File 0400-9pfs-don-t-use-AT_EMPTY_PATH-in-loc.patch of Package qemu-linux-user.8405

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File 0400-9pfs-don-t-use-AT_EMPTY_PATH-in-loc.patch of Package qemu-linux-user.8405

From baeea013fe155a9a2d7c7f5304a272966fd2de29 Mon Sep 17 00:00:00 2001
From: Greg Kurz <groug@kaod.org>
Date: Mon, 6 Mar 2017 17:34:01 +0100
Subject: [PATCH] 9pfs: don't use AT_EMPTY_PATH in local_set_cred_passthrough()

The name argument can never be an empty string, and dirfd always point to
the containing directory of the file name. AT_EMPTY_PATH is hence useless
here. Also it breaks build with glibc version 2.13 and older.

It is actually an oversight of a previous tentative patch to implement this
function. We can safely drop it.

Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Greg Kurz <groug@kaod.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit b314f6a077a1dbc0463a5dc41162f64950048e72)
[BR: Fix and/or infrastructure for BSC#1020427 CVE-2016-9602]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/9pfs/9p-local.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index 58c002ef7e..991804cdb9 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -345,7 +345,7 @@ static int local_set_cred_passthrough(FsContext *fs_ctx, int dirfd,
                                       const char *name, FsCred *credp)
 {
     if (fchownat(dirfd, name, credp->fc_uid, credp->fc_gid,
-                 AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH) < 0) {
+                 AT_SYMLINK_NOFOLLOW) < 0) {
         /*
          * If we fail to change ownership and if we are
          * using security model none. Ignore the error

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File 0400-9pfs-don-t-use-AT_EMPTY_PATH-in-loc.patch of Package qemu-linux-user.8405

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