!55 runc: fix connect container failed when reading partially written state.json content

From: @cenhuilin 
Reviewed-by: @yangzhao_kl 
Signed-off-by: @yangzhao_kl

patch/0131-runc-save-state-atomic.patch

@@ -0,0 +1,57 @@
+From 957c155cdf03ef1b3bb53d1e107850924bda2c89 Mon Sep 17 00:00:00 2001
+From: cenhuilin <cenhuilin@kylinos.cn>
+Date: Fri, 8 Jul 2022 02:00:53 +0000
+Subject: [PATCH] Write state.json atomically
+We want to make sure that the state file is syned and cannot be
+read partially or truncated.
+
+Signed-off-by: Mrunal Patel <mrunalp@gmail.com>
+---
+ libcontainer/container_linux.go | 31 ++++++++++++++++++++++++-------
+ 1 file changed, 24 insertions(+), 7 deletions(-)
+
+diff --git a/libcontainer/container_linux.go b/libcontainer/container_linux.go
+index 7be84a6..709a95e 100644
+--- a/libcontainer/container_linux.go
++++ b/libcontainer/container_linux.go
+@@ -1385,13 +1385,30 @@ func (c *linuxContainer) updateState(process parentProcess) (*State, error) {
+ 	return state, nil
+ }
+ 
+-func (c *linuxContainer) saveState(s *State) error {
+-	f, err := os.Create(filepath.Join(c.root, stateFilename))
+-	if err != nil {
+-		return err
+-	}
+-	defer f.Close()
+-	return utils.WriteJSON(f, s)
++func (c *linuxContainer) saveState(s *State) (retErr error) {
++        tmpFile, err := ioutil.TempFile(c.root, "state-")
++        if err != nil {
++                return err
++        }
++
++        defer func() {
++                if retErr != nil {
++                        tmpFile.Close()
++                        os.Remove(tmpFile.Name())
++                }
++        }()
++
++        err = utils.WriteJSON(tmpFile, s)
++        if err != nil {
++                return err
++        }
++        err = tmpFile.Close()
++        if err != nil {
++                return err
++        }
++
++        stateFilePath := filepath.Join(c.root, stateFilename)
++        return os.Rename(tmpFile.Name(), stateFilePath)
+ }
+ 
+ func (c *linuxContainer) deleteState() error {
+-- 
+2.33.0
+

runc.spec

@@ -4,7 +4,7 @@
 
 Name: docker-runc
 Version: 1.0.0.rc3
-Release: 117
+Release: 118
 Summary: runc is a CLI tool for spawning and running containers according to the OCI specification.
 
 License: ASL 2.0
@@ -53,6 +53,12 @@ install -p -m 755 runc $RPM_BUILD_ROOT/%{_bindir}/runc
 %{_bindir}/runc
 
 %changelog
+* Fri Jul  8 2022 cenhuilin <cenhuilin@kylinos.cn> - 1.0.0.rc3-118
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:fix connect container failed when reading partially written state.json content 
+
 * Mon Apr 11 2022 fushanqing <fushanqing@kylinos.cn> - 1.0.0.rc3-117
 - add macro
 

series.conf

@@ -128,4 +128,5 @@ patch/0127-runc-add-mount-destination-validation-fix-CVE-2021.patch
 patch/0128-runc-optimize-nsexec-logging.patch
 patch/0129-runc-improve-log-for-debugging.patch
 patch/0130-runc-fix-cgroup-info-print-error.patch
+patch/0131-runc-save-state-atomic.patch
 #end