diff options
author | orivej <orivej@yandex-team.ru> | 2022-02-10 16:45:01 +0300 |
---|---|---|
committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:01 +0300 |
commit | 2d37894b1b037cf24231090eda8589bbb44fb6fc (patch) | |
tree | be835aa92c6248212e705f25388ebafcf84bc7a1 /contrib/libs/linux-headers/linux/seccomp.h | |
parent | 718c552901d703c502ccbefdfc3c9028d608b947 (diff) | |
download | ydb-2d37894b1b037cf24231090eda8589bbb44fb6fc.tar.gz |
Restoring authorship annotation for <orivej@yandex-team.ru>. Commit 2 of 2.
Diffstat (limited to 'contrib/libs/linux-headers/linux/seccomp.h')
-rw-r--r-- | contrib/libs/linux-headers/linux/seccomp.h | 254 |
1 files changed, 127 insertions, 127 deletions
diff --git a/contrib/libs/linux-headers/linux/seccomp.h b/contrib/libs/linux-headers/linux/seccomp.h index 6d9eb18abe5..02352de7196 100644 --- a/contrib/libs/linux-headers/linux/seccomp.h +++ b/contrib/libs/linux-headers/linux/seccomp.h @@ -1,127 +1,127 @@ -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -#ifndef _LINUX_SECCOMP_H -#define _LINUX_SECCOMP_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 -#define SECCOMP_GET_NOTIF_SIZES 3 - -/* 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) -#define SECCOMP_FILTER_FLAG_NEW_LISTENER (1UL << 3) -#define SECCOMP_FILTER_FLAG_TSYNC_ESRCH (1UL << 4) - -/* - * 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_USER_NOTIF 0x7fc00000U /* notifies userspace */ -#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]; -}; - -struct seccomp_notif_sizes { - __u16 seccomp_notif; - __u16 seccomp_notif_resp; - __u16 seccomp_data; -}; - -struct seccomp_notif { - __u64 id; - __u32 pid; - __u32 flags; - struct seccomp_data data; -}; - -/* - * Valid flags for struct seccomp_notif_resp - * - * Note, the SECCOMP_USER_NOTIF_FLAG_CONTINUE flag must be used with caution! - * If set by the process supervising the syscalls of another process the - * syscall will continue. This is problematic because of an inherent TOCTOU. - * An attacker can exploit the time while the supervised process is waiting on - * a response from the supervising process to rewrite syscall arguments which - * are passed as pointers of the intercepted syscall. - * It should be absolutely clear that this means that the seccomp notifier - * _cannot_ be used to implement a security policy! It should only ever be used - * in scenarios where a more privileged process supervises the syscalls of a - * lesser privileged process to get around kernel-enforced security - * restrictions when the privileged process deems this safe. In other words, - * in order to continue a syscall the supervising process should be sure that - * another security mechanism or the kernel itself will sufficiently block - * syscalls if arguments are rewritten to something unsafe. - * - * Similar precautions should be applied when stacking SECCOMP_RET_USER_NOTIF - * or SECCOMP_RET_TRACE. For SECCOMP_RET_USER_NOTIF filters acting on the - * same syscall, the most recently added filter takes precedence. This means - * that the new SECCOMP_RET_USER_NOTIF filter can override any - * SECCOMP_IOCTL_NOTIF_SEND from earlier filters, essentially allowing all - * such filtered syscalls to be executed by sending the response - * SECCOMP_USER_NOTIF_FLAG_CONTINUE. Note that SECCOMP_RET_TRACE can equally - * be overriden by SECCOMP_USER_NOTIF_FLAG_CONTINUE. - */ -#define SECCOMP_USER_NOTIF_FLAG_CONTINUE (1UL << 0) - -struct seccomp_notif_resp { - __u64 id; - __s64 val; - __s32 error; - __u32 flags; -}; - -#define SECCOMP_IOC_MAGIC '!' -#define SECCOMP_IO(nr) _IO(SECCOMP_IOC_MAGIC, nr) -#define SECCOMP_IOR(nr, type) _IOR(SECCOMP_IOC_MAGIC, nr, type) -#define SECCOMP_IOW(nr, type) _IOW(SECCOMP_IOC_MAGIC, nr, type) -#define SECCOMP_IOWR(nr, type) _IOWR(SECCOMP_IOC_MAGIC, nr, type) - -/* Flags for seccomp notification fd ioctl. */ -#define SECCOMP_IOCTL_NOTIF_RECV SECCOMP_IOWR(0, struct seccomp_notif) -#define SECCOMP_IOCTL_NOTIF_SEND SECCOMP_IOWR(1, \ - struct seccomp_notif_resp) -#define SECCOMP_IOCTL_NOTIF_ID_VALID SECCOMP_IOR(2, __u64) -#endif /* _LINUX_SECCOMP_H */ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _LINUX_SECCOMP_H +#define _LINUX_SECCOMP_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 +#define SECCOMP_GET_NOTIF_SIZES 3 + +/* 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) +#define SECCOMP_FILTER_FLAG_NEW_LISTENER (1UL << 3) +#define SECCOMP_FILTER_FLAG_TSYNC_ESRCH (1UL << 4) + +/* + * 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_USER_NOTIF 0x7fc00000U /* notifies userspace */ +#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]; +}; + +struct seccomp_notif_sizes { + __u16 seccomp_notif; + __u16 seccomp_notif_resp; + __u16 seccomp_data; +}; + +struct seccomp_notif { + __u64 id; + __u32 pid; + __u32 flags; + struct seccomp_data data; +}; + +/* + * Valid flags for struct seccomp_notif_resp + * + * Note, the SECCOMP_USER_NOTIF_FLAG_CONTINUE flag must be used with caution! + * If set by the process supervising the syscalls of another process the + * syscall will continue. This is problematic because of an inherent TOCTOU. + * An attacker can exploit the time while the supervised process is waiting on + * a response from the supervising process to rewrite syscall arguments which + * are passed as pointers of the intercepted syscall. + * It should be absolutely clear that this means that the seccomp notifier + * _cannot_ be used to implement a security policy! It should only ever be used + * in scenarios where a more privileged process supervises the syscalls of a + * lesser privileged process to get around kernel-enforced security + * restrictions when the privileged process deems this safe. In other words, + * in order to continue a syscall the supervising process should be sure that + * another security mechanism or the kernel itself will sufficiently block + * syscalls if arguments are rewritten to something unsafe. + * + * Similar precautions should be applied when stacking SECCOMP_RET_USER_NOTIF + * or SECCOMP_RET_TRACE. For SECCOMP_RET_USER_NOTIF filters acting on the + * same syscall, the most recently added filter takes precedence. This means + * that the new SECCOMP_RET_USER_NOTIF filter can override any + * SECCOMP_IOCTL_NOTIF_SEND from earlier filters, essentially allowing all + * such filtered syscalls to be executed by sending the response + * SECCOMP_USER_NOTIF_FLAG_CONTINUE. Note that SECCOMP_RET_TRACE can equally + * be overriden by SECCOMP_USER_NOTIF_FLAG_CONTINUE. + */ +#define SECCOMP_USER_NOTIF_FLAG_CONTINUE (1UL << 0) + +struct seccomp_notif_resp { + __u64 id; + __s64 val; + __s32 error; + __u32 flags; +}; + +#define SECCOMP_IOC_MAGIC '!' +#define SECCOMP_IO(nr) _IO(SECCOMP_IOC_MAGIC, nr) +#define SECCOMP_IOR(nr, type) _IOR(SECCOMP_IOC_MAGIC, nr, type) +#define SECCOMP_IOW(nr, type) _IOW(SECCOMP_IOC_MAGIC, nr, type) +#define SECCOMP_IOWR(nr, type) _IOWR(SECCOMP_IOC_MAGIC, nr, type) + +/* Flags for seccomp notification fd ioctl. */ +#define SECCOMP_IOCTL_NOTIF_RECV SECCOMP_IOWR(0, struct seccomp_notif) +#define SECCOMP_IOCTL_NOTIF_SEND SECCOMP_IOWR(1, \ + struct seccomp_notif_resp) +#define SECCOMP_IOCTL_NOTIF_ID_VALID SECCOMP_IOR(2, __u64) +#endif /* _LINUX_SECCOMP_H */ |