sshd: look for overlayfs before modifying auth keys #211
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Only looking if the rootfs is in read-only might not be enough, e.g. if the home directory is mounted in RW. Instead, we can simply check in which file-system the authorized_keys file is in: if it is in an overlayfs, it is safe. Note that the '%T' format could be used with stat, but it looks like it is not working with busybox. Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>
arighi
approved these changes
Dec 30, 2024
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Only looking if the rootfs is in read-only might not be enough, e.g. if the home directory is mounted in RW.
Instead, we can simply check in which file-system the authorized_keys file is in: if it is in an overlayfs, it is safe.
Note that the '%T' format could be used with stat, but it looks like it is not working with busybox.