OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4

[zen-stable.git] / include / linux / compat.h

#ifndef _LINUX_COMPAT_H
#define _LINUX_COMPAT_H
/*
 * These are the type definitions for the architecture specific
 * syscall compatibility layer.
 */

#ifdef CONFIG_COMPAT

#include <linux/stat.h>
#include <linux/param.h>        /* for HZ */
#include <linux/sem.h>
#include <linux/socket.h>
#include <linux/if.h>
#include <linux/fs.h>
#include <linux/aio_abi.h>      /* for aio_context_t */

#include <asm/compat.h>
#include <asm/siginfo.h>
#include <asm/signal.h>

#define compat_jiffies_to_clock_t(x)    \
                (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)

typedef __compat_uid32_t        compat_uid_t;
typedef __compat_gid32_t        compat_gid_t;

struct compat_sel_arg_struct;
struct rusage;

struct compat_itimerspec {
        struct compat_timespec it_interval;
        struct compat_timespec it_value;
};

struct compat_utimbuf {
        compat_time_t           actime;
        compat_time_t           modtime;
};

struct compat_itimerval {
        struct compat_timeval   it_interval;
        struct compat_timeval   it_value;
};

struct compat_tms {
        compat_clock_t          tms_utime;
        compat_clock_t          tms_stime;
        compat_clock_t          tms_cutime;
        compat_clock_t          tms_cstime;
};

struct compat_timex {
        compat_uint_t modes;
        compat_long_t offset;
        compat_long_t freq;
        compat_long_t maxerror;
        compat_long_t esterror;
        compat_int_t status;
        compat_long_t constant;
        compat_long_t precision;
        compat_long_t tolerance;
        struct compat_timeval time;
        compat_long_t tick;
        compat_long_t ppsfreq;
        compat_long_t jitter;
        compat_int_t shift;
        compat_long_t stabil;
        compat_long_t jitcnt;
        compat_long_t calcnt;
        compat_long_t errcnt;
        compat_long_t stbcnt;
        compat_int_t tai;

        compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
        compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
        compat_int_t:32; compat_int_t:32; compat_int_t:32;
};

#define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)

typedef struct {
        compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
} compat_sigset_t;

extern int get_compat_timespec(struct timespec *,
                               const struct compat_timespec __user *);
extern int put_compat_timespec(const struct timespec *,
                               struct compat_timespec __user *);

struct compat_iovec {
        compat_uptr_t   iov_base;
        compat_size_t   iov_len;
};

struct compat_rlimit {
        compat_ulong_t  rlim_cur;
        compat_ulong_t  rlim_max;
};

struct compat_rusage {
        struct compat_timeval ru_utime;
        struct compat_timeval ru_stime;
        compat_long_t   ru_maxrss;
        compat_long_t   ru_ixrss;
        compat_long_t   ru_idrss;
        compat_long_t   ru_isrss;
        compat_long_t   ru_minflt;
        compat_long_t   ru_majflt;
        compat_long_t   ru_nswap;
        compat_long_t   ru_inblock;
        compat_long_t   ru_oublock;
        compat_long_t   ru_msgsnd;
        compat_long_t   ru_msgrcv;
        compat_long_t   ru_nsignals;
        compat_long_t   ru_nvcsw;
        compat_long_t   ru_nivcsw;
};

extern int put_compat_rusage(const struct rusage *,
                             struct compat_rusage __user *);

struct compat_siginfo;

extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
                struct compat_siginfo __user *, int,
                struct compat_rusage __user *);

struct compat_dirent {
        u32             d_ino;
        compat_off_t    d_off;
        u16             d_reclen;
        char            d_name[256];
};

struct compat_ustat {
        compat_daddr_t          f_tfree;
        compat_ino_t            f_tinode;
        char                    f_fname[6];
        char                    f_fpack[6];
};

typedef union compat_sigval {
        compat_int_t    sival_int;
        compat_uptr_t   sival_ptr;
} compat_sigval_t;

#define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)

typedef struct compat_sigevent {
        compat_sigval_t sigev_value;
        compat_int_t sigev_signo;
        compat_int_t sigev_notify;
        union {
                compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
                compat_int_t _tid;

                struct {
                        compat_uptr_t _function;
                        compat_uptr_t _attribute;
                } _sigev_thread;
        } _sigev_un;
} compat_sigevent_t;

struct compat_ifmap {
        compat_ulong_t mem_start;
        compat_ulong_t mem_end;
        unsigned short base_addr;
        unsigned char irq;
        unsigned char dma;
        unsigned char port;
};

struct compat_if_settings {
        unsigned int type;      /* Type of physical device or protocol */
        unsigned int size;      /* Size of the data allocated by the caller */
        compat_uptr_t ifs_ifsu; /* union of pointers */
};

struct compat_ifreq {
        union {
                char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
        } ifr_ifrn;
        union {
                struct  sockaddr ifru_addr;
                struct  sockaddr ifru_dstaddr;
                struct  sockaddr ifru_broadaddr;
                struct  sockaddr ifru_netmask;
                struct  sockaddr ifru_hwaddr;
                short   ifru_flags;
                compat_int_t    ifru_ivalue;
                compat_int_t    ifru_mtu;
                struct  compat_ifmap ifru_map;
                char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
                char    ifru_newname[IFNAMSIZ];
                compat_caddr_t  ifru_data;
                struct  compat_if_settings ifru_settings;
        } ifr_ifru;
};

struct compat_ifconf {
        compat_int_t    ifc_len;                /* size of buffer */
        compat_caddr_t  ifcbuf;
};

struct compat_robust_list {
        compat_uptr_t                   next;
};

struct compat_robust_list_head {
        struct compat_robust_list       list;
        compat_long_t                   futex_offset;
        compat_uptr_t                   list_op_pending;
};

struct compat_statfs;
struct compat_statfs64;
struct compat_old_linux_dirent;
struct compat_linux_dirent;
struct linux_dirent64;
struct compat_msghdr;
struct compat_mmsghdr;
struct compat_sysinfo;
struct compat_sysctl_args;
struct compat_kexec_segment;
struct compat_mq_attr;

extern void compat_exit_robust_list(struct task_struct *curr);

asmlinkage long
compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
                           compat_size_t len);
asmlinkage long
compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
                           compat_size_t __user *len_ptr);

long compat_sys_semctl(int first, int second, int third, void __user *uptr);
long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
                int version, void __user *uptr);
long compat_sys_msgctl(int first, int second, void __user *uptr);
long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
                void __user *uptr);
long compat_sys_shmctl(int first, int second, void __user *uptr);
long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
                unsigned nsems, const struct compat_timespec __user *timeout);
asmlinkage long compat_sys_keyctl(u32 option,
                              u32 arg2, u32 arg3, u32 arg4, u32 arg5);
asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);

asmlinkage ssize_t compat_sys_readv(unsigned long fd,
                const struct compat_iovec __user *vec, unsigned long vlen);
asmlinkage ssize_t compat_sys_writev(unsigned long fd,
                const struct compat_iovec __user *vec, unsigned long vlen);
asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
                const struct compat_iovec __user *vec,
                unsigned long vlen, u32 pos_low, u32 pos_high);
asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
                const struct compat_iovec __user *vec,
                unsigned long vlen, u32 pos_low, u32 pos_high);

int compat_do_execve(char *filename, compat_uptr_t __user *argv,
                     compat_uptr_t __user *envp, struct pt_regs *regs);

asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
                compat_ulong_t __user *outp, compat_ulong_t __user *exp,
                struct compat_timeval __user *tvp);

asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);

asmlinkage long compat_sys_wait4(compat_pid_t pid,
                                 compat_uint_t __user *stat_addr, int options,
                                 struct compat_rusage __user *ru);

#define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))

#define BITS_TO_COMPAT_LONGS(bits) \
        (((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)

long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
                       unsigned long bitmap_size);
long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
                       unsigned long bitmap_size);
int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
int get_compat_sigevent(struct sigevent *event,
                const struct compat_sigevent __user *u_event);
long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig,
                                  struct compat_siginfo __user *uinfo);

static inline int compat_timeval_compare(struct compat_timeval *lhs,
                                        struct compat_timeval *rhs)
{
        if (lhs->tv_sec < rhs->tv_sec)
                return -1;
        if (lhs->tv_sec > rhs->tv_sec)
                return 1;
        return lhs->tv_usec - rhs->tv_usec;
}

static inline int compat_timespec_compare(struct compat_timespec *lhs,
                                        struct compat_timespec *rhs)
{
        if (lhs->tv_sec < rhs->tv_sec)
                return -1;
        if (lhs->tv_sec > rhs->tv_sec)
                return 1;
        return lhs->tv_nsec - rhs->tv_nsec;
}

extern int get_compat_itimerspec(struct itimerspec *dst,
                                 const struct compat_itimerspec __user *src);
extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
                                 const struct itimerspec *src);

asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
                struct timezone __user *tz);
asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
                struct timezone __user *tz);

asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);

extern int compat_printk(const char *fmt, ...);
extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);

asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
                compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
                const compat_ulong_t __user *new_nodes);

extern int compat_ptrace_request(struct task_struct *child,
                                 compat_long_t request,
                                 compat_ulong_t addr, compat_ulong_t data);

extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
                               compat_ulong_t addr, compat_ulong_t data);
asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
                                  compat_long_t addr, compat_long_t data);

/*
 * epoll (fs/eventpoll.c) compat bits follow ...
 */
struct epoll_event;
#define compat_epoll_event      epoll_event
asmlinkage long compat_sys_epoll_pwait(int epfd,
                        struct compat_epoll_event __user *events,
                        int maxevents, int timeout,
                        const compat_sigset_t __user *sigmask,
                        compat_size_t sigsetsize);

asmlinkage long compat_sys_utime(const char __user *filename,
                                 struct compat_utimbuf __user *t);
asmlinkage long compat_sys_utimensat(unsigned int dfd,
                                     const char __user *filename,
                                     struct compat_timespec __user *t,
                                     int flags);

asmlinkage long compat_sys_time(compat_time_t __user *tloc);
asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
asmlinkage long compat_sys_signalfd(int ufd,
                                    const compat_sigset_t __user *sigmask,
                                    compat_size_t sigsetsize);
asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
                                   const struct compat_itimerspec __user *utmr,
                                   struct compat_itimerspec __user *otmr);
asmlinkage long compat_sys_timerfd_gettime(int ufd,
                                   struct compat_itimerspec __user *otmr);

asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_page,
                                      __u32 __user *pages,
                                      const int __user *nodes,
                                      int __user *status,
                                      int flags);
asmlinkage long compat_sys_futimesat(unsigned int dfd,
                                     const char __user *filename,
                                     struct compat_timeval __user *t);
asmlinkage long compat_sys_utimes(const char __user *filename,
                                  struct compat_timeval __user *t);
asmlinkage long compat_sys_newstat(const char __user *filename,
                                   struct compat_stat __user *statbuf);
asmlinkage long compat_sys_newlstat(const char __user *filename,
                                    struct compat_stat __user *statbuf);
asmlinkage long compat_sys_newfstatat(unsigned int dfd,
                                      const char __user *filename,
                                      struct compat_stat __user *statbuf,
                                      int flag);
asmlinkage long compat_sys_newfstat(unsigned int fd,
                                    struct compat_stat __user *statbuf);
asmlinkage long compat_sys_statfs(const char __user *pathname,
                                  struct compat_statfs __user *buf);
asmlinkage long compat_sys_fstatfs(unsigned int fd,
                                   struct compat_statfs __user *buf);
asmlinkage long compat_sys_statfs64(const char __user *pathname,
                                    compat_size_t sz,
                                    struct compat_statfs64 __user *buf);
asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
                                     struct compat_statfs64 __user *buf);
asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
                                   unsigned long arg);
asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
                                 unsigned long arg);
asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
asmlinkage long compat_sys_io_getevents(aio_context_t ctx_id,
                                        unsigned long min_nr,
                                        unsigned long nr,
                                        struct io_event __user *events,
                                        struct compat_timespec __user *timeout);
asmlinkage long compat_sys_io_submit(aio_context_t ctx_id, int nr,
                                     u32 __user *iocb);
asmlinkage long compat_sys_mount(const char __user *dev_name,
                                 const char __user *dir_name,
                                 const char __user *type, unsigned long flags,
                                 const void __user *data);
asmlinkage long compat_sys_old_readdir(unsigned int fd,
                                       struct compat_old_linux_dirent __user *,
                                       unsigned int count);
asmlinkage long compat_sys_getdents(unsigned int fd,
                                    struct compat_linux_dirent __user *dirent,
                                    unsigned int count);
asmlinkage long compat_sys_getdents64(unsigned int fd,
                                      struct linux_dirent64 __user *dirent,
                                      unsigned int count);
asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
                                    unsigned int nr_segs, unsigned int flags);
asmlinkage long compat_sys_open(const char __user *filename, int flags,
                                umode_t mode);
asmlinkage long compat_sys_openat(unsigned int dfd, const char __user *filename,
                                  int flags, umode_t mode);
asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
                                             struct file_handle __user *handle,
                                             int flags);
asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
                                    compat_ulong_t __user *outp,
                                    compat_ulong_t __user *exp,
                                    struct compat_timespec __user *tsp,
                                    void __user *sig);
asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
                                 unsigned int nfds,
                                 struct compat_timespec __user *tsp,
                                 const compat_sigset_t __user *sigmask,
                                 compat_size_t sigsetsize);
asmlinkage long compat_sys_signalfd4(int ufd,
                                     const compat_sigset_t __user *sigmask,
                                     compat_size_t sigsetsize, int flags);
asmlinkage long compat_sys_get_mempolicy(int __user *policy,
                                         compat_ulong_t __user *nmask,
                                         compat_ulong_t maxnode,
                                         compat_ulong_t addr,
                                         compat_ulong_t flags);
asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
                                         compat_ulong_t maxnode);
asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
                                 compat_ulong_t mode,
                                 compat_ulong_t __user *nmask,
                                 compat_ulong_t maxnode, compat_ulong_t flags);

asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
                                      char __user *optval, unsigned int optlen);
asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
                                   unsigned flags);
asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
                                    unsigned vlen, unsigned int flags);
asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
                                   unsigned int flags);
asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len,
                                unsigned flags);
asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
                            unsigned flags, struct sockaddr __user *addr,
                            int __user *addrlen);
asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
                                    unsigned vlen, unsigned int flags,
                                    struct compat_timespec __user *timeout);
asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
                                     struct compat_timespec __user *rmtp);
asmlinkage long compat_sys_getitimer(int which,
                                     struct compat_itimerval __user *it);
asmlinkage long compat_sys_setitimer(int which,
                                     struct compat_itimerval __user *in,
                                     struct compat_itimerval __user *out);
asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
asmlinkage long compat_sys_setrlimit(unsigned int resource,
                                     struct compat_rlimit __user *rlim);
asmlinkage long compat_sys_getrlimit(unsigned int resource,
                                     struct compat_rlimit __user *rlim);
asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
                                     unsigned int len,
                                     compat_ulong_t __user *user_mask_ptr);
asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
                                     unsigned int len,
                                     compat_ulong_t __user *user_mask_ptr);
asmlinkage long compat_sys_timer_create(clockid_t which_clock,
                        struct compat_sigevent __user *timer_event_spec,
                        timer_t __user *created_timer_id);
asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
                                         struct compat_itimerspec __user *new,
                                         struct compat_itimerspec __user *old);
asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
                                 struct compat_itimerspec __user *setting);
asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
                                         struct compat_timespec __user *tp);
asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
                                         struct compat_timespec __user *tp);
asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
                                         struct compat_timex __user *tp);
asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
                                        struct compat_timespec __user *tp);
asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
                                           struct compat_timespec __user *rqtp,
                                           struct compat_timespec __user *rmtp);
asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
                struct compat_siginfo __user *uinfo,
                struct compat_timespec __user *uts, compat_size_t sigsetsize);
asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
                                         compat_size_t sigsetsize);
asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
                                 unsigned long arg);
asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
                struct compat_timespec __user *utime, u32 __user *uaddr2,
                u32 val3);
asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
                                      char __user *optval, int __user *optlen);
asmlinkage long compat_sys_kexec_load(unsigned long entry,
                                      unsigned long nr_segments,
                                      struct compat_kexec_segment __user *,
                                      unsigned long flags);
asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
                        const struct compat_mq_attr __user *u_mqstat,
                        struct compat_mq_attr __user *u_omqstat);
asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
                        const struct compat_sigevent __user *u_notification);
asmlinkage long compat_sys_mq_open(const char __user *u_name,
                        int oflag, compat_mode_t mode,
                        struct compat_mq_attr __user *u_attr);
asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
                        const char __user *u_msg_ptr,
                        size_t msg_len, unsigned int msg_prio,
                        const struct compat_timespec __user *u_abs_timeout);
asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
                        char __user *u_msg_ptr,
                        size_t msg_len, unsigned int __user *u_msg_prio,
                        const struct compat_timespec __user *u_abs_timeout);
asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);

extern ssize_t compat_rw_copy_check_uvector(int type,
                const struct compat_iovec __user *uvector,
                unsigned long nr_segs,
                unsigned long fast_segs, struct iovec *fast_pointer,
                struct iovec **ret_pointer,
                int check_access);

extern void __user *compat_alloc_user_space(unsigned long len);

asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
                const struct compat_iovec __user *lvec,
                unsigned long liovcnt, const struct compat_iovec __user *rvec,
                unsigned long riovcnt, unsigned long flags);
asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
                const struct compat_iovec __user *lvec,
                unsigned long liovcnt, const struct compat_iovec __user *rvec,
                unsigned long riovcnt, unsigned long flags);

#else

#define is_compat_task() (0)

#endif /* CONFIG_COMPAT */
#endif /* _LINUX_COMPAT_H */