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-rw-r--r--fs/binfmt_elf.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index f36f221..288386b1 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -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);
}
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