lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 14 Feb 2020 19:35:31 +0100 From: Christian Brauner <christian.brauner@...ntu.com> To: Stéphane Graber <stgraber@...ntu.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Aleksa Sarai <cyphar@...har.com>, Jann Horn <jannh@...gle.com> Cc: smbarber@...omium.org, Seth Forshee <seth.forshee@...onical.com>, Alexander Viro <viro@...iv.linux.org.uk>, Alexey Dobriyan <adobriyan@...il.com>, Serge Hallyn <serge@...lyn.com>, James Morris <jmorris@...ei.org>, Kees Cook <keescook@...omium.org>, Jonathan Corbet <corbet@....net>, Phil Estes <estesp@...il.com>, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, containers@...ts.linux-foundation.org, linux-security-module@...r.kernel.org, linux-api@...r.kernel.org, Christian Brauner <christian.brauner@...ntu.com> Subject: [PATCH v2 05/28] proc: task_state(): use from_kfs{g,u}id_munged If fsid mappings have been written, this will cause proc to look at fsid mappings for the user namespace. If no fsid mappings have been written the behavior is as before. Here is part of the output from /proc/<pid>/status from the initial user namespace for systemd running in an unprivileged container as user namespace root with id mapping 0 100000 100000 and fsid mapping 0 300000 100000: Name: systemd Umask: 0000 State: S (sleeping) Tgid: 13023 Ngid: 0 Pid: 13023 PPid: 13008 TracerPid: 0 Uid: 100000 100000 100000 300000 Gid: 100000 100000 100000 300000 FDSize: 64 Groups: Signed-off-by: Christian Brauner <christian.brauner@...ntu.com> --- /* v2 */ unchanged --- fs/proc/array.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/proc/array.c b/fs/proc/array.c index 5efaf3708ec6..d4a04f85a67e 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -91,6 +91,7 @@ #include <linux/string_helpers.h> #include <linux/user_namespace.h> #include <linux/fs_struct.h> +#include <linux/fsuidgid.h> #include <asm/pgtable.h> #include <asm/processor.h> @@ -193,11 +194,11 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns, seq_put_decimal_ull(m, "\nUid:\t", from_kuid_munged(user_ns, cred->uid)); seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->euid)); seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->suid)); - seq_put_decimal_ull(m, "\t", from_kuid_munged(user_ns, cred->fsuid)); + seq_put_decimal_ull(m, "\t", from_kfsuid_munged(user_ns, cred->fsuid)); seq_put_decimal_ull(m, "\nGid:\t", from_kgid_munged(user_ns, cred->gid)); seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->egid)); seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->sgid)); - seq_put_decimal_ull(m, "\t", from_kgid_munged(user_ns, cred->fsgid)); + seq_put_decimal_ull(m, "\t", from_kfsgid_munged(user_ns, cred->fsgid)); seq_put_decimal_ull(m, "\nFDSize:\t", max_fds); seq_puts(m, "\nGroups:\t"); -- 2.25.0
Powered by blists - more mailing lists