mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-30 13:38:40 +00:00
34e1169d99
As part of the effort to create a stronger boundary between root and kernel, Chrome OS wants to be able to enforce that kernel modules are being loaded only from our read-only crypto-hash verified (dm_verity) root filesystem. Since the init_module syscall hands the kernel a module as a memory blob, no reasoning about the origin of the blob can be made. Earlier proposals for appending signatures to kernel modules would not be useful in Chrome OS, since it would involve adding an additional set of keys to our kernel and builds for no good reason: we already trust the contents of our root filesystem. We don't need to verify those kernel modules a second time. Having to do signature checking on module loading would slow us down and be redundant. All we need to know is where a module is coming from so we can say yes/no to loading it. If a file descriptor is used as the source of a kernel module, many more things can be reasoned about. In Chrome OS's case, we could enforce that the module lives on the filesystem we expect it to live on. In the case of IMA (or other LSMs), it would be possible, for example, to examine extended attributes that may contain signatures over the contents of the module. This introduces a new syscall (on x86), similar to init_module, that has only two arguments. The first argument is used as a file descriptor to the module and the second argument is a pointer to the NULL terminated string of module arguments. Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (merge fixes)
210 lines
5.9 KiB
C
210 lines
5.9 KiB
C
|
|
#include <linux/linkage.h>
|
|
#include <linux/errno.h>
|
|
|
|
#include <asm/unistd.h>
|
|
|
|
/* we can't #include <linux/syscalls.h> here,
|
|
but tell gcc to not warn with -Wmissing-prototypes */
|
|
asmlinkage long sys_ni_syscall(void);
|
|
|
|
/*
|
|
* Non-implemented system calls get redirected here.
|
|
*/
|
|
asmlinkage long sys_ni_syscall(void)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
cond_syscall(sys_quotactl);
|
|
cond_syscall(sys32_quotactl);
|
|
cond_syscall(sys_acct);
|
|
cond_syscall(sys_lookup_dcookie);
|
|
cond_syscall(sys_swapon);
|
|
cond_syscall(sys_swapoff);
|
|
cond_syscall(sys_kexec_load);
|
|
cond_syscall(compat_sys_kexec_load);
|
|
cond_syscall(sys_init_module);
|
|
cond_syscall(sys_finit_module);
|
|
cond_syscall(sys_delete_module);
|
|
cond_syscall(sys_socketpair);
|
|
cond_syscall(sys_bind);
|
|
cond_syscall(sys_listen);
|
|
cond_syscall(sys_accept);
|
|
cond_syscall(sys_accept4);
|
|
cond_syscall(sys_connect);
|
|
cond_syscall(sys_getsockname);
|
|
cond_syscall(sys_getpeername);
|
|
cond_syscall(sys_sendto);
|
|
cond_syscall(sys_send);
|
|
cond_syscall(sys_recvfrom);
|
|
cond_syscall(sys_recv);
|
|
cond_syscall(sys_socket);
|
|
cond_syscall(sys_setsockopt);
|
|
cond_syscall(compat_sys_setsockopt);
|
|
cond_syscall(sys_getsockopt);
|
|
cond_syscall(compat_sys_getsockopt);
|
|
cond_syscall(sys_shutdown);
|
|
cond_syscall(sys_sendmsg);
|
|
cond_syscall(sys_sendmmsg);
|
|
cond_syscall(compat_sys_sendmsg);
|
|
cond_syscall(compat_sys_sendmmsg);
|
|
cond_syscall(sys_recvmsg);
|
|
cond_syscall(sys_recvmmsg);
|
|
cond_syscall(compat_sys_recvmsg);
|
|
cond_syscall(compat_sys_recv);
|
|
cond_syscall(compat_sys_recvfrom);
|
|
cond_syscall(compat_sys_recvmmsg);
|
|
cond_syscall(sys_socketcall);
|
|
cond_syscall(sys_futex);
|
|
cond_syscall(compat_sys_futex);
|
|
cond_syscall(sys_set_robust_list);
|
|
cond_syscall(compat_sys_set_robust_list);
|
|
cond_syscall(sys_get_robust_list);
|
|
cond_syscall(compat_sys_get_robust_list);
|
|
cond_syscall(sys_epoll_create);
|
|
cond_syscall(sys_epoll_create1);
|
|
cond_syscall(sys_epoll_ctl);
|
|
cond_syscall(sys_epoll_wait);
|
|
cond_syscall(sys_epoll_pwait);
|
|
cond_syscall(compat_sys_epoll_pwait);
|
|
cond_syscall(sys_semget);
|
|
cond_syscall(sys_semop);
|
|
cond_syscall(sys_semtimedop);
|
|
cond_syscall(compat_sys_semtimedop);
|
|
cond_syscall(sys_semctl);
|
|
cond_syscall(compat_sys_semctl);
|
|
cond_syscall(sys_msgget);
|
|
cond_syscall(sys_msgsnd);
|
|
cond_syscall(compat_sys_msgsnd);
|
|
cond_syscall(sys_msgrcv);
|
|
cond_syscall(compat_sys_msgrcv);
|
|
cond_syscall(sys_msgctl);
|
|
cond_syscall(compat_sys_msgctl);
|
|
cond_syscall(sys_shmget);
|
|
cond_syscall(sys_shmat);
|
|
cond_syscall(compat_sys_shmat);
|
|
cond_syscall(sys_shmdt);
|
|
cond_syscall(sys_shmctl);
|
|
cond_syscall(compat_sys_shmctl);
|
|
cond_syscall(sys_mq_open);
|
|
cond_syscall(sys_mq_unlink);
|
|
cond_syscall(sys_mq_timedsend);
|
|
cond_syscall(sys_mq_timedreceive);
|
|
cond_syscall(sys_mq_notify);
|
|
cond_syscall(sys_mq_getsetattr);
|
|
cond_syscall(compat_sys_mq_open);
|
|
cond_syscall(compat_sys_mq_timedsend);
|
|
cond_syscall(compat_sys_mq_timedreceive);
|
|
cond_syscall(compat_sys_mq_notify);
|
|
cond_syscall(compat_sys_mq_getsetattr);
|
|
cond_syscall(sys_mbind);
|
|
cond_syscall(sys_get_mempolicy);
|
|
cond_syscall(sys_set_mempolicy);
|
|
cond_syscall(compat_sys_mbind);
|
|
cond_syscall(compat_sys_get_mempolicy);
|
|
cond_syscall(compat_sys_set_mempolicy);
|
|
cond_syscall(sys_add_key);
|
|
cond_syscall(sys_request_key);
|
|
cond_syscall(sys_keyctl);
|
|
cond_syscall(compat_sys_keyctl);
|
|
cond_syscall(compat_sys_socketcall);
|
|
cond_syscall(sys_inotify_init);
|
|
cond_syscall(sys_inotify_init1);
|
|
cond_syscall(sys_inotify_add_watch);
|
|
cond_syscall(sys_inotify_rm_watch);
|
|
cond_syscall(sys_migrate_pages);
|
|
cond_syscall(sys_move_pages);
|
|
cond_syscall(sys_chown16);
|
|
cond_syscall(sys_fchown16);
|
|
cond_syscall(sys_getegid16);
|
|
cond_syscall(sys_geteuid16);
|
|
cond_syscall(sys_getgid16);
|
|
cond_syscall(sys_getgroups16);
|
|
cond_syscall(sys_getresgid16);
|
|
cond_syscall(sys_getresuid16);
|
|
cond_syscall(sys_getuid16);
|
|
cond_syscall(sys_lchown16);
|
|
cond_syscall(sys_setfsgid16);
|
|
cond_syscall(sys_setfsuid16);
|
|
cond_syscall(sys_setgid16);
|
|
cond_syscall(sys_setgroups16);
|
|
cond_syscall(sys_setregid16);
|
|
cond_syscall(sys_setresgid16);
|
|
cond_syscall(sys_setresuid16);
|
|
cond_syscall(sys_setreuid16);
|
|
cond_syscall(sys_setuid16);
|
|
cond_syscall(sys_vm86old);
|
|
cond_syscall(sys_vm86);
|
|
cond_syscall(sys_ipc);
|
|
cond_syscall(compat_sys_ipc);
|
|
cond_syscall(compat_sys_sysctl);
|
|
cond_syscall(sys_flock);
|
|
cond_syscall(sys_io_setup);
|
|
cond_syscall(sys_io_destroy);
|
|
cond_syscall(sys_io_submit);
|
|
cond_syscall(sys_io_cancel);
|
|
cond_syscall(sys_io_getevents);
|
|
cond_syscall(sys_syslog);
|
|
cond_syscall(sys_process_vm_readv);
|
|
cond_syscall(sys_process_vm_writev);
|
|
cond_syscall(compat_sys_process_vm_readv);
|
|
cond_syscall(compat_sys_process_vm_writev);
|
|
|
|
/* arch-specific weak syscall entries */
|
|
cond_syscall(sys_pciconfig_read);
|
|
cond_syscall(sys_pciconfig_write);
|
|
cond_syscall(sys_pciconfig_iobase);
|
|
cond_syscall(sys32_ipc);
|
|
cond_syscall(ppc_rtas);
|
|
cond_syscall(sys_spu_run);
|
|
cond_syscall(sys_spu_create);
|
|
cond_syscall(sys_subpage_prot);
|
|
|
|
/* mmu depending weak syscall entries */
|
|
cond_syscall(sys_mprotect);
|
|
cond_syscall(sys_msync);
|
|
cond_syscall(sys_mlock);
|
|
cond_syscall(sys_munlock);
|
|
cond_syscall(sys_mlockall);
|
|
cond_syscall(sys_munlockall);
|
|
cond_syscall(sys_mincore);
|
|
cond_syscall(sys_madvise);
|
|
cond_syscall(sys_mremap);
|
|
cond_syscall(sys_remap_file_pages);
|
|
cond_syscall(compat_sys_move_pages);
|
|
cond_syscall(compat_sys_migrate_pages);
|
|
|
|
/* block-layer dependent */
|
|
cond_syscall(sys_bdflush);
|
|
cond_syscall(sys_ioprio_set);
|
|
cond_syscall(sys_ioprio_get);
|
|
|
|
/* New file descriptors */
|
|
cond_syscall(sys_signalfd);
|
|
cond_syscall(sys_signalfd4);
|
|
cond_syscall(compat_sys_signalfd);
|
|
cond_syscall(compat_sys_signalfd4);
|
|
cond_syscall(sys_timerfd_create);
|
|
cond_syscall(sys_timerfd_settime);
|
|
cond_syscall(sys_timerfd_gettime);
|
|
cond_syscall(compat_sys_timerfd_settime);
|
|
cond_syscall(compat_sys_timerfd_gettime);
|
|
cond_syscall(sys_eventfd);
|
|
cond_syscall(sys_eventfd2);
|
|
|
|
/* performance counters: */
|
|
cond_syscall(sys_perf_event_open);
|
|
|
|
/* fanotify! */
|
|
cond_syscall(sys_fanotify_init);
|
|
cond_syscall(sys_fanotify_mark);
|
|
|
|
/* open by handle */
|
|
cond_syscall(sys_name_to_handle_at);
|
|
cond_syscall(sys_open_by_handle_at);
|
|
cond_syscall(compat_sys_open_by_handle_at);
|
|
|
|
/* compare kernel pointers */
|
|
cond_syscall(sys_kcmp);
|