,
- void *userdata, int depth)
-{
- char *fullname = (char *) userdata;
-
- if (fullname[0] == '\0')
- return FALSE;
- else {
- char *tmp, *tmp1 = xstrdup(filename);
- tmp = bb_get_last_path_component(tmp1);
- if (strcmp(tmp, fullname) == 0) {
- free(tmp1);
- /* Stop searching if we find a match */
- m_filename = xstrdup(filename);
- return FALSE;
- }
- free(tmp1);
- }
- return TRUE;
-}
-
-
-/*======================================================================*/
-
static struct obj_file *arch_new_file(void)
{
struct arch_file *f;
@@ -3952,145 +4011,57 @@
void print_load_map(struct obj_file *f);
#endif
-int insmod_main( int argc, char **argv);
-int insmod_main( int argc, char **argv)
+int insmod_main_24( int argc, char **argv)
{
char *opt_o, *arg1;
- int len;
int k_crcs;
- char *tmp, *tmp1;
unsigned long m_size;
ElfW(Addr) m_addr;
struct obj_file *f;
- struct stat st;
- char *m_name = 0;
- int exit_status = EXIT_FAILURE;
+ char *tmp = NULL, *m_name = NULL;
+ int ret = EINVAL;
int m_has_modinfo;
#if ENABLE_FEATURE_INSMOD_VERSION_CHECKING
struct utsname uts_info;
char m_strversion[STRVERSIONLEN];
int m_version, m_crcs;
#endif
-#if ENABLE_FEATURE_CLEAN_UP
- FILE *fp = 0;
-#else
- FILE *fp;
-#endif
- int k_version = 0;
+ FILE *fp = NULL;
+ int k_version;
struct utsname myuname;
+ /* check the kernel version */
+ if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
+ return EINVAL;
+
+ k_version = myuname.release[2] - '0';
+ if (k_version > 4)
+ return ENOTSUP;
+
/* Parse any options */
getopt32(argv, OPTION_STR, &opt_o);
arg1 = argv[optind];
if (option_mask32 & OPT_o) { // -o /* name the output module */
- free(m_name);
m_name = xstrdup(opt_o);
}
- if (arg1 == NULL) {
+ if (arg1 == NULL)
bb_show_usage();
- }
-
- /* Grab the module name */
- tmp1 = xstrdup(arg1);
- tmp = basename(tmp1);
- len = strlen(tmp);
-
- if (uname(&myuname) == 0) {
- if (myuname.release[0] == '2') {
- k_version = myuname.release[2] - '0';
- }
- }
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4 && len > 3 && tmp[len - 3] == '.'
- && tmp[len - 2] == 'k' && tmp[len - 1] == 'o'
- ) {
- len -= 3;
- tmp[len] = '\0';
- } else
-#endif
- if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o') {
- len -= 2;
- tmp[len] = '\0';
- }
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4)
- m_fullName = xasprintf("%s.ko", tmp);
- else
-#endif
- m_fullName = xasprintf("%s.o", tmp);
+ ret = find_module(arg1);
+ if (ret)
+ goto out;
if (!m_name) {
- m_name = tmp;
- } else {
- free(tmp1);
- tmp1 = 0; /* flag for free(m_name) before exit() */
+ tmp = xstrdup(arg1);
+ m_name = basename(tmp);
}
- /* Get a filedesc for the module. Check we we have a complete path */
- if (stat(arg1, &st) < 0 || !S_ISREG(st.st_mode)
- || (fp = fopen(arg1, "r")) == NULL
- ) {
- /* Hmm. Could not open it. First search under /lib/modules/`uname -r`,
- * but do not error out yet if we fail to find it... */
- if (k_version) { /* uname succeedd */
- char *module_dir;
- char *tmdn;
- char real_module_dir[FILENAME_MAX];
-
- tmdn = concat_path_file(_PATH_MODULES, myuname.release);
- /* Jump through hoops in case /lib/modules/`uname -r`
- * is a symlink. We do not want recursive_action to
- * follow symlinks, but we do want to follow the
- * /lib/modules/`uname -r` dir, So resolve it ourselves
- * if it is a link... */
- if (realpath(tmdn, real_module_dir) == NULL)
- module_dir = tmdn;
- else
- module_dir = real_module_dir;
- recursive_action(module_dir, ACTION_RECURSE,
- check_module_name_match, 0, m_fullName, 0);
- free(tmdn);
- }
-
- /* Check if we have found anything yet */
- if (m_filename == 0 || ((fp = fopen(m_filename, "r")) == NULL)) {
- char module_dir[FILENAME_MAX];
-
- free(m_filename);
- m_filename = 0;
- if (realpath (_PATH_MODULES, module_dir) == NULL)
- strcpy(module_dir, _PATH_MODULES);
- /* No module found under /lib/modules/`uname -r`, this
- * time cast the net a bit wider. Search /lib/modules/ */
- if (!recursive_action(module_dir, ACTION_RECURSE,
- check_module_name_match, 0, m_fullName, 0)
- ) {
- if (m_filename == 0
- || ((fp = fopen(m_filename, "r")) == NULL)
- ) {
- bb_error_msg("%s: no module by that name found", m_fullName);
- goto out;
- }
- } else
- bb_error_msg_and_die("%s: no module by that name found", m_fullName);
- }
- } else
- m_filename = xstrdup(arg1);
-
- if (flag_verbose)
- printf("Using %s\n", m_filename);
-
-#if ENABLE_FEATURE_2_6_MODULES
- if (k_version > 4) {
- argv[optind] = m_filename;
- optind--;
- return insmod_ng_main(argc - optind, argv + optind);
+ fp = fopen(g_filename, "r");
+ if (!fp) {
+ ret = errno;
+ goto out;
}
-#endif
f = obj_load(fp, LOADBITS);
if (f == NULL)
@@ -4120,7 +4091,7 @@
"\t%s was compiled for kernel version %s\n"
"\twhile this kernel is version %s",
flag_force_load ? "warning: " : "",
- m_filename, m_strversion, uts_info.release);
+ g_filename, m_strversion, uts_info.release);
if (!flag_force_load)
goto out;
}
@@ -4173,7 +4144,7 @@
hide_special_symbols(f);
#if ENABLE_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
- add_ksymoops_symbols(f, m_filename, m_name);
+ add_ksymoops_symbols(f, g_filename, m_name);
#endif /* FEATURE_INSMOD_KSYMOOPS_SYMBOLS */
new_create_module_ksymtab(f);
@@ -4220,30 +4191,22 @@
if (flag_print_load_map)
print_load_map(f);
- exit_status = EXIT_SUCCESS;
-
+ ret = 0;
out:
#if ENABLE_FEATURE_CLEAN_UP
if (fp)
fclose(fp);
- free(tmp1);
- if (!tmp1)
+ if (tmp)
+ free(tmp);
+ else if (m_name)
free(m_name);
- free(m_filename);
+ free(g_filename);
#endif
- return exit_status;
+ return ret;
}
-
-
#endif
-
#if ENABLE_FEATURE_2_6_MODULES
-
-#include <sys/mman.h>
-#include <asm/unistd.h>
-#include <sys/syscall.h>
-
/* We use error numbers in a loose translation... */
static const char *moderror(int err)
{
@@ -4261,19 +4224,32 @@
}
}
-int insmod_ng_main(int argc, char **argv);
-int insmod_ng_main(int argc, char **argv)
+int insmod_main_26(int argc, char **argv)
{
- long ret;
- size_t len;
+ char *filename, *options;
+ struct utsname myuname;
+ int k_version;
int optlen;
+ size_t len;
void *map;
- char *filename, *options;
+ long ret = 0;
+
+ /* check the kernel version */
+ if ((uname(&myuname) != 0) || (myuname.release[0] != '2'))
+ return EINVAL;
+
+ k_version = myuname.release[2] - '0';
+ if (k_version <= 4)
+ return ENOTSUP;
filename = *++argv;
if (!filename)
bb_show_usage();
+ ret = find_module(filename);
+ if (ret || (g_filename == NULL))
+ goto done;
+
/* Rest is options */
options = xzalloc(1);
optlen = 0;
@@ -4283,36 +4259,47 @@
optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
}
-#if 0
- /* Any special reason why mmap? It isn't performace critical... */
- int fd;
- struct stat st;
- unsigned long len;
- fd = xopen(filename, O_RDONLY);
- fstat(fd, &st);
- len = st.st_size;
- map = mmap(NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
- if (map == MAP_FAILED) {
- bb_perror_msg_and_die("cannot mmap '%s'", filename);
- }
-
- /* map == NULL on Blackfin, probably on other MMU-less systems too. Workaround. */
- if (map == NULL) {
- map = xmalloc(len);
- xread(fd, map, len);
- }
-#else
len = MAXINT(ssize_t);
- map = xmalloc_open_read_close(filename, &len);
-#endif
-
+ map = xmalloc_open_read_close(g_filename, &len);
ret = syscall(__NR_init_module, map, len, options);
if (ret != 0) {
bb_perror_msg_and_die("cannot insert '%s': %s (%li)",
- filename, moderror(errno), ret);
+ g_filename, moderror(errno), ret);
}
+done:
+ if (g_filename && (g_filename != filename))
+ free(g_filename);
- return 0;
+ return ret;
}
#endif
+
+int insmod_main(int argc, char **argv)
+{
+ int ret;
+
+ g_filename = NULL;
+#if ENABLE_FEATURE_2_6_MODULES
+ ret = insmod_main_26(argc, argv);
+ if (ret != ENOTSUP)
+ goto done;
+#endif
+
+#if ENABLE_FEATURE_2_4_MODULES
+ ret = insmod_main_24(argc, argv);
+ if (ret != ENOTSUP)
+ goto done;
+#endif
+
+ fprintf(stderr, "Error: Kernel version not supported\n");
+ return 1;
+
+done:
+ if (ret) {
+ errno = ret;
+ bb_perror_msg("Loading module failed");
+ return ret;
+ } else
+ return 0;
+}
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