diff options
Diffstat (limited to 'net/ax25/ax25_uid.c')
| -rw-r--r-- | net/ax25/ax25_uid.c | 60 |
1 files changed, 24 insertions, 36 deletions
diff --git a/net/ax25/ax25_uid.c b/net/ax25/ax25_uid.c index 832bcf092a0..71c4badbc80 100644 --- a/net/ax25/ax25_uid.c +++ b/net/ax25/ax25_uid.c @@ -18,6 +18,7 @@ #include <linux/sockios.h> #include <linux/net.h> #include <linux/spinlock.h> +#include <linux/slab.h> #include <net/ax25.h> #include <linux/inet.h> #include <linux/netdevice.h> @@ -25,7 +26,6 @@ #include <linux/skbuff.h> #include <net/sock.h> #include <asm/uaccess.h> -#include <asm/system.h> #include <linux/fcntl.h> #include <linux/mm.h> #include <linux/interrupt.h> @@ -36,6 +36,7 @@ #include <linux/stat.h> #include <linux/netfilter.h> #include <linux/sysctl.h> +#include <linux/export.h> #include <net/ip.h> #include <net/arp.h> @@ -50,14 +51,13 @@ int ax25_uid_policy; EXPORT_SYMBOL(ax25_uid_policy); -ax25_uid_assoc *ax25_findbyuid(uid_t uid) +ax25_uid_assoc *ax25_findbyuid(kuid_t uid) { ax25_uid_assoc *ax25_uid, *res = NULL; - struct hlist_node *node; read_lock(&ax25_uid_lock); - ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) { - if (ax25_uid->uid == uid) { + ax25_uid_for_each(ax25_uid, &ax25_uid_list) { + if (uid_eq(ax25_uid->uid, uid)) { ax25_uid_hold(ax25_uid); res = ax25_uid; break; @@ -73,7 +73,6 @@ EXPORT_SYMBOL(ax25_findbyuid); int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax) { ax25_uid_assoc *ax25_uid; - struct hlist_node *node; ax25_uid_assoc *user; unsigned long res; @@ -81,9 +80,9 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax) case SIOCAX25GETUID: res = -ENOENT; read_lock(&ax25_uid_lock); - ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) { + ax25_uid_for_each(ax25_uid, &ax25_uid_list) { if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) { - res = ax25_uid->uid; + res = from_kuid_munged(current_user_ns(), ax25_uid->uid); break; } } @@ -92,9 +91,14 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax) return res; case SIOCAX25ADDUID: + { + kuid_t sax25_kuid; if (!capable(CAP_NET_ADMIN)) return -EPERM; - user = ax25_findbyuid(sax->sax25_uid); + sax25_kuid = make_kuid(current_user_ns(), sax->sax25_uid); + if (!uid_valid(sax25_kuid)) + return -EINVAL; + user = ax25_findbyuid(sax25_kuid); if (user) { ax25_uid_put(user); return -EEXIST; @@ -105,7 +109,7 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax) return -ENOMEM; atomic_set(&ax25_uid->refcount, 1); - ax25_uid->uid = sax->sax25_uid; + ax25_uid->uid = sax25_kuid; ax25_uid->call = sax->sax25_call; write_lock(&ax25_uid_lock); @@ -113,14 +117,14 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax) write_unlock(&ax25_uid_lock); return 0; - + } case SIOCAX25DELUID: if (!capable(CAP_NET_ADMIN)) return -EPERM; ax25_uid = NULL; write_lock(&ax25_uid_lock); - ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) { + ax25_uid_for_each(ax25_uid, &ax25_uid_list) { if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) break; } @@ -146,31 +150,13 @@ int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax) static void *ax25_uid_seq_start(struct seq_file *seq, loff_t *pos) __acquires(ax25_uid_lock) { - struct ax25_uid_assoc *pt; - struct hlist_node *node; - int i = 1; - read_lock(&ax25_uid_lock); - - if (*pos == 0) - return SEQ_START_TOKEN; - - ax25_uid_for_each(pt, node, &ax25_uid_list) { - if (i == *pos) - return pt; - ++i; - } - return NULL; + return seq_hlist_start_head(&ax25_uid_list, *pos); } static void *ax25_uid_seq_next(struct seq_file *seq, void *v, loff_t *pos) { - ++*pos; - if (v == SEQ_START_TOKEN) - return ax25_uid_list.first; - else - return hlist_entry(((ax25_uid_assoc *)v)->uid_node.next, - ax25_uid_assoc, uid_node); + return seq_hlist_next(v, &ax25_uid_list, pos); } static void ax25_uid_seq_stop(struct seq_file *seq, void *v) @@ -186,9 +172,12 @@ static int ax25_uid_seq_show(struct seq_file *seq, void *v) if (v == SEQ_START_TOKEN) seq_printf(seq, "Policy: %d\n", ax25_uid_policy); else { - struct ax25_uid_assoc *pt = v; + struct ax25_uid_assoc *pt; - seq_printf(seq, "%6d %s\n", pt->uid, ax2asc(buf, &pt->call)); + pt = hlist_entry(v, struct ax25_uid_assoc, uid_node); + seq_printf(seq, "%6d %s\n", + from_kuid_munged(seq_user_ns(seq), pt->uid), + ax2asc(buf, &pt->call)); } return 0; } @@ -221,11 +210,10 @@ const struct file_operations ax25_uid_fops = { void __exit ax25_uid_free(void) { ax25_uid_assoc *ax25_uid; - struct hlist_node *node; write_lock(&ax25_uid_lock); again: - ax25_uid_for_each(ax25_uid, node, &ax25_uid_list) { + ax25_uid_for_each(ax25_uid, &ax25_uid_list) { hlist_del_init(&ax25_uid->uid_node); ax25_uid_put(ax25_uid); goto again; |