[PATCH 3.16 199/202] binfmt_elf: Fix missing SIGKILL for empty PIE

[Ben Hutchings]

3.16.66-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <b...@decadent.org.uk>

Commit ea08dc5191d9 "fs/binfmt_elf.c: fix bug in loading of PIE
binaries", which was a backport of commit a87938b2e246 upstream,
added a new failure path to load_elf_binary().

Before commit 19d860a140be "handle suicide on late failure exits in
execve() in search_binary_handler()", load_elf_binary() wass
responsible for sending a fatal signal to the task in case of an error
after flushing the old executable.  Add that to the new failure path.

Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -822,6 +822,7 @@ static int load_elf_binary(struct linux_
                        total_size = total_mapping_size(elf_phdata,
                                                        loc->elf_ex.e_phnum);
                        if (!total_size) {
+                               send_sig(SIGKILL, current, 0);
                                retval = -EINVAL;
                                goto out_free_dentry;
                        }