Merge pull request #5118 from kolyshkin/lint29

ci: bump golangci-lint to v2.10, fix some prealloc linter warnings

.github/workflows/validate.yml

@@ -41,7 +41,7 @@ jobs:
           sudo apt -qy install libseccomp-dev
       - uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.6
+          version: v2.10
           skip-cache: true
       # Extra linters, only checking new code from a pull request to main.
       - name: lint-extra

events.go

@@ -199,7 +199,7 @@ func convertMemoryEntry(c cgroups.MemoryData) types.MemoryEntry {
 }
 
 func convertBlkioEntry(c []cgroups.BlkioStatEntry) []types.BlkioEntry {
-	var out []types.BlkioEntry
+	out := make([]types.BlkioEntry, 0, len(c))
 	for _, e := range c {
 		out = append(out, types.BlkioEntry(e))
 	}

libcontainer/internal/userns/usernsfd_linux.go

@@ -41,10 +41,11 @@ func (m Mapping) toSys() (uids, gids []syscall.SysProcIDMap) {
 // the uid and gid mappings (because the order doesn't matter to the kernel).
 // The set of userns handles is indexed using this ID.
 func (m Mapping) id() string {
-	var uids, gids []string
+	uids := make([]string, 0, len(m.UIDMappings))
 	for _, idmap := range m.UIDMappings {
 		uids = append(uids, fmt.Sprintf("%d:%d:%d", idmap.ContainerID, idmap.HostID, idmap.Size))
 	}
+	gids := make([]string, 0, len(m.GIDMappings))
 	for _, idmap := range m.GIDMappings {
 		gids = append(gids, fmt.Sprintf("%d:%d:%d", idmap.ContainerID, idmap.HostID, idmap.Size))
 	}