cregit-Linux how code gets into the kernel

Release 4.7 security/keys/compat.c

Directory: security/keys
/* 32-bit compatibility syscall for 64-bit systems
 *
 * Copyright (C) 2004-5 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/syscalls.h>
#include <linux/keyctl.h>
#include <linux/compat.h>
#include <linux/slab.h>
#include "internal.h"

/*
 * Instantiate a key with the specified compatibility multipart payload and
 * link the key into the destination keyring if one is given.
 *
 * The caller must have the appropriate instantiation permit set for this to
 * work (see keyctl_assume_authority).  No other permissions are required.
 *
 * If successful, 0 will be returned.
 */

static long compat_keyctl_instantiate_key_iov( key_serial_t id, const struct compat_iovec __user *_payload_iov, unsigned ioc, key_serial_t ringid) { struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; struct iov_iter from; long ret; if (!_payload_iov) ioc = 0; ret = compat_import_iovec(WRITE, _payload_iov, ioc, ARRAY_SIZE(iovstack), &iov, &from); if (ret < 0) return ret; ret = keyctl_instantiate_key_common(id, &from, ringid); kfree(iov); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
david howellsdavid howells8584.16%266.67%
al viroal viro1615.84%133.33%
Total101100.00%3100.00%

/* * The key control system call, 32-bit compatibility version for 64-bit archs * * This should only be called if the 64-bit arch uses weird pointers in 32-bit * mode or doesn't guarantee that the top 32-bits of the argument registers on * taking a 32-bit syscall are zero. If you can, you should call sys_keyctl() * directly. */ COMPAT_SYSCALL_DEFINE5(keyctl, u32, option, u32, arg2, u32, arg3, u32, arg4, u32, arg5) { switch (option) { case KEYCTL_GET_KEYRING_ID: return keyctl_get_keyring_ID(arg2, arg3); case KEYCTL_JOIN_SESSION_KEYRING: return keyctl_join_session_keyring(compat_ptr(arg2)); case KEYCTL_UPDATE: return keyctl_update_key(arg2, compat_ptr(arg3), arg4); case KEYCTL_REVOKE: return keyctl_revoke_key(arg2); case KEYCTL_DESCRIBE: return keyctl_describe_key(arg2, compat_ptr(arg3), arg4); case KEYCTL_CLEAR: return keyctl_keyring_clear(arg2); case KEYCTL_LINK: return keyctl_keyring_link(arg2, arg3); case KEYCTL_UNLINK: return keyctl_keyring_unlink(arg2, arg3); case KEYCTL_SEARCH: return keyctl_keyring_search(arg2, compat_ptr(arg3), compat_ptr(arg4), arg5); case KEYCTL_READ: return keyctl_read_key(arg2, compat_ptr(arg3), arg4); case KEYCTL_CHOWN: return keyctl_chown_key(arg2, arg3, arg4); case KEYCTL_SETPERM: return keyctl_setperm_key(arg2, arg3); case KEYCTL_INSTANTIATE: return keyctl_instantiate_key(arg2, compat_ptr(arg3), arg4, arg5); case KEYCTL_NEGATE: return keyctl_negate_key(arg2, arg3, arg4); case KEYCTL_SET_REQKEY_KEYRING: return keyctl_set_reqkey_keyring(arg2); case KEYCTL_SET_TIMEOUT: return keyctl_set_timeout(arg2, arg3); case KEYCTL_ASSUME_AUTHORITY: return keyctl_assume_authority(arg2); case KEYCTL_GET_SECURITY: return keyctl_get_security(arg2, compat_ptr(arg3), arg4); case KEYCTL_SESSION_TO_PARENT: return keyctl_session_to_parent(); case KEYCTL_REJECT: return keyctl_reject_key(arg2, arg3, arg4, arg5); case KEYCTL_INSTANTIATE_IOV: return compat_keyctl_instantiate_key_iov( arg2, compat_ptr(arg3), arg4, arg5); case KEYCTL_INVALIDATE: return keyctl_invalidate_key(arg2); case KEYCTL_GET_PERSISTENT: return keyctl_get_persistent(arg2, arg3); case KEYCTL_DH_COMPUTE: return keyctl_dh_compute(compat_ptr(arg2), compat_ptr(arg3), arg4, compat_ptr(arg5)); default: return -EOPNOTSUPP; } }

Overall Contributors

PersonTokensPropCommitsCommitProp
david howellsdavid howells40886.44%1376.47%
heiko carstensheiko carstens245.08%15.88%
mat martineaumat martineau194.03%15.88%
al viroal viro163.39%15.88%
stephan muellerstephan mueller51.06%15.88%
Total472100.00%17100.00%
Directory: security/keys
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
{% endraw %}