diff options
Diffstat (limited to 'ipc/mqueue.c')
| -rw-r--r-- | ipc/mqueue.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 216cad1ff0d0..7a5a8edc3de3 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -364,8 +364,6 @@ static int mqueue_get_tree(struct fs_context *fc) { struct mqueue_fs_context *ctx = fc->fs_private; - put_user_ns(fc->user_ns); - fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns); fc->s_fs_info = ctx->ipc_ns; return vfs_get_super(fc, vfs_get_keyed_super, mqueue_fill_super); } @@ -374,8 +372,7 @@ static void mqueue_fs_context_free(struct fs_context *fc) { struct mqueue_fs_context *ctx = fc->fs_private; - if (ctx->ipc_ns) - put_ipc_ns(ctx->ipc_ns); + put_ipc_ns(ctx->ipc_ns); kfree(ctx); } @@ -388,6 +385,8 @@ static int mqueue_init_fs_context(struct fs_context *fc) return -ENOMEM; ctx->ipc_ns = get_ipc_ns(current->nsproxy->ipc_ns); + put_user_ns(fc->user_ns); + fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns); fc->fs_private = ctx; fc->ops = &mqueue_fs_context_ops; return 0; @@ -406,6 +405,8 @@ static struct vfsmount *mq_create_mount(struct ipc_namespace *ns) ctx = fc->fs_private; put_ipc_ns(ctx->ipc_ns); ctx->ipc_ns = get_ipc_ns(ns); + put_user_ns(fc->user_ns); + fc->user_ns = get_user_ns(ctx->ipc_ns->user_ns); mnt = fc_mount(fc); put_fs_context(fc); @@ -438,7 +439,6 @@ static void mqueue_evict_inode(struct inode *inode) { struct mqueue_inode_info *info; struct user_struct *user; - unsigned long mq_bytes, mq_treesize; struct ipc_namespace *ipc_ns; struct msg_msg *msg, *nmsg; LIST_HEAD(tmp_msg); @@ -461,16 +461,18 @@ static void mqueue_evict_inode(struct inode *inode) free_msg(msg); } - /* Total amount of bytes accounted for the mqueue */ - mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) + - min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) * - sizeof(struct posix_msg_tree_node); - - mq_bytes = mq_treesize + (info->attr.mq_maxmsg * - info->attr.mq_msgsize); - user = info->user; if (user) { + unsigned long mq_bytes, mq_treesize; + + /* Total amount of bytes accounted for the mqueue */ + mq_treesize = info->attr.mq_maxmsg * sizeof(struct msg_msg) + + min_t(unsigned int, info->attr.mq_maxmsg, MQ_PRIO_MAX) * + sizeof(struct posix_msg_tree_node); + + mq_bytes = mq_treesize + (info->attr.mq_maxmsg * + info->attr.mq_msgsize); + spin_lock(&mq_lock); user->mq_bytes -= mq_bytes; /* |