| 1 | #ifndef _LINUX_SECCOMP_H
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| 2 | #define _LINUX_SECCOMP_H
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| 3 |
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| 4 | #include <uapi/linux/seccomp.h>
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| 5 |
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| 6 | #ifdef CONFIG_SECCOMP
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| 7 |
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| 8 | #include <linux/thread_info.h>
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| 9 | #include <asm/seccomp.h>
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| 10 |
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| 11 | struct seccomp_filter;
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| 12 | |
| 13 | * struct seccomp - the state of a seccomp'ed process
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| 14 | *
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| 15 | * @mode: indicates one of the valid values above for controlled
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| 16 | * system calls available to a process.
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| 17 | * @filter: The metadata and ruleset for determining what system calls
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| 18 | * are allowed for a task.
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| 19 | *
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| 20 | * @filter must only be accessed from the context of current as there
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| 21 | * is no locking.
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| 22 |
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| 23 | struct seccomp {
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| 24 | int mode;
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| 25 | struct seccomp_filter *filter;
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| 26 | };
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| 27 |
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| 28 | extern int __secure_computing(int);
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| 29 | static inline int secure_computing(int this_syscall)
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| 30 | {
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| 31 | if (unlikely(test_thread_flag(TIF_SECCOMP)))
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| 32 | return __secure_computing(this_syscall);
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| 33 | return 0;
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| 34 | }
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| 35 |
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| 36 |
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| 37 | static inline void secure_computing_strict(int this_syscall)
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| 38 | {
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| 39 | BUG_ON(secure_computing(this_syscall) != 0);
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| 40 | }
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| 41 |
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| 42 | extern long prctl_get_seccomp(void);
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| 43 | extern long prctl_set_seccomp(unsigned long, char __user *);
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| 44 |
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| 45 | static inline int seccomp_mode(struct seccomp *s)
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| 46 | {
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| 47 | return s->mode;
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| 48 | }
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| 49 |
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| 50 | #else
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| 51 |
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| 52 | #include <linux/errno.h>
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| 53 |
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| 54 | struct seccomp { };
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| 55 | struct seccomp_filter { };
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| 56 |
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| 57 | static inline int secure_computing(int this_syscall) { return 0; }
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| 58 | static inline void secure_computing_strict(int this_syscall) { return; }
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| 59 |
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| 60 | static inline long prctl_get_seccomp(void)
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| 61 | {
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| 62 | return -EINVAL;
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| 63 | }
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| 64 |
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| 65 | static inline long prctl_set_seccomp(unsigned long arg2, char __user *arg3)
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| 66 | {
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| 67 | return -EINVAL;
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| 68 | }
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| 69 |
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| 70 | static inline int seccomp_mode(struct seccomp *s)
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| 71 | {
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| 72 | return 0;
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| 73 | }
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| 74 | #endif
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| 75 |
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| 76 | #ifdef CONFIG_SECCOMP_FILTER
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| 77 | extern void put_seccomp_filter(struct task_struct *tsk);
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| 78 | extern void get_seccomp_filter(struct task_struct *tsk);
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| 79 | #else
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| 80 | static inline void put_seccomp_filter(struct task_struct *tsk)
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| 81 | {
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| 82 | return;
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| 83 | }
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| 84 | static inline void get_seccomp_filter(struct task_struct *tsk)
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| 85 | {
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| 86 | return;
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| 87 | }
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| 88 | #endif
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| 89 | #endif
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