binfmt_elf_fdpic: Fix clear_user() error handling

clear_user() returns the number of bytes that could not be copied rather than
an error code.  So we should return -EFAULT rather than directly returning the
results.

Without this patch, positive values may be returned to elf_fdpic_map_file()
and the following error handlings do not function as expected.

1.
	ret = elf_fdpic_map_file_constdisp_on_uclinux(params, file, mm);
	if (ret < 0)
		return ret;
2.
	ret = elf_fdpic_map_file_by_direct_mmap(params, file, mm);
	if (ret < 0)
		return ret;

Signed-off-by: Takuya Yoshikawa <[email protected]>
Signed-off-by: David Howells <[email protected]>
Acked-by: Mike Frysinger <[email protected]>
CC: Alexander Viro <[email protected]>
CC: Andrew Morton <[email protected]>
CC: Daisuke HATAYAMA <[email protected]>
CC: Paul Mundt <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions