Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 16 insertions, 10 deletions

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index f36f2210204f..f979ebbce49c 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -58,7 +58,7 @@ extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
  * If we don't support core dumping, then supply a NULL so we
  * don't even try.
  */
-#ifdef USE_ELF_CORE_DUMP
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
 static int elf_core_dump(long signr, struct pt_regs * regs, struct file * file);
 #else
 #define elf_core_dump   NULL
@@ -288,11 +288,17 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,
                         struct elf_phdr *eppnt, int prot, int type)
 {
         unsigned long map_addr;
+        unsigned long pageoffset = ELF_PAGEOFFSET(eppnt->p_vaddr);
 
         down_write(&current->mm->mmap_sem);
-        map_addr = do_mmap(filep, ELF_PAGESTART(addr),
-                           eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr), prot, type,
-                           eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr));
+        /* mmap() will return -EINVAL if given a zero size, but a
+         * segment with zero filesize is perfectly valid */
+        if (eppnt->p_filesz + pageoffset)
+                map_addr = do_mmap(filep, ELF_PAGESTART(addr),
+                                   eppnt->p_filesz + pageoffset, prot, type,
+                                   eppnt->p_offset - pageoffset);
+        else
+                map_addr = ELF_PAGESTART(addr);
         up_write(&current->mm->mmap_sem);
         return(map_addr);
 }
@@ -616,7 +622,7 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                                 goto out_free_file;
 
                         retval = -ENOMEM;
-                        elf_interpreter = (char *) kmalloc(elf_ppnt->p_filesz,
+                        elf_interpreter = kmalloc(elf_ppnt->p_filesz,
                                                            GFP_KERNEL);
                         if (!elf_interpreter)
                                 goto out_free_file;
@@ -1107,7 +1113,7 @@ out:
  * Note that some platforms still use traditional core dumps and not
  * the ELF core dump.  Each platform can select it as appropriate.
  */
-#ifdef USE_ELF_CORE_DUMP
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
 
 /*
  * ELF core dumper
@@ -1628,17 +1634,17 @@ static int elf_core_dump(long signr, struct pt_regs * regs, struct file * file)
         ELF_CORE_WRITE_EXTRA_DATA;
 #endif
 
-        if ((off_t) file->f_pos != offset) {
+        if ((off_t)file->f_pos != offset) {
                 /* Sanity check */
-                printk("elf_core_dump: file->f_pos (%ld) != offset (%ld)\n",
-                       (off_t) file->f_pos, offset);
+                printk(KERN_WARNING "elf_core_dump: file->f_pos (%ld) != offset (%ld)\n",
+                       (off_t)file->f_pos, offset);
         }
 
 end_coredump:
         set_fs(fs);
 
 cleanup:
-        while(!list_empty(&thread_list)) {
+        while (!list_empty(&thread_list)) {
                 struct list_head *tmp = thread_list.next;
                 list_del(tmp);
                 kfree(list_entry(tmp, struct elf_thread_status, list));