Mickaël Salaün afe81f7541 landlock: Add ptrace restrictions ... Using ptrace(2) and related debug features on a target process can lead to a privilege escalation. Indeed, ptrace(2) can be used by an attacker to impersonate another task and to remain undetected while performing malicious activities. Thanks to ptrace_may_access(), various part of the kernel can check if a tracer is more privileged than a tracee. A landlocked process has fewer privileges than a non-landlocked process and must then be subject to additional restrictions when manipulating processes. To be allowed to use ptrace(2) and related syscalls on a target process, a landlocked process must have a subset of the target process's rules (i.e. the tracee must be in a sub-domain of the tracer). Cc: James Morris <jmorris@namei.org> Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com> Reviewed-by: Jann Horn <jannh@google.com> Acked-by: Serge Hallyn <serge@hallyn.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210422154123.13086-5-mic@digikod.net Signed-off-by: James Morris <jamorris@linux.microsoft.com>		2021-04-22 12:22:10 -07:00
..
common.h	landlock: Set up the security framework and manage credentials	2021-04-22 12:22:10 -07:00
cred.c	landlock: Set up the security framework and manage credentials	2021-04-22 12:22:10 -07:00
cred.h	landlock: Set up the security framework and manage credentials	2021-04-22 12:22:10 -07:00
Kconfig
limits.h	landlock: Add ruleset and domain management	2021-04-22 12:22:10 -07:00
Makefile	landlock: Add ptrace restrictions	2021-04-22 12:22:10 -07:00
object.c
object.h
ptrace.c	landlock: Add ptrace restrictions	2021-04-22 12:22:10 -07:00
ptrace.h	landlock: Add ptrace restrictions	2021-04-22 12:22:10 -07:00
ruleset.c	landlock: Add ruleset and domain management	2021-04-22 12:22:10 -07:00
ruleset.h	landlock: Add ruleset and domain management	2021-04-22 12:22:10 -07:00
setup.c	landlock: Add ptrace restrictions	2021-04-22 12:22:10 -07:00
setup.h	landlock: Set up the security framework and manage credentials	2021-04-22 12:22:10 -07:00