diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index 62022b18caf5ec17231fd0e7be1234592d1146e3..d553ad9361ce17950d505c3b372a568730020e2f 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -17,6 +17,7 @@
 #include "kunit.c"
 #include "mutex.c"
 #include "page.c"
+#include "pid_namespace.c"
 #include "rbtree.c"
 #include "refcount.c"
 #include "security.c"
diff --git a/rust/helpers/pid_namespace.c b/rust/helpers/pid_namespace.c
new file mode 100644
index 0000000000000000000000000000000000000000..f41482bdec9a7c4e84b81ec141027fbd65251230
--- /dev/null
+++ b/rust/helpers/pid_namespace.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/pid_namespace.h>
+#include <linux/cleanup.h>
+
+struct pid_namespace *rust_helper_get_pid_ns(struct pid_namespace *ns)
+{
+	return get_pid_ns(ns);
+}
+
+void rust_helper_put_pid_ns(struct pid_namespace *ns)
+{
+	put_pid_ns(ns);
+}
+
+/* Get a reference on a task's pid namespace. */
+struct pid_namespace *rust_helper_task_get_pid_ns(struct task_struct *task)
+{
+	struct pid_namespace *pid_ns;
+
+	guard(rcu)();
+	pid_ns = task_active_pid_ns(task);
+	if (pid_ns)
+		get_pid_ns(pid_ns);
+	return pid_ns;
+}
diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs
index ff7d88022c57ca232dc028066dfa062f3fc84d1c..0e78ec9d06e0199dfafc40988a2ae86cd5df949c 100644
--- a/rust/kernel/lib.rs
+++ b/rust/kernel/lib.rs
@@ -44,6 +44,7 @@
 #[cfg(CONFIG_NET)]
 pub mod net;
 pub mod page;
+pub mod pid_namespace;
 pub mod prelude;
 pub mod print;
 pub mod sizes;
diff --git a/rust/kernel/pid_namespace.rs b/rust/kernel/pid_namespace.rs
new file mode 100644
index 0000000000000000000000000000000000000000..0e93808e4639b37dd77add5d79f64058dac7cb87
--- /dev/null
+++ b/rust/kernel/pid_namespace.rs
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+
+// Copyright (c) 2024 Christian Brauner <brauner@kernel.org>
+
+//! Pid namespaces.
+//!
+//! C header: [`include/linux/pid_namespace.h`](srctree/include/linux/pid_namespace.h) and
+//! [`include/linux/pid.h`](srctree/include/linux/pid.h)
+
+use crate::{
+    bindings,
+    types::{AlwaysRefCounted, Opaque},
+};
+use core::ptr;
+
+/// Wraps the kernel's `struct pid_namespace`. Thread safe.
+///
+/// This structure represents the Rust abstraction for a C `struct pid_namespace`. This
+/// implementation abstracts the usage of an already existing C `struct pid_namespace` within Rust
+/// code that we get passed from the C side.
+#[repr(transparent)]
+pub struct PidNamespace {
+    inner: Opaque<bindings::pid_namespace>,
+}
+
+impl PidNamespace {
+    /// Returns a raw pointer to the inner C struct.
+    #[inline]
+    pub fn as_ptr(&self) -> *mut bindings::pid_namespace {
+        self.inner.get()
+    }
+
+    /// Creates a reference to a [`PidNamespace`] from a valid pointer.
+    ///
+    /// # Safety
+    ///
+    /// The caller must ensure that `ptr` is valid and remains valid for the lifetime of the
+    /// returned [`PidNamespace`] reference.
+    pub unsafe fn from_ptr<'a>(ptr: *const bindings::pid_namespace) -> &'a Self {
+        // SAFETY: The safety requirements guarantee the validity of the dereference, while the
+        // `PidNamespace` type being transparent makes the cast ok.
+        unsafe { &*ptr.cast() }
+    }
+}
+
+// SAFETY: Instances of `PidNamespace` are always reference-counted.
+unsafe impl AlwaysRefCounted for PidNamespace {
+    #[inline]
+    fn inc_ref(&self) {
+        // SAFETY: The existence of a shared reference means that the refcount is nonzero.
+        unsafe { bindings::get_pid_ns(self.as_ptr()) };
+    }
+
+    #[inline]
+    unsafe fn dec_ref(obj: ptr::NonNull<PidNamespace>) {
+        // SAFETY: The safety requirements guarantee that the refcount is non-zero.
+        unsafe { bindings::put_pid_ns(obj.cast().as_ptr()) }
+    }
+}
+
+// SAFETY:
+// - `PidNamespace::dec_ref` can be called from any thread.
+// - It is okay to send ownership of `PidNamespace` across thread boundaries.
+unsafe impl Send for PidNamespace {}
+
+// SAFETY: It's OK to access `PidNamespace` through shared references from other threads because
+// we're either accessing properties that don't change or that are properly synchronised by C code.
+unsafe impl Sync for PidNamespace {}
diff --git a/rust/kernel/task.rs b/rust/kernel/task.rs
index 1a36a9f193685393e7211793b6e6dd7576af8bfd..b2d8ced23f963694c7ffb728941aa26555d79e00 100644
--- a/rust/kernel/task.rs
+++ b/rust/kernel/task.rs
@@ -6,7 +6,8 @@
 
 use crate::{
     bindings,
-    types::{NotThreadSafe, Opaque},
+    pid_namespace::PidNamespace,
+    types::{ARef, NotThreadSafe, Opaque},
 };
 use core::{
     cmp::{Eq, PartialEq},
@@ -36,6 +37,16 @@ macro_rules! current {
     };
 }
 
+/// Returns the currently running task's pid namespace.
+#[macro_export]
+macro_rules! current_pid_ns {
+    () => {
+        // SAFETY: Deref + addr-of below create a temporary `PidNamespaceRef` that cannot outlive
+        // the caller.
+        unsafe { &*$crate::task::Task::current_pid_ns() }
+    };
+}
+
 /// Wraps the kernel's `struct task_struct`.
 ///
 /// # Invariants
@@ -145,6 +156,95 @@ fn deref(&self) -> &Self::Target {
         }
     }
 
+    /// Returns a PidNamespace reference for the currently executing task's/thread's pid namespace.
+    ///
+    /// This function can be used to create an unbounded lifetime by e.g., storing the returned
+    /// PidNamespace in a global variable which would be a bug. So the recommended way to get the
+    /// current task's/thread's pid namespace is to use the [`current_pid_ns`] macro because it is
+    /// safe.
+    ///
+    /// # Safety
+    ///
+    /// Callers must ensure that the returned object doesn't outlive the current task/thread.
+    pub unsafe fn current_pid_ns() -> impl Deref<Target = PidNamespace> {
+        struct PidNamespaceRef<'a> {
+            task: &'a PidNamespace,
+            _not_send: NotThreadSafe,
+        }
+
+        impl Deref for PidNamespaceRef<'_> {
+            type Target = PidNamespace;
+
+            fn deref(&self) -> &Self::Target {
+                self.task
+            }
+        }
+
+        // The lifetime of `PidNamespace` is bound to `Task` and `struct pid`.
+        //
+        // The `PidNamespace` of a `Task` doesn't ever change once the `Task` is alive. A
+        // `unshare(CLONE_NEWPID)` or `setns(fd_pidns/pidfd, CLONE_NEWPID)` will not have an effect
+        // on the calling `Task`'s pid namespace. It will only effect the pid namespace of children
+        // created by the calling `Task`. This invariant guarantees that after having acquired a
+        // reference to a `Task`'s pid namespace it will remain unchanged.
+        //
+        // When a task has exited and been reaped `release_task()` will be called. This will set
+        // the `PidNamespace` of the task to `NULL`. So retrieving the `PidNamespace` of a task
+        // that is dead will return `NULL`. Note, that neither holding the RCU lock nor holding a
+        // referencing count to
+        // the `Task` will prevent `release_task()` being called.
+        //
+        // In order to retrieve the `PidNamespace` of a `Task` the `task_active_pid_ns()` function
+        // can be used. There are two cases to consider:
+        //
+        // (1) retrieving the `PidNamespace` of the `current` task
+        // (2) retrieving the `PidNamespace` of a non-`current` task
+        //
+        // From system call context retrieving the `PidNamespace` for case (1) is always safe and
+        // requires neither RCU locking nor a reference count to be held. Retrieving the
+        // `PidNamespace` after `release_task()` for current will return `NULL` but no codepath
+        // like that is exposed to Rust.
+        //
+        // Retrieving the `PidNamespace` from system call context for (2) requires RCU protection.
+        // Accessing `PidNamespace` outside of RCU protection requires a reference count that
+        // must've been acquired while holding the RCU lock. Note that accessing a non-`current`
+        // task means `NULL` can be returned as the non-`current` task could have already passed
+        // through `release_task()`.
+        //
+        // To retrieve (1) the `current_pid_ns!()` macro should be used which ensure that the
+        // returned `PidNamespace` cannot outlive the calling scope. The associated
+        // `current_pid_ns()` function should not be called directly as it could be abused to
+        // created an unbounded lifetime for `PidNamespace`. The `current_pid_ns!()` macro allows
+        // Rust to handle the common case of accessing `current`'s `PidNamespace` without RCU
+        // protection and without having to acquire a reference count.
+        //
+        // For (2) the `task_get_pid_ns()` method must be used. This will always acquire a
+        // reference on `PidNamespace` and will return an `Option` to force the caller to
+        // explicitly handle the case where `PidNamespace` is `None`, something that tends to be
+        // forgotten when doing the equivalent operation in `C`. Missing RCU primitives make it
+        // difficult to perform operations that are otherwise safe without holding a reference
+        // count as long as RCU protection is guaranteed. But it is not important currently. But we
+        // do want it in the future.
+        //
+        // Note for (2) the required RCU protection around calling `task_active_pid_ns()`
+        // synchronizes against putting the last reference of the associated `struct pid` of
+        // `task->thread_pid`. The `struct pid` stored in that field is used to retrieve the
+        // `PidNamespace` of the caller. When `release_task()` is called `task->thread_pid` will be
+        // `NULL`ed and `put_pid()` on said `struct pid` will be delayed in `free_pid()` via
+        // `call_rcu()` allowing everyone with an RCU protected access to the `struct pid` acquired
+        // from `task->thread_pid` to finish.
+        let pidns = unsafe { bindings::task_active_pid_ns(Task::current_raw()) };
+        PidNamespaceRef {
+            // SAFETY: If the current thread is still running, the current task and its associated
+            // pid namespace are valid. `PidNamespaceRef` is not `Send`, so we know it cannot be
+            // transferred to another thread (where it could potentially outlive the current
+            // `Task`). The caller needs to ensure that the PidNamespaceRef doesn't outlive the
+            // current task/thread.
+            task: unsafe { &*PidNamespace::from_ptr(pidns) },
+            _not_send: NotThreadSafe,
+        }
+    }
+
     /// Returns the group leader of the given task.
     pub fn group_leader(&self) -> &Task {
         // SAFETY: By the type invariant, we know that `self.0` is a valid task. Valid tasks always
@@ -182,11 +282,26 @@ pub fn signal_pending(&self) -> bool {
         unsafe { bindings::signal_pending(self.0.get()) != 0 }
     }
 
-    /// Returns the given task's pid in the current pid namespace.
-    pub fn pid_in_current_ns(&self) -> Pid {
-        // SAFETY: We know that `self.0.get()` is valid by the type invariant, and passing a null
-        // pointer as the namespace is correct for using the current namespace.
-        unsafe { bindings::task_tgid_nr_ns(self.0.get(), ptr::null_mut()) }
+    /// Returns task's pid namespace with elevated reference count
+    pub fn get_pid_ns(&self) -> Option<ARef<PidNamespace>> {
+        let ptr = unsafe { bindings::task_get_pid_ns(self.0.get()) };
+        if ptr.is_null() {
+            None
+        } else {
+            // SAFETY: `ptr` is valid by the safety requirements of this function. And we own a
+            // reference count via `task_get_pid_ns()`.
+            // CAST: `Self` is a `repr(transparent)` wrapper around `bindings::pid_namespace`.
+            Some(unsafe { ARef::from_raw(ptr::NonNull::new_unchecked(ptr.cast::<PidNamespace>())) })
+        }
+    }
+
+    /// Returns the given task's pid in the provided pid namespace.
+    #[doc(alias = "task_tgid_nr_ns")]
+    pub fn tgid_nr_ns(&self, pidns: Option<&PidNamespace>) -> Pid {
+        match pidns {
+            Some(pidns) => unsafe { bindings::task_tgid_nr_ns(self.0.get(), pidns.as_ptr()) },
+            None => unsafe { bindings::task_tgid_nr_ns(self.0.get(), ptr::null_mut()) },
+        }
     }
 
     /// Wakes up the task.
