65b38851a1
The usage of pid_ns->child_reaper->nsproxy->net_ns in nfs_server_list_open and nfs_client_list_open is not safe. /proc for a pid namespace can remain mounted after the all of the process in that pid namespace have exited. There are also times before the initial process in a pid namespace has started or after the initial process in a pid namespace has exited where pid_ns->child_reaper can be NULL or stale. Making the idiom pid_ns->child_reaper->nsproxy a double whammy of problems. Luckily all that needs to happen is to move /proc/fs/nfsfs/servers and /proc/fs/nfsfs/volumes under /proc/net to /proc/net/nfsfs/servers and /proc/net/nfsfs/volumes and add a symlink from the original location, and to use seq_open_net as it has been designed. Cc: stable@vger.kernel.org Cc: Trond Myklebust <trond.myklebust@primarydata.com> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
39 lines
878 B
C
39 lines
878 B
C
/*
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* NFS-private data for each "struct net". Accessed with net_generic().
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*/
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#ifndef __NFS_NETNS_H__
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#define __NFS_NETNS_H__
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#include <linux/nfs4.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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struct bl_dev_msg {
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int32_t status;
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uint32_t major, minor;
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};
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struct nfs_net {
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struct cache_detail *nfs_dns_resolve;
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struct rpc_pipe *bl_device_pipe;
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struct bl_dev_msg bl_mount_reply;
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wait_queue_head_t bl_wq;
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struct list_head nfs_client_list;
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struct list_head nfs_volume_list;
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#if IS_ENABLED(CONFIG_NFS_V4)
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struct idr cb_ident_idr; /* Protected by nfs_client_lock */
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unsigned short nfs_callback_tcpport;
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unsigned short nfs_callback_tcpport6;
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int cb_users[NFS4_MAX_MINOR_VERSION + 1];
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#endif
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spinlock_t nfs_client_lock;
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struct timespec boot_time;
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *proc_nfsfs;
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#endif
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};
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extern int nfs_net_id;
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#endif
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