| 2509bdc8 | 07-Apr-2026 |
Ricardo B. Marlière <rbm@suse.com> |
selftests/namespaces: Skip efault tests when listns() is not available
When listns() is not implemented the iterator child detects ENOSYS and
exits cleanly with status PIDFD_SKIP before the parent h
selftests/namespaces: Skip efault tests when listns() is not available
When listns() is not implemented the iterator child detects ENOSYS and
exits cleanly with status PIDFD_SKIP before the parent has a chance to
signal it. The parent sends SIGKILL (which is a harmless no-op at that
point) and then calls waitpid(), obtaining a normal-exit status. The
subsequent ASSERT_TRUE(WIFSIGNALED(status)) therefore fails, causing the
three EFAULT-focused tests to report FAIL rather than SKIP on kernels that
do not yet carry listns() support.
After collecting the iterator's exit status, check whether it exited with
PIDFD_SKIP and issue a SKIP verdict in that case, consistent with the
behaviour of every other listns test that already handles ENOSYS correctly.
Signed-off-by: Ricardo B. Marlière <rbm@suse.com>
Link: https://patch.msgid.link/20260407-selftests-namespaces_fixes-v1-3-59109909d88b@suse.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| f36ddf93 | 07-Apr-2026 |
Ricardo B. Marlière <rbm@suse.com> |
selftests/namespaces: Fix waitpid race in listns_efault_test cleanup
The efault tests spawn two categories of child processes: namespace
children (each in its own mount namespace, for concurrent des
selftests/namespaces: Fix waitpid race in listns_efault_test cleanup
The efault tests spawn two categories of child processes: namespace
children (each in its own mount namespace, for concurrent destruction) and
an iterator child that calls listns() in a tight loop. The cleanup loop
used waitpid(-1), which reaps any child in any order. If the iterator child
exits early (e.g. because listns() returned ENOSYS) before all namespace
children have been reaped, waitpid(-1) may consume it instead. The
subsequent targeted waitpid(iter_pid) would then block indefinitely.
Track the PIDs of the namespace children explicitly and use targeted
waitpid() calls in the cleanup loop so the iterator child cannot be
inadvertently reaped during namespace cleanup.
Signed-off-by: Ricardo B. Marlière <rbm@suse.com>
Link: https://patch.msgid.link/20260407-selftests-namespaces_fixes-v1-2-59109909d88b@suse.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 07d7ad46 | 09-Nov-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: test for efault
Ensure that put_user() can fail and that namespace cleanup works
correctly.
Link: https://patch.msgid.link/20251109-namespace-6-19-fixes-v1-8-ae8a4ad5a3b3@kern
selftests/namespaces: test for efault
Ensure that put_user() can fail and that namespace cleanup works
correctly.
Link: https://patch.msgid.link/20251109-namespace-6-19-fixes-v1-8-ae8a4ad5a3b3@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 2cc1c01f | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespace: test listns() pagination
Minimal test case to reproduce KASAN out-of-bounds in listns pagination.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-72-2e6
selftests/namespace: test listns() pagination
Minimal test case to reproduce KASAN out-of-bounds in listns pagination.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-72-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| fc858856 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespace: add stress test
Stress tests for namespace active reference counting.
These tests validate that the active reference counting system can
handle high load scenarios including ra
selftests/namespace: add stress test
Stress tests for namespace active reference counting.
These tests validate that the active reference counting system can
handle high load scenarios including rapid namespace
creation/destruction, large numbers of concurrent namespaces, and
various edge cases under stress.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-71-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| d18cf3f9 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespace: commit_creds() active reference tests
Test credential changes and their impact on namespace active references.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-lis
selftests/namespace: commit_creds() active reference tests
Test credential changes and their impact on namespace active references.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-70-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 80fedf81 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespace: third threaded active reference count test
Test that namespaces become inactive after subprocess with multiple
threads exits. Create a subprocess that unshares user and network
selftests/namespace: third threaded active reference count test
Test that namespaces become inactive after subprocess with multiple
threads exits. Create a subprocess that unshares user and network
namespaces, then creates two threads that share those namespaces. Verify
that after all threads and subprocess exit, the namespaces are no longer
listed by listns() and cannot be opened by open_by_handle_at().
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-69-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| ee861032 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespace: second threaded active reference count test
Test that a namespace remains active while a thread holds an fd to it.
Even after the thread exits, the namespace should remain activ
selftests/namespace: second threaded active reference count test
Test that a namespace remains active while a thread holds an fd to it.
Even after the thread exits, the namespace should remain active as long
as another thread holds a file descriptor to it.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-68-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 29f083c4 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespace: first threaded active reference count test
Test that namespace becomes inactive after thread exits. This verifies
active reference counting works with threads, not just processe
selftests/namespace: first threaded active reference count test
Test that namespace becomes inactive after thread exits. This verifies
active reference counting works with threads, not just processes.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-67-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| c89d100f | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: twelth inactive namespace resurrection test
Test multi-level namespace resurrection across three user namespace levels.
This test creates a complex namespace hierarchy with th
selftests/namespaces: twelth inactive namespace resurrection test
Test multi-level namespace resurrection across three user namespace levels.
This test creates a complex namespace hierarchy with three levels of user
namespaces and a network namespace at the deepest level. It verifies that
the resurrection semantics work correctly when SIOCGSKNS is called on a
socket from an inactive namespace tree, and that listns() and
open_by_handle_at() correctly respect visibility rules.
Hierarchy after child processes exit (all with 0 active refcount):
net_L3A (0) <- Level 3 network namespace
|
+
userns_L3 (0) <- Level 3 user namespace
|
+
userns_L2 (0) <- Level 2 user namespace
|
+
userns_L1 (0) <- Level 1 user namespace
|
x
init_user_ns
The test verifies:
1. SIOCGSKNS on a socket from inactive net_L3A resurrects the entire chain
2. After resurrection, all namespaces are visible in listns()
3. Resurrected namespaces can be reopened via file handles
4. Closing the netns FD cascades down: the entire ownership chain
(userns_L3 -> userns_L2 -> userns_L1) becomes inactive again
5. Inactive namespaces disappear from listns() and cannot be reopened
6. Calling SIOCGSKNS again on the same socket resurrects the tree again
7. After second resurrection, namespaces are visible and can be reopened
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-66-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| c80168b6 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: eleventh inactive namespace resurrection test
Test combined listns() and file handle operations with socket-kept
netns. Create a netns, keep it alive with a socket, verify it a
selftests/namespaces: eleventh inactive namespace resurrection test
Test combined listns() and file handle operations with socket-kept
netns. Create a netns, keep it alive with a socket, verify it appears in
listns(), then reopen it via file handle obtained from listns() entry.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-65-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 3798991a | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: tenth inactive namespace resurrection test
Test that socket-kept netns can be reopened via file handle.
Verify that a network namespace kept alive by a socket FD can be
reopene
selftests/namespaces: tenth inactive namespace resurrection test
Test that socket-kept netns can be reopened via file handle.
Verify that a network namespace kept alive by a socket FD can be
reopened using file handles even after the creating process exits.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-64-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| b9d09f56 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: ninth inactive namespace resurrection test
Test that socket-kept netns appears in listns() output.
Verify that a network namespace kept alive by a socket FD appears in
listns()
selftests/namespaces: ninth inactive namespace resurrection test
Test that socket-kept netns appears in listns() output.
Verify that a network namespace kept alive by a socket FD appears in
listns() output even after the creating process exits, and that it
disappears when the socket is closed.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-63-2e6f823ebdc0@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 6de17ec3 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: eigth inactive namespace resurrection test
Test IPv6 sockets also work with SIOCGSKNS.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-62-2e6f823ebdc0@
selftests/namespaces: eigth inactive namespace resurrection test
Test IPv6 sockets also work with SIOCGSKNS.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-62-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 54a29d12 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: seventh inactive namespace resurrection test
Test socket keeps netns active after creating process exits. Verify that
as long as the socket FD exists, the namespace remains act
selftests/namespaces: seventh inactive namespace resurrection test
Test socket keeps netns active after creating process exits. Verify that
as long as the socket FD exists, the namespace remains active.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-61-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| aec22376 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: sixth inactive namespace resurrection test
Test multiple sockets keep the same network namespace active. Create
multiple sockets, verify closing some doesn't affect others.
Li
selftests/namespaces: sixth inactive namespace resurrection test
Test multiple sockets keep the same network namespace active. Create
multiple sockets, verify closing some doesn't affect others.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-60-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 2b9fa5bf | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: fifth inactive namespace resurrection test
Test SIOCGSKNS fails on non-socket file descriptors.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-59-2e6f
selftests/namespaces: fifth inactive namespace resurrection test
Test SIOCGSKNS fails on non-socket file descriptors.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-59-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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| 40226da4 | 29-Oct-2025 |
Christian Brauner <brauner@kernel.org> |
selftests/namespaces: fourth inactive namespace resurrection test
Test SIOCGSKNS across setns. Create a socket in netns A, switch to netns
B, verify SIOCGSKNS still returns netns A.
Link: https://p
selftests/namespaces: fourth inactive namespace resurrection test
Test SIOCGSKNS across setns. Create a socket in netns A, switch to netns
B, verify SIOCGSKNS still returns netns A.
Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-58-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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