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[v2,0/1] Unprivileged chroot

Message ID 20210310181857.401675-1-mic@digikod.net (mailing list archive)
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Series Unprivileged chroot | expand

Message

Mickaël Salaün March 10, 2021, 6:18 p.m. UTC 
Hi,

This second patch replaces the custom is_path_beneath() with the
existing path_is_under().

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).

This patch is a follow-up of a previous one sent by Andy Lutomirski some
time ago:
https://lore.kernel.org/lkml/0e2f0f54e19bff53a3739ecfddb4ffa9a6dbde4d.1327858005.git.luto@amacapital.net/

This patch can be applied on top of v5.12-rc2 .  I would really
appreciate constructive reviews.

Previous version:
https://lore.kernel.org/r/20210310161000.382796-1-mic@digikod.net

Regards,

Mickaël Salaün (1):
  fs: Allow no_new_privs tasks to call chroot(2)

 fs/open.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)


base-commit: a38fd8748464831584a19438cbb3082b5a2dab15