[PATCH v3 0/1] Unprivileged chroot
mic at digikod.net
Thu Mar 11 10:52:41 UTC 2021
This new patch replaces the path_is_under() check with
current_chrooted() as it is done with user namespaces. Indeed, it is
much more simple to check the current root instead of limiting access to
a subset of files.
The chroot system call is currently limited to be used by processes with
the CAP_SYS_CHROOT capability. This protects against malicious
procesess willing to trick SUID-like binaries. The following patch
allows unprivileged users to safely use chroot(2), which may be
complementary to the use of user namespaces.
This patch is a follow-up of a previous one sent by Andy Lutomirski some
This patch can be applied on top of v5.12-rc2 . I would really
appreciate constructive reviews.
Mickaël Salaün (1):
fs: Allow no_new_privs tasks to call chroot(2)
fs/open.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
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