Eliminate ofpath limits and possible overflows.
* util/ieee1275/ofpath.c (grub_util_info) [STANDALONE]: New function. (OF_PATH_MAX): Removed. (MAX_DISK_CAT): New const. (find_obppath): Use allocated rather than preallocated buffer. Return result. Argument of_path removed. All users updated. Add missing fdstat. (xrealpath): New function. (block_device_get_sysfs_path_and_link): Remove sysfs argument. Allocate rather than use preallocated buffer. All users updated. (__of_path_common): Use allocated rather than preallocatecd buffer. Return result. Argument of_path removed. All users updated. (vendor_is_ATA): Read only needed part form the file. (check_sas): Allocate depending on contents rather than fixed. (main) [STANDALONE]: Handle NULL result.
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
f990cbf90e
commit
5f47782c29
19
ChangeLog
19
ChangeLog
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@ -1,3 +1,22 @@
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2012-01-29 Vladimir Serbinenko <phcoder@gmail.com>
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Eliminate ofpath limits and possible overflows.
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* util/ieee1275/ofpath.c (grub_util_info) [STANDALONE]: New function.
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(OF_PATH_MAX): Removed.
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(MAX_DISK_CAT): New const.
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(find_obppath): Use allocated rather than preallocated buffer.
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Return result. Argument of_path removed. All users updated.
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Add missing fdstat.
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(xrealpath): New function.
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(block_device_get_sysfs_path_and_link): Remove sysfs argument.
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Allocate rather than use preallocated buffer. All users updated.
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(__of_path_common): Use allocated rather than preallocatecd buffer.
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Return result. Argument of_path removed. All users updated.
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(vendor_is_ATA): Read only needed part form the file.
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(check_sas): Allocate depending on contents rather than fixed.
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(main) [STANDALONE]: Handle NULL result.
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2012-01-29 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/normal/completion.c (iterate_dev): Close the disk.
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@ -54,6 +54,18 @@ grub_util_error (const char *fmt, ...)
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exit (1);
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}
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void
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grub_util_info (const char *fmt, ...)
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{
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va_list ap;
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fprintf (stderr, "ofpath: info: ");
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va_start (ap, fmt);
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vfprintf (stderr, fmt, ap);
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va_end (ap);
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fputc ('\n', stderr);
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}
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#define _(x) x
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#endif
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@ -83,28 +95,31 @@ trim_newline (char *path)
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*end-- = '\0';
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}
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#define OF_PATH_MAX 256
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#define MAX_DISK_CAT 64
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static int
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find_obppath (char *of_path, const char *sysfs_path_orig)
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static char *
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find_obppath (const char *sysfs_path_orig)
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{
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char *sysfs_path, *path;
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size_t path_size = strlen (sysfs_path_orig) + sizeof ("/obppath");
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sysfs_path = xmalloc (PATH_MAX);
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path = xmalloc (PATH_MAX);
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sysfs_path = xstrdup (sysfs_path_orig);
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path = xmalloc (path_size);
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strcpy(sysfs_path, sysfs_path_orig);
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while (1)
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{
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int fd;
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char *of_path;
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struct stat st;
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size_t size;
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snprintf(path, PATH_MAX, "%s/obppath", sysfs_path);
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snprintf(path, path_size, "%s/obppath", sysfs_path);
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#if 0
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printf("Trying %s\n", path);
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#endif
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fd = open(path, O_RDONLY);
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if (fd < 0)
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if (fd < 0 || fstat (fd, &st) < 0)
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{
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kill_trailing_dir(sysfs_path);
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if (!strcmp(sysfs_path, "/sys"))
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@ -114,40 +129,61 @@ find_obppath (char *of_path, const char *sysfs_path_orig)
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sysfs_path_orig);
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free (path);
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free (sysfs_path);
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return 1;
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return NULL;
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}
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continue;
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}
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memset(of_path, 0, OF_PATH_MAX);
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read(fd, of_path, OF_PATH_MAX);
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size = st.st_size;
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of_path = xmalloc (size + MAX_DISK_CAT + 1);
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memset(of_path, 0, size + MAX_DISK_CAT + 1);
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read(fd, of_path, size);
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close(fd);
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trim_newline(of_path);
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break;
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free (path);
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free (sysfs_path);
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return of_path;
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}
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free (path);
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free (sysfs_path);
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return 0;
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}
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static void
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block_device_get_sysfs_path_and_link(const char *devicenode,
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char *sysfs_path, int sysfs_path_len)
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static char *
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xrealpath (const char *in)
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{
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char *rpath = xmalloc (PATH_MAX);
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char *out;
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#ifdef PATH_MAX
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out = xmalloc (PATH_MAX);
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out = realpath (in, out);
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#else
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out = realpath (in, NULL);
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#endif
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if (!out)
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grub_util_error (_("cannot get the real path of `%s'"), in);
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return out;
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}
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snprintf(sysfs_path, sysfs_path_len, "/sys/block/%s", devicenode);
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static char *
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block_device_get_sysfs_path_and_link(const char *devicenode)
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{
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char *rpath;
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char *rpath2;
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char *ret;
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size_t tmp_size = strlen (devicenode) + sizeof ("/sys/block/");
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char *tmp = xmalloc (tmp_size);
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if (!realpath (sysfs_path, rpath))
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grub_util_error (_("cannot get the real path of `%s'"), sysfs_path);
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memcpy (tmp, "/sys/block/", sizeof ("/sys/block/"));
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strcat (tmp, devicenode);
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strcat(rpath, "/device");
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rpath = xrealpath (tmp);
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rpath2 = xmalloc (strlen (rpath) + sizeof ("/device"));
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strcpy (rpath2, rpath);
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strcat (rpath2, "/device");
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if (!realpath (rpath, sysfs_path))
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grub_util_error (_("cannot get the real path of `%s'"), rpath);
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ret = xrealpath (rpath2);
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free (tmp);
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free (rpath);
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free (rpath2);
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return ret;
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}
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static const char *
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@ -166,30 +202,31 @@ trailing_digits (const char *p)
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return end + 1;
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}
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static int
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__of_path_common(char *of_path, char *sysfs_path,
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static char *
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__of_path_common(char *sysfs_path,
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const char *device, int devno)
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{
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const char *digit_string;
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char disk[64];
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char disk[MAX_DISK_CAT];
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char *of_path = find_obppath(sysfs_path);
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if (find_obppath(of_path, sysfs_path))
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return 1;
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if (!of_path)
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return NULL;
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digit_string = trailing_digits (device);
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if (*digit_string == '\0')
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{
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sprintf(disk, "/disk@%d", devno);
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snprintf(disk, sizeof (disk), "/disk@%d", devno);
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}
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else
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{
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int part;
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sscanf(digit_string, "%d", &part);
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sprintf(disk, "/disk@%d:%c", devno, 'a' + (part - 1));
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snprintf(disk, sizeof (disk), "/disk@%d:%c", devno, 'a' + (part - 1));
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}
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strcat(of_path, disk);
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return 0;
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return of_path;
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}
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static char *
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@ -207,45 +244,39 @@ get_basename(char *p)
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return ret;
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}
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static int
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of_path_of_vdisk(char *of_path,
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const char *devname __attribute__((unused)),
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static char *
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of_path_of_vdisk(const char *devname __attribute__((unused)),
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const char *device,
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const char *devnode __attribute__((unused)),
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const char *devicenode)
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{
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char *sysfs_path, *p;
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int devno, junk;
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int ret;
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char *ret;
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sysfs_path = xmalloc (PATH_MAX);
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block_device_get_sysfs_path_and_link(devicenode,
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sysfs_path, PATH_MAX);
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sysfs_path = block_device_get_sysfs_path_and_link(devicenode);
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p = get_basename (sysfs_path);
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sscanf(p, "vdc-port-%d-%d", &devno, &junk);
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ret = __of_path_common(of_path, sysfs_path, device, devno);
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ret = __of_path_common (sysfs_path, device, devno);
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free (sysfs_path);
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return ret;
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}
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static int
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of_path_of_ide(char *of_path,
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const char *devname __attribute__((unused)), const char *device,
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static char *
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of_path_of_ide(const char *devname __attribute__((unused)), const char *device,
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const char *devnode __attribute__((unused)),
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const char *devicenode)
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{
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char *sysfs_path, *p;
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int chan, devno;
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int ret;
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char *ret;
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sysfs_path = xmalloc (PATH_MAX);
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block_device_get_sysfs_path_and_link(devicenode,
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sysfs_path, PATH_MAX);
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sysfs_path = block_device_get_sysfs_path_and_link(devicenode);
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p = get_basename (sysfs_path);
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sscanf(p, "%d.%d", &chan, &devno);
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ret = __of_path_common(of_path, sysfs_path, device, 2 * chan + devno);
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ret = __of_path_common(sysfs_path, device, 2 * chan + devno);
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free (sysfs_path);
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return ret;
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@ -255,30 +286,28 @@ static int
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vendor_is_ATA(const char *path)
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{
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int fd, err;
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char *buf;
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char *bufname;
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char bufcont[3];
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size_t path_size;
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buf = xmalloc (PATH_MAX);
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path_size = strlen (path) + sizeof ("/vendor");
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snprintf(buf, PATH_MAX, "%s/vendor", path);
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fd = open(buf, O_RDONLY);
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bufname = xmalloc (path_size);
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snprintf(bufname, path_size, "%s/vendor", path);
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fd = open(bufname, O_RDONLY);
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if (fd < 0)
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grub_util_error (_("cannot open 'vendor' node of `%s'"), path);
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memset(buf, 0, PATH_MAX);
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err = read(fd, buf, PATH_MAX);
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memset(bufcont, 0, sizeof (bufcont));
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err = read(fd, bufcont, sizeof (bufcont));
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if (err < 0)
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grub_util_error (_("cannot read 'vendor' node of `%s'"), path);
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close(fd);
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free (bufname);
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if (!strncmp(buf, "ATA", 3))
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{
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free (buf);
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return 1;
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}
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free (buf);
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return 0;
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return (memcmp(bufcont, "ATA", 3) == 0);
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}
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static void
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@ -288,6 +317,7 @@ check_sas (char *sysfs_path, int *tgt)
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char *p, *q, *path;
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char phy[16];
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int fd;
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size_t path_size;
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if (!ed)
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return;
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@ -301,8 +331,10 @@ check_sas (char *sysfs_path, int *tgt)
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q++;
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*q = '\0';
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path = xmalloc (PATH_MAX);
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sprintf (path, "%s/sas_device:%s/phy_identifier", p, ed);
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path_size = (strlen (p) + strlen (ed)
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+ sizeof ("%s/sas_device:%s/phy_identifier"));
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path = xmalloc (path_size);
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snprintf (path, path_size, "%s/sas_device:%s/phy_identifier", p, ed);
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fd = open(path, O_RDONLY);
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if (fd < 0)
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@ -318,36 +350,32 @@ check_sas (char *sysfs_path, int *tgt)
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close (fd);
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}
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static int
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of_path_of_scsi(char *of_path,
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const char *devname __attribute__((unused)), const char *device,
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static char *
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of_path_of_scsi(const char *devname __attribute__((unused)), const char *device,
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const char *devnode __attribute__((unused)),
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const char *devicenode)
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{
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const char *p, *digit_string, *disk_name;
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int host, bus, tgt, lun;
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char *sysfs_path, disk[64];
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int ret;
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char *sysfs_path, disk[MAX_DISK_CAT - sizeof ("/fp@0,0")];
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char *of_path;
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sysfs_path = xmalloc (PATH_MAX);
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block_device_get_sysfs_path_and_link(devicenode,
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sysfs_path, PATH_MAX);
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sysfs_path = block_device_get_sysfs_path_and_link(devicenode);
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p = get_basename (sysfs_path);
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sscanf(p, "%d:%d:%d:%d", &host, &bus, &tgt, &lun);
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check_sas (sysfs_path, &tgt);
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if (vendor_is_ATA(sysfs_path))
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{
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ret = __of_path_common(of_path, sysfs_path, device, tgt);
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of_path = __of_path_common(sysfs_path, device, tgt);
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free (sysfs_path);
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return ret;
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return of_path;
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}
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ret = find_obppath(of_path, sysfs_path);
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of_path = find_obppath(sysfs_path);
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free (sysfs_path);
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if (ret)
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return 1;
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if (!of_path)
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return NULL;
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if (strstr (of_path, "qlc"))
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strcat (of_path, "/fp@0,0");
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@ -360,17 +388,18 @@ of_path_of_scsi(char *of_path,
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digit_string = trailing_digits (device);
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if (*digit_string == '\0')
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{
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sprintf(disk, "/%s@%x,%d", disk_name, tgt, lun);
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snprintf(disk, sizeof (disk), "/%s@%x,%d", disk_name, tgt, lun);
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}
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else
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{
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int part;
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sscanf(digit_string, "%d", &part);
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sprintf(disk, "/%s@%x,%d:%c", disk_name, tgt, lun, 'a' + (part - 1));
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snprintf(disk, sizeof (disk),
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"/%s@%x,%d:%c", disk_name, tgt, lun, 'a' + (part - 1));
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}
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strcat(of_path, disk);
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return 0;
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return of_path;
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}
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static char *
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@ -394,35 +423,26 @@ char *
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grub_util_devname_to_ofpath (const char *devname)
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{
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char *name_buf, *device, *devnode, *devicenode, *ofpath;
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int ret;
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name_buf = xmalloc (PATH_MAX);
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name_buf = realpath (devname, name_buf);
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if (! name_buf)
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grub_util_error (_("cannot get the real path of `%s'"), devname);
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name_buf = xrealpath (devname);
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device = get_basename (name_buf);
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devnode = strip_trailing_digits (name_buf);
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devicenode = strip_trailing_digits (device);
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ofpath = xmalloc (OF_PATH_MAX);
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if (device[0] == 'h' && device[1] == 'd')
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ret = of_path_of_ide(ofpath, name_buf, device, devnode, devicenode);
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ofpath = of_path_of_ide(name_buf, device, devnode, devicenode);
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else if (device[0] == 's'
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&& (device[1] == 'd' || device[1] == 'r'))
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ret = of_path_of_scsi(ofpath, name_buf, device, devnode, devicenode);
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ofpath = of_path_of_scsi(name_buf, device, devnode, devicenode);
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else if (device[0] == 'v' && device[1] == 'd' && device[2] == 'i'
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&& device[3] == 's' && device[4] == 'k')
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ret = of_path_of_vdisk(ofpath, name_buf, device, devnode, devicenode);
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ofpath = of_path_of_vdisk(name_buf, device, devnode, devicenode);
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else if (device[0] == 'f' && device[1] == 'd'
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&& device[2] == '0' && device[3] == '\0')
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/* All the models I've seen have a devalias "floppy".
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New models have no floppy at all. */
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{
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strcpy (ofpath, "floppy");
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ret = 0;
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}
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ofpath = xstrdup ("floppy");
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else
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{
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grub_util_warn (_("unknown device type %s\n"), device);
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|
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@ -433,12 +453,6 @@ grub_util_devname_to_ofpath (const char *devname)
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free (devicenode);
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free (name_buf);
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if (ret)
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{
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free (ofpath);
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return NULL;
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}
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return ofpath;
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}
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|
|
@ -454,7 +468,8 @@ int main(int argc, char **argv)
|
|||
}
|
||||
|
||||
of_path = grub_util_devname_to_ofpath (argv[1]);
|
||||
printf("%s\n", of_path);
|
||||
if (of_path)
|
||||
printf("%s\n", of_path);
|
||||
free (of_path);
|
||||
|
||||
return 0;
|
||||
|
|
|
|||
Loading…
Reference in New Issue