diff options
| author | Kay Sievers <kay@vrfy.org> | 2013-10-08 01:59:10 +0200 |
|---|---|---|
| committer | Kay Sievers <kay@vrfy.org> | 2013-10-08 02:23:24 +0200 |
| commit | c26547d612733371494330e26c7d3604a5dba3d9 (patch) | |
| tree | 2a89eb3090316bd0c91f3c10aa2b66adc11065dd /src/udev/udev-node.c | |
| parent | 8b197c3a8a57c3f7c231b39e5660856fd9580c80 (diff) | |
udev: support custom Linux Security Module labels for device nodes
Diffstat (limited to 'src/udev/udev-node.c')
| -rw-r--r-- | src/udev/udev-node.c | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/src/udev/udev-node.c b/src/udev/udev-node.c index 1148a1529c..6c9bef331e 100644 --- a/src/udev/udev-node.c +++ b/src/udev/udev-node.c @@ -28,6 +28,9 @@ #include <sys/time.h> #include <sys/stat.h> #include <sys/types.h> +#ifdef HAVE_XATTR +#include <attr/xattr.h> +#endif #include "udev.h" @@ -252,11 +255,13 @@ void udev_node_update_old_links(struct udev_device *dev, struct udev_device *dev } } -static int node_permissions_apply(struct udev_device *dev, bool apply, mode_t mode, uid_t uid, gid_t gid) -{ +static int node_permissions_apply(struct udev_device *dev, bool apply, + mode_t mode, uid_t uid, gid_t gid, + struct udev_list *seclabel_list) { const char *devnode = udev_device_get_devnode(dev); dev_t devnum = udev_device_get_devnum(dev); struct stat stats; + struct udev_list_entry *entry; int err = 0; if (streq(udev_device_get_subsystem(dev), "block")) @@ -285,7 +290,31 @@ static int node_permissions_apply(struct udev_device *dev, bool apply, mode_t mo } else { log_debug("preserve permissions %s, %#o, uid=%u, gid=%u\n", devnode, mode, uid, gid); } + label_fix(devnode, true, false); + + /* apply SECLABEL{$module}=$label */ + udev_list_entry_foreach(entry, udev_list_get_entry(seclabel_list)) { + const char *name, *label; + + name = udev_list_entry_get_name(entry); + label = udev_list_entry_get_value(entry); + + if (streq(name, "selinux")) { + /* FIXME: hook up libselinux */ + log_error("SECLABEL: failed to set selinux label '%s'", label); + + } else if (streq(name, "smack")) { +#ifdef HAVE_XATTR + if (lsetxattr(devnode, "security.SMACK64", label, strlen(label), 0) < 0) + log_error("SECLABEL: failed to set SMACK label '%s'", label); + else + log_debug("SECLABEL: set SMACK label '%s'", label); +#endif + + } else + log_error("SECLABEL: unknown subsystem, ignoring '%s'='%s'", name, label); + } } /* always update timestamp when we re-use the node, like on media change events */ @@ -294,15 +323,16 @@ out: return err; } -void udev_node_add(struct udev_device *dev, bool apply, mode_t mode, uid_t uid, gid_t gid) -{ +void udev_node_add(struct udev_device *dev, bool apply, + mode_t mode, uid_t uid, gid_t gid, + struct udev_list *seclabel_list) { char filename[UTIL_PATH_SIZE]; struct udev_list_entry *list_entry; log_debug("handling device node '%s', devnum=%s, mode=%#o, uid=%d, gid=%d\n", udev_device_get_devnode(dev), udev_device_get_id_filename(dev), mode, uid, gid); - if (node_permissions_apply(dev, apply, mode, uid, gid) < 0) + if (node_permissions_apply(dev, apply, mode, uid, gid, seclabel_list) < 0) return; /* always add /dev/{block,char}/$major:$minor */ |