3859a271a0
This marks many critical kernel structures for randomization. These are structures that have been targeted in the past in security exploits, or contain functions pointers, pointers to function pointer tables, lists, workqueues, ref-counters, credentials, permissions, or are otherwise sensitive. This initial list was extracted from Brad Spengler/PaX Team's code in the last public patch of grsecurity/PaX based on my understanding of the code. Changes or omissions from the original code are mine and don't reflect the original grsecurity/PaX code. Left out of this list is task_struct, which requires special handling and will be covered in a subsequent patch. Signed-off-by: Kees Cook <keescook@chromium.org>
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/*
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* procfs namespace bits
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*/
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#ifndef _LINUX_PROC_NS_H
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#define _LINUX_PROC_NS_H
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#include <linux/ns_common.h>
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struct pid_namespace;
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struct nsproxy;
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struct path;
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struct task_struct;
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struct inode;
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struct proc_ns_operations {
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const char *name;
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const char *real_ns_name;
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int type;
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struct ns_common *(*get)(struct task_struct *task);
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void (*put)(struct ns_common *ns);
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int (*install)(struct nsproxy *nsproxy, struct ns_common *ns);
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struct user_namespace *(*owner)(struct ns_common *ns);
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struct ns_common *(*get_parent)(struct ns_common *ns);
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} __randomize_layout;
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extern const struct proc_ns_operations netns_operations;
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extern const struct proc_ns_operations utsns_operations;
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extern const struct proc_ns_operations ipcns_operations;
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extern const struct proc_ns_operations pidns_operations;
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extern const struct proc_ns_operations pidns_for_children_operations;
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extern const struct proc_ns_operations userns_operations;
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extern const struct proc_ns_operations mntns_operations;
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extern const struct proc_ns_operations cgroupns_operations;
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/*
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* We always define these enumerators
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*/
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enum {
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PROC_ROOT_INO = 1,
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PROC_IPC_INIT_INO = 0xEFFFFFFFU,
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PROC_UTS_INIT_INO = 0xEFFFFFFEU,
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PROC_USER_INIT_INO = 0xEFFFFFFDU,
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PROC_PID_INIT_INO = 0xEFFFFFFCU,
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PROC_CGROUP_INIT_INO = 0xEFFFFFFBU,
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};
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#ifdef CONFIG_PROC_FS
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extern int pid_ns_prepare_proc(struct pid_namespace *ns);
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extern void pid_ns_release_proc(struct pid_namespace *ns);
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extern int proc_alloc_inum(unsigned int *pino);
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extern void proc_free_inum(unsigned int inum);
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#else /* CONFIG_PROC_FS */
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static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; }
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static inline void pid_ns_release_proc(struct pid_namespace *ns) {}
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static inline int proc_alloc_inum(unsigned int *inum)
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{
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*inum = 1;
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return 0;
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}
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static inline void proc_free_inum(unsigned int inum) {}
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#endif /* CONFIG_PROC_FS */
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static inline int ns_alloc_inum(struct ns_common *ns)
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{
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atomic_long_set(&ns->stashed, 0);
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return proc_alloc_inum(&ns->inum);
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}
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#define ns_free_inum(ns) proc_free_inum((ns)->inum)
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extern struct file *proc_ns_fget(int fd);
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#define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private)
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extern void *ns_get_path(struct path *path, struct task_struct *task,
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const struct proc_ns_operations *ns_ops);
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extern int ns_get_name(char *buf, size_t size, struct task_struct *task,
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const struct proc_ns_operations *ns_ops);
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extern void nsfs_init(void);
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#endif /* _LINUX_PROC_NS_H */
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