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[CVE-2009-0029] s390 specific system call wrappers 

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
hifive-unleashed-5.1
Heiko Carstens 2009-01-14 14:14:36 +01:00
parent 2b66421995
commit 26689452f5
6 changed files with 50 additions and 44 deletions
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4
arch/s390/kernel/compat_wrapper.S
View File

@ -547,7 +547,7 @@ sys32_setdomainname_wrapper:
.globl sys32_newuname_wrapper
sys32_newuname_wrapper:
llgtr %r2,%r2 # struct new_utsname *
jg s390x_newuname # branch to system call
jg sys_s390_newuname # branch to system call
.globl compat_sys_adjtimex_wrapper
compat_sys_adjtimex_wrapper:
@ -615,7 +615,7 @@ sys32_sysfs_wrapper:
.globl sys32_personality_wrapper
sys32_personality_wrapper:
llgfr %r2,%r2 # unsigned long
jg s390x_personality # branch to system call
jg sys_s390_personality # branch to system call
.globl sys32_setfsuid16_wrapper
sys32_setfsuid16_wrapper:

15
arch/s390/kernel/entry.h
View File

@ -31,21 +31,22 @@ struct old_sigaction;
struct sel_arg_struct;
long sys_mmap2(struct mmap_arg_struct __user *arg);
long old_mmap(struct mmap_arg_struct __user *arg);
long sys_s390_old_mmap(struct mmap_arg_struct __user *arg);
long sys_ipc(uint call, int first, unsigned long second,
unsigned long third, void __user *ptr);
long s390x_newuname(struct new_utsname __user *name);
long s390x_personality(unsigned long personality);
long s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
long sys_s390_newuname(struct new_utsname __user *name);
long sys_s390_personality(unsigned long personality);
long sys_s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
size_t len, int advice);
long s390_fadvise64_64(struct fadvise64_64_args __user *args);
long s390_fallocate(int fd, int mode, loff_t offset, u32 len_high, u32 len_low);
long sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
u32 len_low);
long sys_fork(void);
long sys_clone(void);
long sys_vfork(void);
void execve_tail(void);
long sys_execve(void);
int sys_sigsuspend(int history0, int history1, old_sigset_t mask);
long sys_sigsuspend(int history0, int history1, old_sigset_t mask);
long sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact);
long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss);

9
arch/s390/kernel/process.c
View File

@ -39,6 +39,7 @@
#include <linux/tick.h>
#include <linux/elfcore.h>
#include <linux/kernel_stat.h>
#include <linux/syscalls.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@ -225,13 +226,13 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
return 0;
}
asmlinkage long sys_fork(void)
SYSCALL_DEFINE0(fork)
{
struct pt_regs *regs = task_pt_regs(current);
return do_fork(SIGCHLD, regs->gprs[15], regs, 0, NULL, NULL);
}
asmlinkage long sys_clone(void)
SYSCALL_DEFINE0(clone)
{
struct pt_regs *regs = task_pt_regs(current);
unsigned long clone_flags;
@ -258,7 +259,7 @@ asmlinkage long sys_clone(void)
* do not have enough call-clobbered registers to hold all
* the information you need.
*/
asmlinkage long sys_vfork(void)
SYSCALL_DEFINE0(vfork)
{
struct pt_regs *regs = task_pt_regs(current);
return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
@ -278,7 +279,7 @@ asmlinkage void execve_tail(void)
/*
* sys_execve() executes a new program.
*/
asmlinkage long sys_execve(void)
SYSCALL_DEFINE0(execve)
{
struct pt_regs *regs = task_pt_regs(current);
char *filename;

19
arch/s390/kernel/signal.c
View File

@ -25,6 +25,7 @@
#include <linux/personality.h>
#include <linux/binfmts.h>
#include <linux/tracehook.h>
#include <linux/syscalls.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/lowcore.h>
@ -53,8 +54,7 @@ typedef struct
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int
sys_sigsuspend(int history0, int history1, old_sigset_t mask)
SYSCALL_DEFINE3(sigsuspend, int, history0, int, history1, old_sigset_t, mask)
{
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
@ -70,9 +70,8 @@ sys_sigsuspend(int history0, int history1, old_sigset_t mask)
return -ERESTARTNOHAND;
}
asmlinkage long
sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact)
SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,
struct old_sigaction __user *, oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
@ -102,15 +101,13 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
return ret;
}
asmlinkage long
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
SYSCALL_DEFINE2(sigaltstack, const stack_t __user *, uss,
stack_t __user *, uoss)
{
struct pt_regs *regs = task_pt_regs(current);
return do_sigaltstack(uss, uoss, regs->gprs[15]);
}
/* Returns non-zero on fault. */
static int save_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
{
@ -164,7 +161,7 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
return 0;
}
asmlinkage long sys_sigreturn(void)
SYSCALL_DEFINE0(sigreturn)
{
struct pt_regs *regs = task_pt_regs(current);
sigframe __user *frame = (sigframe __user *)regs->gprs[15];
@ -191,7 +188,7 @@ badframe:
return 0;
}
asmlinkage long sys_rt_sigreturn(void)
SYSCALL_DEFINE0(rt_sigreturn)
{
struct pt_regs *regs = task_pt_regs(current);
rt_sigframe __user *frame = (rt_sigframe __user *)regs->gprs[15];

35
arch/s390/kernel/sys_s390.c
View File

@ -29,6 +29,7 @@
#include <linux/personality.h>
#include <linux/unistd.h>
#include <linux/ipc.h>
#include <linux/syscalls.h>
#include <asm/uaccess.h>
#include "entry.h"
@ -74,7 +75,7 @@ struct mmap_arg_struct {
unsigned long offset;
};
asmlinkage long sys_mmap2(struct mmap_arg_struct __user *arg)
SYSCALL_DEFINE1(mmap2, struct mmap_arg_struct __user *, arg)
{
struct mmap_arg_struct a;
int error = -EFAULT;
@ -86,7 +87,7 @@ out:
return error;
}
asmlinkage long old_mmap(struct mmap_arg_struct __user *arg)
SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct __user *, arg)
{
struct mmap_arg_struct a;
long error = -EFAULT;
@ -108,8 +109,8 @@ out:
*
* This is really horribly ugly.
*/
asmlinkage long sys_ipc(uint call, int first, unsigned long second,
unsigned long third, void __user *ptr)
SYSCALL_DEFINE5(ipc, uint, call, int, first, unsigned long, second,
unsigned long, third, void __user *, ptr)
{
struct ipc_kludge tmp;
int ret;
@ -175,7 +176,7 @@ asmlinkage long sys_ipc(uint call, int first, unsigned long second,
}
#ifdef CONFIG_64BIT
asmlinkage long s390x_newuname(struct new_utsname __user *name)
SYSCALL_DEFINE1(s390_newuname, struct new_utsname __user *, name)
{
int ret = sys_newuname(name);
@ -186,7 +187,7 @@ asmlinkage long s390x_newuname(struct new_utsname __user *name)
return ret;
}
asmlinkage long s390x_personality(unsigned long personality)
SYSCALL_DEFINE1(s390_personality, unsigned long, personality)
{
int ret;
@ -205,15 +206,13 @@ asmlinkage long s390x_personality(unsigned long personality)
*/
#ifndef CONFIG_64BIT
asmlinkage long
s390_fadvise64(int fd, u32 offset_high, u32 offset_low, size_t len, int advice)
SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, offset_high, u32, offset_low,
size_t, len, int, advice)
{
return sys_fadvise64(fd, (u64) offset_high << 32 | offset_low,
len, advice);
}
#endif
struct fadvise64_64_args {
int fd;
long long offset;
@ -221,8 +220,7 @@ struct fadvise64_64_args {
int advice;
};
asmlinkage long
s390_fadvise64_64(struct fadvise64_64_args __user *args)
SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args)
{
struct fadvise64_64_args a;
@ -231,7 +229,6 @@ s390_fadvise64_64(struct fadvise64_64_args __user *args)
return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
}
#ifndef CONFIG_64BIT
/*
* This is a wrapper to call sys_fallocate(). For 31 bit s390 the last
* 64 bit argument "len" is split into the upper and lower 32 bits. The
@ -244,9 +241,19 @@ s390_fadvise64_64(struct fadvise64_64_args __user *args)
* to
* %r2: fd, %r3: mode, %r4/%r5: offset, 96(%r15)-103(%r15): len
*/
asmlinkage long s390_fallocate(int fd, int mode, loff_t offset,
SYSCALL_DEFINE(s390_fallocate)(int fd, int mode, loff_t offset,
u32 len_high, u32 len_low)
{
return sys_fallocate(fd, mode, offset, ((u64)len_high << 32) | len_low);
}
#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
asmlinkage long SyS_s390_fallocate(long fd, long mode, loff_t offset,
long len_high, long len_low)
{
return SYSC_s390_fallocate((int) fd, (int) mode, offset,
(u32) len_high, (u32) len_low);
}
SYSCALL_ALIAS(sys_s390_fallocate, SyS_s390_fallocate);
#endif
#endif

12
arch/s390/kernel/syscalls.S
View File

@ -98,7 +98,7 @@ SYSCALL(sys_uselib,sys_uselib,sys32_uselib_wrapper)
SYSCALL(sys_swapon,sys_swapon,sys32_swapon_wrapper)
SYSCALL(sys_reboot,sys_reboot,sys32_reboot_wrapper)
SYSCALL(sys_ni_syscall,sys_ni_syscall,old32_readdir_wrapper) /* old readdir syscall */
SYSCALL(old_mmap,old_mmap,old32_mmap_wrapper) /* 90 */
SYSCALL(sys_s390_old_mmap,sys_s390_old_mmap,old32_mmap_wrapper) /* 90 */
SYSCALL(sys_munmap,sys_munmap,sys32_munmap_wrapper)
SYSCALL(sys_truncate,sys_truncate,sys32_truncate_wrapper)
SYSCALL(sys_ftruncate,sys_ftruncate,sys32_ftruncate_wrapper)
@ -130,7 +130,7 @@ SYSCALL(sys_fsync,sys_fsync,sys32_fsync_wrapper)
SYSCALL(sys_sigreturn,sys_sigreturn,sys32_sigreturn)
SYSCALL(sys_clone,sys_clone,sys32_clone) /* 120 */
SYSCALL(sys_setdomainname,sys_setdomainname,sys32_setdomainname_wrapper)
SYSCALL(sys_newuname,s390x_newuname,sys32_newuname_wrapper)
SYSCALL(sys_newuname,sys_s390_newuname,sys32_newuname_wrapper)
NI_SYSCALL /* modify_ldt for i386 */
SYSCALL(sys_adjtimex,sys_adjtimex,compat_sys_adjtimex_wrapper)
SYSCALL(sys_mprotect,sys_mprotect,sys32_mprotect_wrapper) /* 125 */
@ -144,7 +144,7 @@ SYSCALL(sys_getpgid,sys_getpgid,sys32_getpgid_wrapper)
SYSCALL(sys_fchdir,sys_fchdir,sys32_fchdir_wrapper)
SYSCALL(sys_bdflush,sys_bdflush,sys32_bdflush_wrapper)
SYSCALL(sys_sysfs,sys_sysfs,sys32_sysfs_wrapper) /* 135 */
SYSCALL(sys_personality,s390x_personality,sys32_personality_wrapper)
SYSCALL(sys_personality,sys_s390_personality,sys32_personality_wrapper)
NI_SYSCALL /* for afs_syscall */
SYSCALL(sys_setfsuid16,sys_ni_syscall,sys32_setfsuid16_wrapper) /* old setfsuid16 syscall */
SYSCALL(sys_setfsgid16,sys_ni_syscall,sys32_setfsgid16_wrapper) /* old setfsgid16 syscall */
@ -261,7 +261,7 @@ SYSCALL(sys_epoll_create,sys_epoll_create,sys_epoll_create_wrapper)
SYSCALL(sys_epoll_ctl,sys_epoll_ctl,sys_epoll_ctl_wrapper) /* 250 */
SYSCALL(sys_epoll_wait,sys_epoll_wait,sys_epoll_wait_wrapper)
SYSCALL(sys_set_tid_address,sys_set_tid_address,sys32_set_tid_address_wrapper)
SYSCALL(s390_fadvise64,sys_fadvise64_64,sys32_fadvise64_wrapper)
SYSCALL(sys_s390_fadvise64,sys_fadvise64_64,sys32_fadvise64_wrapper)
SYSCALL(sys_timer_create,sys_timer_create,sys32_timer_create_wrapper)
SYSCALL(sys_timer_settime,sys_timer_settime,sys32_timer_settime_wrapper) /* 255 */
SYSCALL(sys_timer_gettime,sys_timer_gettime,sys32_timer_gettime_wrapper)
@ -272,7 +272,7 @@ SYSCALL(sys_clock_gettime,sys_clock_gettime,sys32_clock_gettime_wrapper) /* 260
SYSCALL(sys_clock_getres,sys_clock_getres,sys32_clock_getres_wrapper)
SYSCALL(sys_clock_nanosleep,sys_clock_nanosleep,sys32_clock_nanosleep_wrapper)
NI_SYSCALL /* reserved for vserver */
SYSCALL(s390_fadvise64_64,sys_ni_syscall,sys32_fadvise64_64_wrapper)
SYSCALL(sys_s390_fadvise64_64,sys_ni_syscall,sys32_fadvise64_64_wrapper)
SYSCALL(sys_statfs64,sys_statfs64,compat_sys_statfs64_wrapper)
SYSCALL(sys_fstatfs64,sys_fstatfs64,compat_sys_fstatfs64_wrapper)
SYSCALL(sys_remap_file_pages,sys_remap_file_pages,sys32_remap_file_pages_wrapper)
@ -322,7 +322,7 @@ NI_SYSCALL /* 310 sys_move_pages */
SYSCALL(sys_getcpu,sys_getcpu,sys_getcpu_wrapper)
SYSCALL(sys_epoll_pwait,sys_epoll_pwait,compat_sys_epoll_pwait_wrapper)
SYSCALL(sys_utimes,sys_utimes,compat_sys_utimes_wrapper)
SYSCALL(s390_fallocate,sys_fallocate,sys_fallocate_wrapper)
SYSCALL(sys_s390_fallocate,sys_fallocate,sys_fallocate_wrapper)
SYSCALL(sys_utimensat,sys_utimensat,compat_sys_utimensat_wrapper) /* 315 */
SYSCALL(sys_signalfd,sys_signalfd,compat_sys_signalfd_wrapper)
NI_SYSCALL /* 317 old sys_timer_fd */