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authorJonathan Dieter <jonathan.dieter@spearline.com>2020-08-11 15:51:16 +0100
committerJonathan Dieter <jonathan.dieter@spearline.com>2020-08-11 16:42:39 +0100
commitec231973d813e68479b99382350a8684d9c0a685 (patch)
tree1111f512d30a97b016eca0463415535c82703377 /pkg/rootless/rootless_linux.go
parenta90ae00df1c2be0f3d46d4e7cd292599c93ded0f (diff)
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Fix hang when `path` doesn't exist
I'm not sure if this is an OS-specific issue, but on CentOS 8, if `path` doesn't exist, this hangs while waiting to read from this socket, even though the socket is closed by the `reexec_in_user_namespace`. Switching to a pipe fixes the problem, and pipes shouldn't be an issue since this is Linux-specific code. Signed-off-by: Jonathan Dieter <jonathan.dieter@spearline.com>
Diffstat (limited to 'pkg/rootless/rootless_linux.go')
-rw-r--r--pkg/rootless/rootless_linux.go4
1 files changed, 1 insertions, 3 deletions
diff --git a/pkg/rootless/rootless_linux.go b/pkg/rootless/rootless_linux.go
index c3f1fc7fa..ecd309d36 100644
--- a/pkg/rootless/rootless_linux.go
+++ b/pkg/rootless/rootless_linux.go
@@ -389,14 +389,12 @@ func TryJoinFromFilePaths(pausePidPath string, needNewNamespace bool, paths []st
lastErr = nil
break
} else {
- fds, err := unix.Socketpair(unix.AF_UNIX, unix.SOCK_DGRAM, 0)
+ r, w, err := os.Pipe()
if err != nil {
lastErr = err
continue
}
- r, w := os.NewFile(uintptr(fds[0]), "read file"), os.NewFile(uintptr(fds[1]), "write file")
-
defer errorhandling.CloseQuiet(r)
if _, _, err := becomeRootInUserNS("", path, w); err != nil {