rpm: prevent race in tempdir creation

This patch fixes an extramely rare race condition in creation of rpmdb
temporary directory. The "rpmdb-more-verbose-error-logging" patch is
still left in place, just for the case.

[YOCTO #9416]

(From OE-Core rev: 84de3283fa2a2908d367eb58953903ae685b0298)

(From OE-Core rev: 1ae228ee5181f12955356c1fe10d341373dd5fcc)

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/meta/recipes-devtools/rpm/rpm/rpmdb-prevent-race-in-tmpdir-creation.patch b/meta/recipes-devtools/rpm/rpm/rpmdb-prevent-race-in-tmpdir-creation.patch
new file mode 100644
index 0000000000..f483f3ad90
--- /dev/null
+++ b/meta/recipes-devtools/rpm/rpm/rpmdb-prevent-race-in-tmpdir-creation.patch
@@ -0,0 +1,41 @@
+rpmdb: prevent race in tmpdir creation
+
+If two (or more) instances of rpm are running at the same time they may
+be trying to create the same (base-)temporary directory at the same time
+which causes the other mkdir to fail with EEXIST. This patch prevents a
+failure caused by this race by ignoring EEXIST error on directory
+creation.
+
+Upstream-Status: Pending
+
+Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
+
+diff --git a/rpmdb/signature.c b/rpmdb/signature.c
+index dce6c4e..100204b 100644
+--- a/rpmdb/signature.c
++++ b/rpmdb/signature.c
+@@ -37,6 +37,7 @@ int rpmTempFile(const char * prefix, const char ** fnptr, void * fdptr)
+     int temput;
+     FD_t fd = NULL;
+     unsigned int ran;
++    int ret = 0;
+ 
+     if (!prefix) prefix = "";
+ 
+@@ -44,8 +45,11 @@ int rpmTempFile(const char * prefix, const char ** fnptr, void * fdptr)
+     if (!_initialized) {
+        _initialized = 1;
+        tempfn = rpmGenPath(prefix, tpmacro, NULL);
+-       if (rpmioMkpath(tempfn, 0755, (uid_t) -1, (gid_t) -1))
+-           goto errxit;
++        ret = rpmioMkpath(tempfn, 0755, (uid_t) -1, (gid_t) -1);
++        if (ret && ret != EEXIST) {
++            rpmlog(RPMLOG_ERR, _("error creating temporary directory %s: %d\n"), tempfn, ret);
++            goto errxit;
++        }
+     }
+ 
+     /* XXX should probably use mkstemp here */
+-- 
+2.6.6
+