Package: busybox Version: 1:1.19.2-1 Severity: grave Justification: Breaks system booting using initramfs-tools in non-trivial ways. Tags: patch X-Debbugs-CC: Debian kernel team <debian-kernel@lists.debian.org>
Hi
Initramfs images generated by initramfs-tools 0.99 after busybox got
upgraded to 1:1.19.2-1 fail to boot with the following error messages:
Loading, please wait...
/init: line 11: mount: not found
/init: line 12: mount: not found
/init: line 25: mount: not found
W: devtmpfs not available, falling back to tmpfs for /devtmpfs
/init: line 25: mount: not found
/init: line 27: mount: not found
/init: line 28: mount: not found
cat: can't open '/proc/cmdline': No such file or directory
cat: can't open '/proc/cmdline': No such file or directory
/scripts/init-top/udev: line 14: can't create /sys/kernel/uevent_helper:
nonexistent directory
Begin: Loading essential drivers ... done
Begin: Running /scripts/init-premount ... done
Begin: Mounting root file system .. Begin: Running /scripts/local-top .. [
0.742185] device-mapper: uevent: version 1.0.3
[ 0.746854] device-mapper: ioctl 4.21.0-ioctl (2011-07-06) initialised:
dm-de...@redhat.com
done.
Begin: Running /scripts/local-premount ... [ 0.765009] Btrfs loaded
done.
/init: line 5: mount: not found
Begin: Running /scripts/local-bottom ... done
done.
Begin: Running /scripts/init-bottom ... done
/init: line 239: mv: not found
/init: line 239: umount: not found
/init: line 242: mount: not found
/init: line 243: mount: not found
Target filesystem doesn't have requested /sbin/init.
/init: line 291: chvt: not found
No init found. Try passing init= bootarg.
BusyBox v1.19.2 (Debian 1:1.19.2-1) built-in shell (ash)
Enter 'help' for a list of built-in commands.
/bin/sh: can't access tty; job control turned off
(initramfs)
needed initramfs-tools hooks on this system:
$ dpkg -S /usr/share/initramfs-tools/hooks/*
initramfs-tools: /usr/share/initramfs-tools/hooks/busybox
dmsetup: /usr/share/initramfs-tools/hooks/dmsetup
initramfs-tools: /usr/share/initramfs-tools/hooks/keymap
initramfs-tools: /usr/share/initramfs-tools/hooks/klibc
lvm2: /usr/share/initramfs-tools/hooks/lvm2
initramfs-tools: /usr/share/initramfs-tools/hooks/thermal
udev: /usr/share/initramfs-tools/hooks/udev
Re-instating applets-fallback.patch in busybox 1:1.19.2-1 however fixes
this reproducable boot failure, quick'n'dirty rediff (tested on
amd64 && i386, using systems with mdadm, lvm2 or nothing special at
all) attached.
Regards
Stefan Lippers-Hollmann
-- System Information:
Debian Release: wheezy/sid
APT prefers unstable
APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.1-rc10-aptosid-amd64 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages busybox depends on:
ii libc6 2.13-21
busybox recommends no packages.
busybox suggests no packages.
-- no debconf information
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -7394,23 +7394,8 @@ static int builtinloc = -1; /* index
static void
-tryexec(IF_FEATURE_SH_STANDALONE(int applet_no,) char *cmd, char **argv, char **envp)
+tryexec(char *cmd, char **argv, char **envp)
{
-#if ENABLE_FEATURE_SH_STANDALONE
- if (applet_no >= 0) {
- if (APPLET_IS_NOEXEC(applet_no)) {
- clearenv();
- while (*envp)
- putenv(*envp++);
- run_applet_no_and_exit(applet_no, argv);
- }
- /* re-exec ourselves with the new arguments */
- execve(bb_busybox_exec_path, argv, envp);
- /* If they called chroot or otherwise made the binary no longer
- * executable, fall through */
- }
-#endif
-
repeat:
#ifdef SYSV
do {
@@ -7465,24 +7450,21 @@ shellexec(char **argv, const char *path,
int e;
char **envp;
int exerrno;
-#if ENABLE_FEATURE_SH_STANDALONE
- int applet_no = -1;
-#endif
clearredir(/*drop:*/ 1);
envp = listvars(VEXPORT, VUNSET, /*end:*/ NULL);
- if (strchr(argv[0], '/') != NULL
-#if ENABLE_FEATURE_SH_STANDALONE
- || (applet_no = find_applet_by_name(argv[0])) >= 0
-#endif
- ) {
- tryexec(IF_FEATURE_SH_STANDALONE(applet_no,) argv[0], argv, envp);
+ if (strchr(argv[0], '/') != NULL) {
+ tryexec(argv[0], argv, envp);
e = errno;
} else {
+#if ENABLE_FEATURE_SH_STANDALONE
+ bb_execv_applet(argv[0], argv, envp);
+#endif
+
e = ENOENT;
while ((cmdname = path_advance(&path, argv[0])) != NULL) {
if (--idx < 0 && pathopt == NULL) {
- tryexec(IF_FEATURE_SH_STANDALONE(-1,) cmdname, argv, envp);
+ tryexec(cmdname, argv, envp);
if (errno != ENOENT && errno != ENOTDIR)
e = errno;
}
--- a/libbb/execable.c
+++ b/libbb/execable.c
@@ -9,6 +9,9 @@
#include "libbb.h"
+#include <alloca.h>
+#include <stdarg.h>
+
/* check if path points to an executable file;
* return 1 if found;
* return 0 otherwise;
@@ -68,13 +71,60 @@ int FAST_FUNC exists_execable(const char
}
#if ENABLE_FEATURE_PREFER_APPLETS
+int FAST_FUNC bb_execv_applet(const char *name, char *const argv[], char *const envp[])
+{
+ const char **path = bb_busybox_exec_paths;
+
+ errno = ENOENT;
+
+ if (find_applet_by_name(name) < 0)
+ return -1;
+
+ for (; *path; ++path)
+ execve(*path, argv, envp);
+
+ return -1;
+}
+
/* just like the real execvp, but try to launch an applet named 'file' first */
int FAST_FUNC BB_EXECVP(const char *file, char *const argv[])
{
- if (find_applet_by_name(file) >= 0)
- execvp(bb_busybox_exec_path, argv);
+ int ret = bb_execv_applet(file, argv, environ);
+ if (errno != ENOENT)
+ return ret;
+
return execvp(file, argv);
}
+
+int FAST_FUNC bb_execlp(const char *file, const char *arg, ...)
+{
+#define INITIAL_ARGV_MAX 16
+ size_t argv_max = INITIAL_ARGV_MAX;
+ const char **argv = malloc(argv_max * sizeof (const char *));
+ va_list args;
+ unsigned int i = 0;
+ int ret;
+
+ va_start (args, arg);
+ while (argv[i++] != NULL) {
+ if (i == argv_max) {
+ const char **nptr;
+ argv_max *= 2;
+ nptr = realloc (argv, argv_max * sizeof (const char *));
+ if (nptr == NULL)
+ return -1;
+ argv = nptr;
+ }
+
+ argv[i] = va_arg (args, const char *);
+ }
+ va_end (args);
+
+ ret = bb_execvp(file, (char *const *)argv);
+ free(argv);
+
+ return ret;
+}
#endif
int FAST_FUNC BB_EXECVP_or_die(char **argv)
--- a/libbb/messages.c
+++ b/libbb/messages.c
@@ -36,6 +36,15 @@ const char bb_msg_standard_output[] ALIG
const char bb_hexdigits_upcase[] ALIGN1 = "0123456789ABCDEF";
const char bb_busybox_exec_path[] ALIGN1 = CONFIG_BUSYBOX_EXEC_PATH;
+const char *bb_busybox_exec_paths[] ALIGN1 = {
+#ifdef __linux__
+ "/proc/self/exe",
+#endif
+#ifdef CONFIG_BUSYBOX_EXEC_PATH
+ CONFIG_BUSYBOX_EXEC_PATH,
+#endif
+ NULL
+};
const char bb_default_login_shell[] ALIGN1 = LIBBB_DEFAULT_LOGIN_SHELL;
/* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
* but I want to save a few bytes here. Check libbb.h before changing! */
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -896,13 +896,11 @@ int exists_execable(const char *filename
* but it may exec busybox and call applet instead of searching PATH.
*/
#if ENABLE_FEATURE_PREFER_APPLETS
-int BB_EXECVP(const char *file, char *const argv[]) FAST_FUNC;
-#define BB_EXECLP(prog,cmd,...) \
- do { \
- if (find_applet_by_name(prog) >= 0) \
- execlp(bb_busybox_exec_path, cmd, __VA_ARGS__); \
- execlp(prog, cmd, __VA_ARGS__); \
- } while (0)
+int bb_execv_applet(const char *name, char *const argv[], char *const envp[]) FAST_FUNC;
+int bb_execvp(const char *file, char *const argv[]) FAST_FUNC;
+int bb_execlp(const char *file, const char *arg, ...) FAST_FUNC;
+#define BB_EXECVP(prog,cmd) bb_execvp(prog,cmd)
+#define BB_EXECLP(prog,cmd,...) bb_execlp(prog,cmd, __VA_ARGS__)
#else
#define BB_EXECVP(prog,cmd) execvp(prog,cmd)
#define BB_EXECLP(prog,cmd,...) execlp(prog,cmd,__VA_ARGS__)
@@ -1683,6 +1681,7 @@ extern const char bb_path_wtmp_file[];
#define bb_dev_null "/dev/null"
extern const char bb_busybox_exec_path[];
+extern const char *bb_busybox_exec_paths[];
/* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
* but I want to save a few bytes here */
extern const char bb_PATH_root_path[]; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */
--- a/Config.in
+++ b/Config.in
@@ -431,13 +431,10 @@ config FEATURE_PREFER_APPLETS
config BUSYBOX_EXEC_PATH
string "Path to BusyBox executable"
- default "/proc/self/exe"
+ default "/bin/busybox"
help
When Busybox applets need to run other busybox applets, BusyBox
- sometimes needs to exec() itself. When the /proc filesystem is
- mounted, /proc/self/exe always points to the currently running
- executable. If you haven't got /proc, set this to wherever you
- want to run BusyBox from.
+ sometimes needs to exec() itself.
# These are auto-selected by other options
--- a/coreutils/chroot.c
+++ b/coreutils/chroot.c
@@ -41,5 +41,7 @@ int chroot_main(int argc UNUSED_PARAM, c
/*argv[2] = NULL; - already is */
}
- BB_EXECVP_or_die(argv);
+ execvp(argv[0], argv);
+ xfunc_error_retval = (errno == ENOENT) ? 127 : 126;
+ bb_perror_msg_and_die("can't execute '%s'", argv[0]);
}
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