[pull] main from containerd:main#255
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pull[bot] merged 5 commits intomeonBot:mainfrom Feb 26, 2026
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Signed-off-by: Akhil Mohan <akhilerm@gmail.com>
…ead of values The loop `for flag := range unprivilegedFlags` iterates over slice indices (0,1,2,3,4,5,6) rather than the actual flag values (MS_RDONLY, MS_NODEV, etc). This was a porting error from moby/moby where the data structure was a map (where `for k := range m` yields keys/values). As a result, MS_NOEXEC, MS_NOATIME, MS_RELATIME, and MS_NODIRATIME are never detected or preserved. In user namespaces, this causes bind-mount remounts to fail with EPERM when any of these flags are locked on the parent mount, because the kernel requires all CL_UNPRIVILEGED locked flags to be preserved during remount. MS_RDONLY (0x1), MS_NOSUID (0x2), and MS_NODEV (0x4) happened to work by coincidence because their values equal low index numbers. Fix by using `for _, flag := range` to iterate over values. Signed-off-by: Luke Hinds <luke@stacklok.com>
Mounts a tmpfs with MS_NOEXEC, MS_NOATIME, and MS_NODIRATIME and verifies that getUnprivilegedMountFlags detects all of them. These three flags were the ones missed by the range-over-indices bug. Also verifies that flags not present on the mount (MS_NOSUID, MS_NODEV, MS_RDONLY) are not falsely reported. Signed-off-by: Luke Hinds <luke@stacklok.com>
core/mount: fix getUnprivilegedMountFlags iterating over indices instead of values
ci: fix critools version used in windows tests
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