busybox: add patches for vi and modutils

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/busybox/0003-vi.patch

@@ -0,0 +1,54 @@
+Upstream http://busybox.net/downloads/fixes-1.23.0/busybox-1.23.0-vi.patch
+post-release hotfix patch for vi crash when called without a filename.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+
+--- busybox-1.23.0/editors/vi.c
++++ busybox-1.23.0-vi/editors/vi.c
+@@ -542,9 +542,6 @@ static void cookmode(void);	// return to
+ static int mysleep(int);
+ static int readit(void);	// read (maybe cursor) key from stdin
+ static int get_one_char(void);	// read 1 char from stdin
+-#if !ENABLE_FEATURE_VI_READONLY
+-#define file_insert(fn, p, update_ro_status) file_insert(fn, p)
+-#endif
+ // file_insert might reallocate text[]!
+ static int file_insert(const char *, char *, int);
+ static int file_write(char *, char *, char *);
+@@ -1325,7 +1322,7 @@ static void colon(char *buf)
+ 			q = next_line(q);
+ 		{ // dance around potentially-reallocated text[]
+ 			uintptr_t ofs = q - text;
+-			size = file_insert(fn, q, /*update_ro:*/ 0);
++			size = file_insert(fn, q, 0);
+ 			q = text + ofs;
+ 		}
+ 		if (size < 0)
+@@ -2905,7 +2902,7 @@ static char *get_input_line(const char *
+ }
+ 
+ // might reallocate text[]!
+-static int file_insert(const char *fn, char *p, int update_ro_status)
++static int file_insert(const char *fn, char *p, int initial)
+ {
+ 	int cnt = -1;
+ 	int fd, size;
+@@ -2918,7 +2915,8 @@ static int file_insert(const char *fn, c
+ 
+ 	fd = open(fn, O_RDONLY);
+ 	if (fd < 0) {
+-		status_line_bold_errno(fn);
++		if (!initial)
++			status_line_bold_errno(fn);
+ 		return cnt;
+ 	}
+ 
+@@ -2946,7 +2944,7 @@ static int file_insert(const char *fn, c
+ 	close(fd);
+ 
+ #if ENABLE_FEATURE_VI_READONLY
+-	if (update_ro_status
++	if (initial
+ 	 && ((access(fn, W_OK) < 0) ||
+ 		/* root will always have access()
+ 		 * so we check fileperms too */

package/busybox/0004-modprobe.patch

@@ -0,0 +1,208 @@
+Upstream http://busybox.net/downloads/fixes-1.23.0/busybox-1.23.0-modprobe.patch
+post-release hotfix patch for several modutils crashes/failures.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+
+--- busybox-1.23.0/modutils/depmod.c
++++ busybox-1.23.0-modprobe/modutils/depmod.c
+@@ -51,7 +51,11 @@ static int FAST_FUNC parse_module(const 
+ 
+ 	info->dnext = info->dprev = info;
+ 	info->name = xstrdup(fname + 2); /* skip "./" */
+-	info->modname = xstrdup(filename2modname(fname, modname));
++	info->modname = xstrdup(
++		filename2modname(
++			bb_get_last_path_component_nostrip(fname),
++			modname
++	));
+ 	for (ptr = image; ptr < image + len - 10; ptr++) {
+ 		if (strncmp(ptr, "depends=", 8) == 0) {
+ 			char *u;
+@@ -242,17 +246,18 @@ int depmod_main(int argc UNUSED_PARAM, c
+ 	if (!(option_mask32 & OPT_n))
+ 		xfreopen_write("modules.alias", stdout);
+ 	for (m = modules; m != NULL; m = m->next) {
++		char modname[MODULE_NAME_LEN];
+ 		const char *fname = bb_basename(m->name);
+-		int fnlen = strchrnul(fname, '.') - fname;
++		filename2modname(fname, modname);
+ 		while (m->aliases) {
+ 			/* Last word can well be m->modname instead,
+ 			 * but depmod from module-init-tools 3.4
+ 			 * uses module basename, i.e., no s/-/_/g.
+ 			 * (pathname and .ko.* are still stripped)
+ 			 * Mimicking that... */
+-			printf("alias %s %.*s\n",
++			printf("alias %s %s\n",
+ 				(char*)llist_pop(&m->aliases),
+-				fnlen, fname);
++				modname);
+ 		}
+ 	}
+ #endif
+@@ -260,12 +265,13 @@ int depmod_main(int argc UNUSED_PARAM, c
+ 	if (!(option_mask32 & OPT_n))
+ 		xfreopen_write("modules.symbols", stdout);
+ 	for (m = modules; m != NULL; m = m->next) {
++		char modname[MODULE_NAME_LEN];
+ 		const char *fname = bb_basename(m->name);
+-		int fnlen = strchrnul(fname, '.') - fname;
++		filename2modname(fname, modname);
+ 		while (m->symbols) {
+-			printf("alias symbol:%s %.*s\n",
++			printf("alias symbol:%s %s\n",
+ 				(char*)llist_pop(&m->symbols),
+-				fnlen, fname);
++				modname);
+ 		}
+ 	}
+ #endif
+--- busybox-1.23.0/modutils/modprobe.c
++++ busybox-1.23.0-modprobe/modutils/modprobe.c
+@@ -229,26 +229,20 @@ static ALWAYS_INLINE struct module_entry
+ {
+ 	return helper_get_module(module, 1);
+ }
+-static ALWAYS_INLINE struct module_entry *get_modentry(const char *module)
++/* So far this function always gets a module pathname, never an alias name.
++ * The crucial difference is that pathname needs dirname stripping,
++ * while alias name must NOT do it!
++ * Testcase where dirname stripping is likely to go wrong: "modprobe devname:snd/timer"
++ */
++static ALWAYS_INLINE struct module_entry *get_modentry(const char *pathname)
+ {
+-	return helper_get_module(module, 0);
++	return helper_get_module(bb_get_last_path_component_nostrip(pathname), 0);
+ }
+ 
+ static void add_probe(const char *name)
+ {
+ 	struct module_entry *m;
+ 
+-	/*
+-	 * get_or_add_modentry() strips path from name and works
+-	 * on remaining basename.
+-	 * This would make "rmmod dir/name" and "modprobe dir/name"
+-	 * to work like "rmmod name" and "modprobe name",
+-	 * which is wrong, and can be abused via implicit modprobing:
+-	 * "ifconfig /usbserial up" tries to modprobe netdev-/usbserial.
+-	 */
+-	if (strchr(name, '/'))
+-		bb_error_msg_and_die("malformed module name '%s'", name);
+-
+ 	m = get_or_add_modentry(name);
+ 	if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
+ 	 && (m->flags & MODULE_FLAG_LOADED)
+@@ -510,7 +504,7 @@ static void load_modules_dep(void)
+ 		colon = last_char_is(tokens[0], ':');
+ 		if (colon == NULL)
+ 			continue;
+-		*colon = 0;
++		*colon = '\0';
+ 
+ 		m = get_modentry(tokens[0]);
+ 		if (m == NULL)
+@@ -557,7 +551,6 @@ int modprobe_main(int argc UNUSED_PARAM,
+ 
+ 	if (opt & OPT_LIST_ONLY) {
+ 		int i;
+-		char name[MODULE_NAME_LEN];
+ 		char *colon, *tokens[2];
+ 		parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
+ 
+@@ -569,10 +562,14 @@ int modprobe_main(int argc UNUSED_PARAM,
+ 			if (!colon)
+ 				continue;
+ 			*colon = '\0';
+-			filename2modname(tokens[0], name);
+ 			if (!argv[0])
+ 				puts(tokens[0]);
+ 			else {
++				char name[MODULE_NAME_LEN];
++				filename2modname(
++					bb_get_last_path_component_nostrip(tokens[0]),
++					name
++				);
+ 				for (i = 0; argv[i]; i++) {
+ 					if (fnmatch(argv[i], name, 0) == 0) {
+ 						puts(tokens[0]);
+--- busybox-1.23.0/modutils/modprobe-small.c
++++ busybox-1.23.0-modprobe/modutils/modprobe-small.c
+@@ -149,9 +149,13 @@ static void replace(char *s, char what, 
+ static char *filename2modname(const char *filename, char *modname)
+ {
+ 	int i;
+-	char *from;
++	const char *from;
+ 
+-	from = bb_get_last_path_component_nostrip(filename);
++	// Disabled since otherwise "modprobe dir/name" would work
++	// as if it is "modprobe name". It is unclear why
++	// 'basenamization' was here in the first place.
++	//from = bb_get_last_path_component_nostrip(filename);
++	from = filename;
+ 	for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
+ 		modname[i] = (from[i] == '-') ? '_' : from[i];
+ 	modname[i] = '\0';
+@@ -631,6 +635,14 @@ static void process_module(char *name, c
+ 		infovec = find_alias(name);
+ 	}
+ 
++	if (!infovec) {
++		/* both dirscan and find_alias found nothing */
++		if (!is_rmmod && applet_name[0] != 'd') /* it wasn't rmmod or depmod */
++			bb_error_msg("module '%s' not found", name);
++//TODO: _and_die()? or should we continue (un)loading modules listed on cmdline?
++		goto ret;
++	}
++
+ 	/* There can be more than one module for the given alias. For example,
+ 	 * "pci:v00008086d00007010sv00000000sd00000000bc01sc01i80" matches
+ 	 * ata_piix because it has alias "pci:v00008086d00007010sv*sd*bc*sc*i*"
+@@ -646,7 +658,8 @@ static void process_module(char *name, c
+ 			int r;
+ 			char modname[MODULE_NAME_LEN];
+ 
+-			filename2modname(info->pathname, modname);
++			filename2modname(
++				bb_get_last_path_component_nostrip(info->pathname), modname);
+ 			r = delete_module(modname, O_NONBLOCK | O_EXCL);
+ 			dbg1_error_msg("delete_module('%s', O_NONBLOCK | O_EXCL):%d", modname, r);
+ 			if (r != 0) {
+@@ -669,14 +682,6 @@ static void process_module(char *name, c
+ 		 */
+ 	}
+ 
+-	if (!infovec) {
+-		/* both dirscan and find_alias found nothing */
+-		if (!is_rmmod && applet_name[0] != 'd') /* it wasn't rmmod or depmod */
+-			bb_error_msg("module '%s' not found", name);
+-//TODO: _and_die()? or should we continue (un)loading modules listed on cmdline?
+-		goto ret;
+-	}
+-
+ 	infoidx = 0;
+ 	while ((info = infovec[infoidx++]) != NULL) {
+ 		/* Iterate thru dependencies, trying to (un)load them */
+--- busybox-1.23.0/modutils/modutils.c
++++ busybox-1.23.0-modprobe/modutils/modutils.c
+@@ -48,13 +48,17 @@ int FAST_FUNC string_to_llist(char *stri
+ char* FAST_FUNC filename2modname(const char *filename, char *modname)
+ {
+ 	int i;
+-	char *from;
++	const char *from;
+ 
+ 	if (filename == NULL)
+ 		return NULL;
+ 	if (modname == NULL)
+ 		modname = xmalloc(MODULE_NAME_LEN);
+-	from = bb_get_last_path_component_nostrip(filename);
++	// Disabled since otherwise "modprobe dir/name" would work
++	// as if it is "modprobe name". It is unclear why
++	// 'basenamization' was here in the first place.
++	//from = bb_get_last_path_component_nostrip(filename);
++	from = filename;
+ 	for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
+ 		modname[i] = (from[i] == '-') ? '_' : from[i];
+ 	modname[i] = '\0';