0f09c88f20
[ Upstream commit47e33c05f9] When SECCOMP_IOCTL_NOTIF_ID_VALID was first introduced it had the wrong direction flag set. While this isn't a big deal as nothing currently enforces these bits in the kernel, it should be defined correctly. Fix the define and provide support for the old command until it is no longer needed for backward compatibility. Fixes:6a21cc50f0("seccomp: add a return code to trap to userspace") Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_LINUX_SECCOMP_H
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#define _UAPI_LINUX_SECCOMP_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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/* Valid values for seccomp.mode and prctl(PR_SET_SECCOMP, <mode>) */
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#define SECCOMP_MODE_DISABLED 0 /* seccomp is not in use. */
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#define SECCOMP_MODE_STRICT 1 /* uses hard-coded filter. */
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#define SECCOMP_MODE_FILTER 2 /* uses user-supplied filter. */
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/* Valid operations for seccomp syscall. */
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#define SECCOMP_SET_MODE_STRICT 0
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#define SECCOMP_SET_MODE_FILTER 1
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#define SECCOMP_GET_ACTION_AVAIL 2
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#define SECCOMP_GET_NOTIF_SIZES 3
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/* Valid flags for SECCOMP_SET_MODE_FILTER */
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#define SECCOMP_FILTER_FLAG_TSYNC (1UL << 0)
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#define SECCOMP_FILTER_FLAG_LOG (1UL << 1)
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#define SECCOMP_FILTER_FLAG_SPEC_ALLOW (1UL << 2)
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#define SECCOMP_FILTER_FLAG_NEW_LISTENER (1UL << 3)
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/*
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* All BPF programs must return a 32-bit value.
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* The bottom 16-bits are for optional return data.
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* The upper 16-bits are ordered from least permissive values to most,
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* as a signed value (so 0x8000000 is negative).
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*
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* The ordering ensures that a min_t() over composed return values always
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* selects the least permissive choice.
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*/
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#define SECCOMP_RET_KILL_PROCESS 0x80000000U /* kill the process */
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#define SECCOMP_RET_KILL_THREAD 0x00000000U /* kill the thread */
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#define SECCOMP_RET_KILL SECCOMP_RET_KILL_THREAD
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#define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */
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#define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */
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#define SECCOMP_RET_USER_NOTIF 0x7fc00000U /* notifies userspace */
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#define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */
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#define SECCOMP_RET_LOG 0x7ffc0000U /* allow after logging */
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#define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */
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/* Masks for the return value sections. */
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#define SECCOMP_RET_ACTION_FULL 0xffff0000U
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#define SECCOMP_RET_ACTION 0x7fff0000U
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#define SECCOMP_RET_DATA 0x0000ffffU
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/**
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* struct seccomp_data - the format the BPF program executes over.
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* @nr: the system call number
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* @arch: indicates system call convention as an AUDIT_ARCH_* value
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* as defined in <linux/audit.h>.
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* @instruction_pointer: at the time of the system call.
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* @args: up to 6 system call arguments always stored as 64-bit values
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* regardless of the architecture.
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*/
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struct seccomp_data {
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int nr;
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__u32 arch;
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__u64 instruction_pointer;
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__u64 args[6];
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};
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struct seccomp_notif_sizes {
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__u16 seccomp_notif;
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__u16 seccomp_notif_resp;
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__u16 seccomp_data;
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};
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struct seccomp_notif {
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__u64 id;
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__u32 pid;
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__u32 flags;
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struct seccomp_data data;
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};
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struct seccomp_notif_resp {
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__u64 id;
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__s64 val;
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__s32 error;
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__u32 flags;
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};
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#define SECCOMP_IOC_MAGIC '!'
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#define SECCOMP_IO(nr) _IO(SECCOMP_IOC_MAGIC, nr)
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#define SECCOMP_IOR(nr, type) _IOR(SECCOMP_IOC_MAGIC, nr, type)
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#define SECCOMP_IOW(nr, type) _IOW(SECCOMP_IOC_MAGIC, nr, type)
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#define SECCOMP_IOWR(nr, type) _IOWR(SECCOMP_IOC_MAGIC, nr, type)
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/* Flags for seccomp notification fd ioctl. */
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#define SECCOMP_IOCTL_NOTIF_RECV SECCOMP_IOWR(0, struct seccomp_notif)
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#define SECCOMP_IOCTL_NOTIF_SEND SECCOMP_IOWR(1, \
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struct seccomp_notif_resp)
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#define SECCOMP_IOCTL_NOTIF_ID_VALID SECCOMP_IOW(2, __u64)
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#endif /* _UAPI_LINUX_SECCOMP_H */
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