cpio: internalize archive_xread_all_eof. add a few paranoia checks

 for corrupted cpio files.
modprobe-small: remove stray include
route: small code shrink

function                                             old     new   delta
get_header_cpio                                      958     980     +22
archive_xread_all_eof                                 33       -     -33
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 22/-33)            Total: -11 bytes

9 files changed, 45 insertions, 64 deletions

diff --git a/archival/libunarchive/Kbuild b/archival/libunarchive/Kbuild
index 609bc50cb..468a7e82a 100644
--- a/archival/libunarchive/Kbuild
+++ b/archival/libunarchive/Kbuild
@@ -19,8 +19,6 @@ lib-y:= \
         header_list.o \
         header_verbose_list.o \
 \
-        archive_xread_all_eof.o \
-\
         seek_by_read.o \
         seek_by_jump.o \
 \
diff --git a/archival/libunarchive/archive_xread_all_eof.c b/archival/libunarchive/archive_xread_all_eof.c
deleted file mode 100644
index f11a7fd32..000000000
--- a/archival/libunarchive/archive_xread_all_eof.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- */
-
-#include "libbb.h"
-#include "unarchive.h"
-
-ssize_t FAST_FUNC archive_xread_all_eof(archive_handle_t *archive_handle,
-                        unsigned char *buf, size_t count)
-{
-        ssize_t size;
-
-        size = full_read(archive_handle->src_fd, buf, count);
-        if (size != 0 && size != (ssize_t)count) {
-                bb_error_msg_and_die("short read: %u of %u",
-                                (unsigned)size, (unsigned)count);
-        }
-        return size;
-}
diff --git a/archival/libunarchive/get_header_cpio.c b/archival/libunarchive/get_header_cpio.c
index 307d2a66d..93f6c61aa 100644
--- a/archival/libunarchive/get_header_cpio.c
+++ b/archival/libunarchive/get_header_cpio.c
@@ -21,26 +21,28 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
 {
         file_header_t *file_header = archive_handle->file_header;
         char cpio_header[110];
-        char dummy[16];
         int namesize;
         int major, minor, nlink, mode, inode;
         unsigned size, uid, gid, mtime;
 
-#define saved_hardlinks         (*(hardlinks_t **)(&archive_handle->ah_priv[0]))
-#define saved_hardlinks_created (*(hardlinks_t **)(&archive_handle->ah_priv[1]))
+#define hardlinks_to_create (*(hardlinks_t **)(&archive_handle->ah_priv[0]))
+#define created_hardlinks   (*(hardlinks_t **)(&archive_handle->ah_priv[1]))
 //      if (!archive_handle->ah_priv_inited) {
 //              archive_handle->ah_priv_inited = 1;
-//              saved_hardlinks = NULL;
-//              saved_hardlinks_created = NULL;
+//              hardlinks_to_create = NULL;
+//              created_hardlinks = NULL;
 //      }
 
         /* There can be padding before archive header */
         data_align(archive_handle, 4);
 
-//TODO: this function is used only here, make it static?
-        if (archive_xread_all_eof(archive_handle, (unsigned char*)cpio_header, 110) == 0) {
+        size = full_read(archive_handle->src_fd, cpio_header, 110);
+        if (size == 0) {
                 goto create_hardlinks;
         }
+        if (size != 110) {
+                bb_error_msg_and_die("short read");
+        }
         archive_handle->offset += 110;
 
         if (strncmp(&cpio_header[0], "07070", 5) != 0
@@ -49,20 +51,21 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
                 bb_error_msg_and_die("unsupported cpio format, use newc or crc");
         }
 
-        sscanf(cpio_header + 6,
+        if (sscanf(cpio_header + 6,
                         "%8x" "%8x" "%8x" "%8x"
-                        "%8x" "%8x" "%8x" /*maj,min:*/ "%16c"
-                        /*rmaj,rmin:*/"%8x" "%8x" "%8x" /*chksum:*/ "%8c",
+                        "%8x" "%8x" "%8x" /*maj,min:*/ "%*16c"
+                        /*rmaj,rmin:*/"%8x" "%8x" "%8x" /*chksum: "%*8c"*/,
                         &inode, &mode, &uid, &gid,
-                        &nlink, &mtime, &size, dummy,
-                        &major, &minor, &namesize, dummy);
+                        &nlink, &mtime, &size,
+                        &major, &minor, &namesize) != 10)
+                bb_error_msg_and_die("damaged cpio file");
         file_header->mode = mode;
         file_header->uid = uid;
         file_header->gid = gid;
         file_header->mtime = mtime;
         file_header->size = size;
 
-        namesize &= 0x1fff; /* paranoia: names can't be that long */
+        namesize &= 0x1fff; /* paranoia: limit names to 8k chars */
         file_header->name = xzalloc(namesize + 1);
         /* Read in filename */
         xread(archive_handle->src_fd, file_header->name, namesize);
@@ -77,17 +80,17 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
                 goto create_hardlinks;
         }
 
+        file_header->link_target = NULL;
         if (S_ISLNK(file_header->mode)) {
+                file_header->size &= 0x1fff; /* paranoia: limit names to 8k chars */
                 file_header->link_target = xzalloc(file_header->size + 1);
                 xread(archive_handle->src_fd, file_header->link_target, file_header->size);
                 archive_handle->offset += file_header->size;
                 file_header->size = 0; /* Stop possible seeks in future */
-        } else {
-                file_header->link_target = NULL;
         }
 
 // TODO: data_extract_all can't deal with hardlinks to non-files...
-// (should be !S_ISDIR instead of S_ISREG here)
+// when fixed, change S_ISREG to !S_ISDIR here
 
         if (nlink > 1 && S_ISREG(file_header->mode)) {
                 hardlinks_t *new = xmalloc(sizeof(*new) + namesize);
@@ -99,13 +102,13 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
                 strcpy(new->name, file_header->name);
                 /* Put file on a linked list for later */
                 if (size == 0) {
-                        new->next = saved_hardlinks;
-                        saved_hardlinks = new;
+                        new->next = hardlinks_to_create;
+                        hardlinks_to_create = new;
                         return EXIT_SUCCESS; /* Skip this one */
                         /* TODO: this breaks cpio -t (it does not show hardlinks) */
                 }
-                new->next = saved_hardlinks_created;
-                saved_hardlinks_created = new;
+                new->next = created_hardlinks;
+                created_hardlinks = new;
         }
         file_header->device = makedev(major, minor);
 
@@ -129,18 +132,23 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
         free(file_header->link_target);
         free(file_header->name);
 
-        while (saved_hardlinks) {
+        while (hardlinks_to_create) {
                 hardlinks_t *cur;
-                hardlinks_t *make_me = saved_hardlinks;
-                saved_hardlinks = make_me->next;
+                hardlinks_t *make_me = hardlinks_to_create;
+
+                hardlinks_to_create = make_me->next;
 
                 memset(file_header, 0, sizeof(*file_header));
+                file_header->mtime = make_me->mtime;
                 file_header->name = make_me->name;
                 file_header->mode = make_me->mode;
+                file_header->uid = make_me->uid;
+                file_header->gid = make_me->gid;
                 /*file_header->size = 0;*/
+                /*file_header->link_target = NULL;*/
 
                 /* Try to find a file we are hardlinked to */
-                cur = saved_hardlinks_created;
+                cur = created_hardlinks;
                 while (cur) {
                         /* TODO: must match maj/min too! */
                         if (cur->inode == make_me->inode) {
@@ -155,20 +163,17 @@ char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle)
                 }
                 /* Oops... no file with such inode was created... do it now
                  * (happens when hardlinked files are empty (zero length)) */
-                file_header->mtime = make_me->mtime;
-                file_header->uid   = make_me->uid  ;
-                file_header->gid   = make_me->gid  ;
                 if (archive_handle->filter(archive_handle) == EXIT_SUCCESS)
                         archive_handle->action_data(archive_handle);
                 /* Move to the list of created hardlinked files */
-                make_me->next = saved_hardlinks_created;
-                saved_hardlinks_created = make_me;
+                make_me->next = created_hardlinks;
+                created_hardlinks = make_me;
  next_link: ;
         }
 
-        while (saved_hardlinks_created) {
-                hardlinks_t *p = saved_hardlinks_created;
-                saved_hardlinks_created = p->next;
+        while (created_hardlinks) {
+                hardlinks_t *p = created_hardlinks;
+                created_hardlinks = p->next;
                 free(p);
         }
 
diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c
index e9c730d65..7e3c482df 100644
--- a/archival/libunarchive/get_header_tar.c
+++ b/archival/libunarchive/get_header_tar.c
@@ -364,7 +364,7 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
         archive_handle->offset += file_header->size;
 
         free(file_header->link_target);
-        /* Do not free(file_header->name)! */
+        /* Do not free(file_header->name)! (why?) */
 #if ENABLE_FEATURE_TAR_UNAME_GNAME
         free(file_header->uname);
         free(file_header->gname);
diff --git a/e2fsprogs/old_e2fsprogs/blkid/devname.c b/e2fsprogs/old_e2fsprogs/blkid/devname.c
index 071aa5a12..97d1c3548 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/devname.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/devname.c
@@ -237,7 +237,7 @@ evms_probe_all(blkid_cache cache)
         if (!procpt)
                 return 0;
         while (fgets(line, sizeof(line), procpt)) {
-                if (sscanf (line, " %d %d %d %*s %*s %[^\n ]",
+                if (sscanf(line, " %d %d %d %*s %*s %[^\n ]",
                             &ma, &mi, &sz, device) != 4)
                         continue;
 
diff --git a/include/unarchive.h b/include/unarchive.h
index 17a46b6d7..cf23d98bf 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -105,8 +105,6 @@ extern char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
 extern void seek_by_jump(const archive_handle_t *archive_handle, unsigned amount) FAST_FUNC;
 extern void seek_by_read(const archive_handle_t *archive_handle, unsigned amount) FAST_FUNC;
 
-extern ssize_t archive_xread_all_eof(archive_handle_t *archive_handle, unsigned char *buf, size_t count) FAST_FUNC;
-
 extern void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
 extern const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
 extern const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index 517c103d5..ae7c29cd1 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -9,7 +9,6 @@
  */
 
 #include "libbb.h"
-#include "unarchive.h"
 
 #include <sys/utsname.h> /* uname() */
 #include <fnmatch.h>
diff --git a/networking/route.c b/networking/route.c
index f467ed3fd..7b6d4f45f 100644
--- a/networking/route.c
+++ b/networking/route.c
@@ -561,8 +561,8 @@ static void INET6_displayroutes(void)
         while (1) {
                 int r;
                 r = fscanf(fp, "%32s%x%*s%x%32s%x%x%x%x%s\n",
-                                   addr6x+14, &prefix_len, &slen, addr6x+40+7,
-                                   &metric, &use, &refcnt, &iflags, iface);
+                                addr6x+14, &prefix_len, &slen, addr6x+40+7,
+                                &metric, &use, &refcnt, &iflags, iface);
                 if (r != 9) {
                         if ((r < 0) && feof(fp)) { /* EOF with no (nonspace) chars read. */
                                 break;
diff --git a/procps/fuser.c b/procps/fuser.c
index 8afa958b6..d8005b568 100644
--- a/procps/fuser.c
+++ b/procps/fuser.c
@@ -100,7 +100,6 @@ static inode_list *scan_proc_net(const char *proto,
                                 unsigned port, inode_list *ilist)
 {
         char path[20], line[MAX_LINE + 1];
-        char addr[128];
         ino_t tmp_inode;
         dev_t tmp_dev;
         long long uint64_inode;
@@ -115,13 +114,15 @@ static inode_list *scan_proc_net(const char *proto,
                 return ilist;
 
         while (fgets(line, MAX_LINE, f)) {
+                char addr[64];
                 if (sscanf(line, "%*d: %64[0-9A-Fa-f]:%x %*x:%*x %*x %*x:%*x "
                                 "%*x:%*x %*x %*d %*d %llu",
                                 addr, &tmp_port, &uint64_inode) == 3
                 ) {
-                        if (strlen(addr) == 8 && (option_mask32 & OPT_IP6))
+                        int len = strlen(addr);
+                        if (len == 8 && (option_mask32 & OPT_IP6))
                                 continue;
-                        if (strlen(addr) > 8 && (option_mask32 & OPT_IP4))
+                        if (len > 8 && (option_mask32 & OPT_IP4))
                                 continue;
                         if (tmp_port == port) {
                                 tmp_inode = uint64_inode;