cregit-Linux how code gets into the kernel

Release 4.17 include/uapi/linux/seccomp.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_SECCOMP_H

#define _UAPI_LINUX_SECCOMP_H

#include <linux/compiler.h>
#include <linux/types.h>


/* Valid values for seccomp.mode and prctl(PR_SET_SECCOMP, <mode>) */

#define SECCOMP_MODE_DISABLED	0 
/* seccomp is not in use. */

#define SECCOMP_MODE_STRICT	1 
/* uses hard-coded filter. */

#define SECCOMP_MODE_FILTER	2 
/* uses user-supplied filter. */

/* Valid operations for seccomp syscall. */

#define SECCOMP_SET_MODE_STRICT		0

#define SECCOMP_SET_MODE_FILTER		1

#define SECCOMP_GET_ACTION_AVAIL	2

/* Valid flags for SECCOMP_SET_MODE_FILTER */

#define SECCOMP_FILTER_FLAG_TSYNC	(1UL << 0)

#define SECCOMP_FILTER_FLAG_LOG		(1UL << 1)

#define SECCOMP_FILTER_FLAG_SPEC_ALLOW	(1UL << 2)

/*
 * All BPF programs must return a 32-bit value.
 * The bottom 16-bits are for optional return data.
 * The upper 16-bits are ordered from least permissive values to most,
 * as a signed value (so 0x8000000 is negative).
 *
 * The ordering ensures that a min_t() over composed return values always
 * selects the least permissive choice.
 */

#define SECCOMP_RET_KILL_PROCESS 0x80000000U 
/* kill the process */

#define SECCOMP_RET_KILL_THREAD	 0x00000000U 
/* kill the thread */

#define SECCOMP_RET_KILL	 SECCOMP_RET_KILL_THREAD

#define SECCOMP_RET_TRAP	 0x00030000U 
/* disallow and force a SIGSYS */

#define SECCOMP_RET_ERRNO	 0x00050000U 
/* returns an errno */

#define SECCOMP_RET_TRACE	 0x7ff00000U 
/* pass to a tracer or disallow */

#define SECCOMP_RET_LOG		 0x7ffc0000U 
/* allow after logging */

#define SECCOMP_RET_ALLOW	 0x7fff0000U 
/* allow */

/* Masks for the return value sections. */

#define SECCOMP_RET_ACTION_FULL	0xffff0000U

#define SECCOMP_RET_ACTION	0x7fff0000U

#define SECCOMP_RET_DATA	0x0000ffffU

/**
 * struct seccomp_data - the format the BPF program executes over.
 * @nr: the system call number
 * @arch: indicates system call convention as an AUDIT_ARCH_* value
 *        as defined in <linux/audit.h>.
 * @instruction_pointer: at the time of the system call.
 * @args: up to 6 system call arguments always stored as 64-bit values
 *        regardless of the architecture.
 */

struct seccomp_data {
	
int nr;
	
__u32 arch;
	
__u64 instruction_pointer;
	
__u64 args[6];
};

#endif /* _UAPI_LINUX_SECCOMP_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
David Howells8463.64%19.09%
Kees Cook3526.52%654.55%
Tyler Hicks129.09%327.27%
Greg Kroah-Hartman10.76%19.09%
Total132100.00%11100.00%
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