coredump: factor out put_cred() calls
Given that do_coredump() calls put_cred() on exit path, it is a bit ugly
to do put_cred() + "goto fail" twice, just add the new "fail_creds" label.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/exec.c b/fs/exec.c
index 1221c4c..6501823 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1862,10 +1862,8 @@
goto fail;
cred = prepare_creds();
- if (!cred) {
- retval = -ENOMEM;
+ if (!cred)
goto fail;
- }
down_write(&mm->mmap_sem);
/*
@@ -1873,8 +1871,7 @@
*/
if (mm->core_state || !__get_dumpable(cprm.mm_flags)) {
up_write(&mm->mmap_sem);
- put_cred(cred);
- goto fail;
+ goto fail_creds;
}
/*
@@ -1889,10 +1886,8 @@
}
retval = coredump_wait(exit_code, &core_state);
- if (retval < 0) {
- put_cred(cred);
- goto fail;
- }
+ if (retval < 0)
+ goto fail_creds;
old_cred = override_creds(cred);
@@ -2009,9 +2004,10 @@
if (ispipe)
atomic_dec(&core_dump_count);
fail_unlock:
- revert_creds(old_cred);
- put_cred(cred);
coredump_finish(mm);
+ revert_creds(old_cred);
+fail_creds:
+ put_cred(cred);
fail:
return;
}