diff options
Diffstat (limited to 'nis')
| -rw-r--r-- | nis/nss_nisplus/nisplus-parser.c | 83 |
1 files changed, 49 insertions, 34 deletions
diff --git a/nis/nss_nisplus/nisplus-parser.c b/nis/nss_nisplus/nisplus-parser.c index 6fd8f2ef33..5ed07d86d9 100644 --- a/nis/nss_nisplus/nisplus-parser.c +++ b/nis/nss_nisplus/nisplus-parser.c @@ -84,27 +84,37 @@ _nss_nisplus_parse_pwent (nis_result *result, size_t entry, struct passwd *pw, room_left -= len + 1; first_unused += len + 1; - if (NISENTRYLEN (entry, 2, result) >= room_left) - goto no_more_room; + char *numstr = NISENTRYVAL (entry, 2, result); + len = NISENTRYLEN (entry, 2, result); + if (len == 0 && numstr[len - 1] != '\0') + { + if (len >= room_left) + goto no_more_room; - strncpy (first_unused, NISENTRYVAL (entry, 2, result), - NISENTRYLEN (entry, 2, result)); - first_unused[NISENTRYLEN (entry, 2, result)] = '\0'; - len = strlen (first_unused); - if (len == 0) /* If we don't have a uid, it's an invalid shadow entry */ + strncpy (first_unused, numstr, len); + first_unused[len] = '\0'; + numstr = first_unused; + } + if (numstr[0] == '\0') + /* If we don't have a uid, it's an invalid shadow entry. */ return 0; - pw->pw_uid = strtoul (first_unused, NULL, 10); + pw->pw_uid = strtoul (numstr, NULL, 10); - if (NISENTRYLEN (entry, 3, result) >= room_left) - goto no_more_room; + numstr = NISENTRYVAL (entry, 3, result); + len = NISENTRYLEN (entry, 3, result); + if (len == 0 && numstr[len - 1] != '\0') + { + if (len >= room_left) + goto no_more_room; - strncpy (first_unused, NISENTRYVAL (entry, 3, result), - NISENTRYLEN (entry, 3, result)); - first_unused[NISENTRYLEN (entry, 3, result)] = '\0'; - len = strlen (first_unused); - if (len == 0) /* If we don't have a gid, it's an invalid shadow entry */ + strncpy (first_unused, numstr, len); + first_unused[len] = '\0'; + numstr = first_unused; + } + if (numstr[0] == '\0') + /* If we don't have a gid, it's an invalid shadow entry. */ return 0; - pw->pw_gid = strtoul (first_unused, NULL, 10); + pw->pw_gid = strtoul (numstr, NULL, 10); if (NISENTRYLEN(entry, 4, result) >= room_left) goto no_more_room; @@ -178,8 +188,8 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr, if (len == 0) /* group table is corrupt */ return 0; gr->gr_name = first_unused; - room_left -= (len + 1); - first_unused += (len + 1); + room_left -= len + 1; + first_unused += len + 1; if (NISENTRYLEN (entry, 1, result) >= room_left) goto no_more_room; @@ -189,19 +199,24 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr, first_unused[NISENTRYLEN (entry, 1, result)] = '\0'; gr->gr_passwd = first_unused; len = strlen (first_unused); - room_left -= (len + 1); - first_unused += (len + 1); + room_left -= len + 1; + first_unused += len + 1; - if (NISENTRYLEN (entry, 2, result) >= room_left) - goto no_more_room; + char *numstr = NISENTRYVAL (entry, 2, result); + len = NISENTRYLEN (entry, 2, result); + if (len == 0 && numstr[len - 1] != '\0') + { + if (len >= room_left) + goto no_more_room; - strncpy (first_unused, NISENTRYVAL (entry, 2, result), - NISENTRYLEN (entry, 2, result)); - first_unused[NISENTRYLEN (entry, 2, result)] = '\0'; - len = strlen (first_unused); - if (len == 0) /* We should always have a gid */ + strncpy (first_unused, numstr, len); + first_unused[len] = '\0'; + numstr = first_unused; + } + if (numstr[0] == '\0') + /* We should always have a gid. */ return 0; - gr->gr_gid = strtoul (first_unused, NULL, 10); + gr->gr_gid = strtoul (numstr, NULL, 10); if (NISENTRYLEN (entry, 3, result) >= room_left) goto no_more_room; @@ -211,8 +226,8 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr, first_unused[NISENTRYLEN (entry, 3, result)] = '\0'; line = first_unused; len = strlen (line); - room_left -= (len + 1); - first_unused += (len + 1); + room_left -= len + 1; + first_unused += len + 1; /* Adjust the pointer so it is aligned for storing pointers. */ size_t adjust = ((__alignof__ (char *) @@ -294,8 +309,8 @@ _nss_nisplus_parse_spent (nis_result *result, struct spwd *sp, if (len == 0) return 0; sp->sp_namp = first_unused; - room_left -= (len + 1); - first_unused += (len + 1); + room_left -= len + 1; + first_unused += len + 1; if (NISENTRYLEN (0, 1, result) >= room_left) goto no_more_room; @@ -305,8 +320,8 @@ _nss_nisplus_parse_spent (nis_result *result, struct spwd *sp, first_unused[NISENTRYLEN (0, 1, result)] = '\0'; sp->sp_pwdp = first_unused; len = strlen (first_unused); - room_left -= (len + 1); - first_unused += (len + 1); + room_left -= len + 1; + first_unused += len + 1; sp->sp_lstchg = sp->sp_min = sp->sp_max = sp->sp_warn = sp->sp_inact = sp->sp_expire = -1; |