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Previously, if pid == 0 and we're PID 1, get_process_ppid()
would set ret to getppid(), i.e. 0, which is inconsistent
when pid is explicitly set to 1. Ensure we always handle
such case by returning -EADDRNOTAVAIL.
/dev/null is a character device, so same_fd() in the fallback path
that compares fstat will fail, as that bails out if the fd refers
to a char device. This happens on kernels without F_DUPFD_QUERY and
without kcmp.
/* test_same_fd */
Assertion 'same_fd(d, e) > 0' failed at src/test/test-fd-util.c:111, function test_same_fd(). Aborting.
Fixes#35552
To reproduce, as an unprivileged user start a docker container and build
and run the unit tests inside it:
$ docker run --rm -ti debian:bookworm bash
...
/* test_close_all_fds */
Successfully forked off '(caf-plain)' as PID 10496.
Skipping PR_SET_MM, as we don't have privileges.
(caf-plain) succeeded.
Failed to fork off '(caf-noproc)': Operation not permitted
Assertion 'r >= 0' failed at src/test/test-fd-util.c:392, function test_close_all_fds(). Aborting.
Partially fixes#35552
have ambient caps: yes
Capabilities:cap_chown,cap_dac_override,cap_fowner,cap_fsetid,cap_kill,cap_setgid,cap_setuid,cap_setpcap,cap_net_bind_service,cap_net_raw,cap_sys_chroot,cap_mknod,cap_audit_write,cap_setfcap=ep
Failed to drop auxiliary groups list: Operation not permitted
Failed to change group ID: Operation not permitted
Capabilities:cap_dac_override,cap_net_raw=ep
Capabilities:cap_dac_override=ep
Successfully forked off '(getambient)' as PID 12505.
Skipping PR_SET_MM, as we don't have privileges.
Ambient capability cap_linux_immutable requested but missing from bounding set, suppressing automatically.
Assertion 'x < 0 || FLAGS_SET(c, UINT64_C(1) << CAP_LINUX_IMMUTABLE)' failed at src/test/test-capability.c:273, function test_capability_get_ambient(). Aborting.
(getambient) terminated by signal ABRT.
src/test/test-capability.c:258: Assertion failed: expected "r" to succeed, but got error: Protocol error
Partially fixes#35552
TEST-75-RESOLVED fails on Ubuntu autopkgtest due to this warning from
knot:
notice: config, policy 'auto_rollover_nsec3' depends on default nsec3-salt-length=8, since version 3.5 the default becomes 0
Explicitly set nsec3-salt-length=8 to silence.
No functional change, as when this function is called, the set will be
freed and contained Route objects will be unref()ed anyway soon later
by nexthop_detach() -> nexthop_free().
Even though, when the routes are forgotten from the Manager, then it is
not necessary to keep them by the nexthop. Let's unref earlier.
Otherwise, these may be freed twice.
But, fortunately, when this function is called, both are NULL.
So, this should not change any behavior. But for safety.
This PR allows an option for systemd exec units to enable UTS namespaces
but not restrict changing hostname via seccomp. Thus, units can change
hostname without affecting the host. This is useful for OS-like
containers running as units where they should have freedom to change
their container hostname if they want, but not the host's hostname.
Fixes: #30348
RestrictNamespaces= would accept "time" but would not actually apply
seccomp filters e.g. systemd-run -p RestrictNamespaces=time unshare -T true
should fail but it succeeded.
This commit actually enables time namespace seccomp filtering.
