c463c0f037
commit 00a02d0c502a06d15e07b857f8ff921e3e402675 upstream If a seccomp user is not interested in Speculative Store Bypass mitigation by default, it can set the new SECCOMP_FILTER_FLAG_SPEC_ALLOW flag when adding filters. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Srivatsa S. Bhat <srivatsa@csail.mit.edu> Reviewed-by: Matt Helsley (VMware) <matt.helsley@gmail.com> Reviewed-by: Alexey Makhalov <amakhalov@vmware.com> Reviewed-by: Bo Gan <ganb@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
#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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/* Valid flags for SECCOMP_SET_MODE_FILTER */
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#define SECCOMP_FILTER_FLAG_TSYNC (1UL << 0)
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/* In v4.14+ SECCOMP_FILTER_FLAG_LOG is (1UL << 1) */
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#define SECCOMP_FILTER_FLAG_SPEC_ALLOW (1UL << 2)
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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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*
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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 0x00000000U /* kill the task immediately */
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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_TRACE 0x7ff00000U /* pass to a tracer or disallow */
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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 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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#endif /* _UAPI_LINUX_SECCOMP_H */
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