lkml.org 
[lkml]   [2021]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v3 0/1] Unprivileged chroot
Date
Hi,

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
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/20210310181857.401675-1-mic@digikod.net

Regards,

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

fs/open.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)


base-commit: a38fd8748464831584a19438cbb3082b5a2dab15
--
2.30.2

\
 
 \ /
  Last update: 2021-03-11 11:54    [W:0.045 / U:0.416 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site