diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/compat.c | 113 |
1 files changed, 65 insertions, 48 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index c9e2ec0b34a8..449e853cf41d 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -52,6 +52,64 @@ static int compat_put_timeval(struct compat_timeval __user *o, put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; } +static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) +{ + memset(txc, 0, sizeof(struct timex)); + + if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || + __get_user(txc->modes, &utp->modes) || + __get_user(txc->offset, &utp->offset) || + __get_user(txc->freq, &utp->freq) || + __get_user(txc->maxerror, &utp->maxerror) || + __get_user(txc->esterror, &utp->esterror) || + __get_user(txc->status, &utp->status) || + __get_user(txc->constant, &utp->constant) || + __get_user(txc->precision, &utp->precision) || + __get_user(txc->tolerance, &utp->tolerance) || + __get_user(txc->time.tv_sec, &utp->time.tv_sec) || + __get_user(txc->time.tv_usec, &utp->time.tv_usec) || + __get_user(txc->tick, &utp->tick) || + __get_user(txc->ppsfreq, &utp->ppsfreq) || + __get_user(txc->jitter, &utp->jitter) || + __get_user(txc->shift, &utp->shift) || + __get_user(txc->stabil, &utp->stabil) || + __get_user(txc->jitcnt, &utp->jitcnt) || + __get_user(txc->calcnt, &utp->calcnt) || + __get_user(txc->errcnt, &utp->errcnt) || + __get_user(txc->stbcnt, &utp->stbcnt)) + return -EFAULT; + + return 0; +} + +static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) +{ + if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || + __put_user(txc->modes, &utp->modes) || + __put_user(txc->offset, &utp->offset) || + __put_user(txc->freq, &utp->freq) || + __put_user(txc->maxerror, &utp->maxerror) || + __put_user(txc->esterror, &utp->esterror) || + __put_user(txc->status, &utp->status) || + __put_user(txc->constant, &utp->constant) || + __put_user(txc->precision, &utp->precision) || + __put_user(txc->tolerance, &utp->tolerance) || + __put_user(txc->time.tv_sec, &utp->time.tv_sec) || + __put_user(txc->time.tv_usec, &utp->time.tv_usec) || + __put_user(txc->tick, &utp->tick) || + __put_user(txc->ppsfreq, &utp->ppsfreq) || + __put_user(txc->jitter, &utp->jitter) || + __put_user(txc->shift, &utp->shift) || + __put_user(txc->stabil, &utp->stabil) || + __put_user(txc->jitcnt, &utp->jitcnt) || + __put_user(txc->calcnt, &utp->calcnt) || + __put_user(txc->errcnt, &utp->errcnt) || + __put_user(txc->stbcnt, &utp->stbcnt) || + __put_user(txc->tai, &utp->tai)) + return -EFAULT; + return 0; +} + asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { @@ -951,58 +1009,17 @@ asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) { struct timex txc; - int ret; + int err, ret; - memset(&txc, 0, sizeof(struct timex)); - - if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || - __get_user(txc.modes, &utp->modes) || - __get_user(txc.offset, &utp->offset) || - __get_user(txc.freq, &utp->freq) || - __get_user(txc.maxerror, &utp->maxerror) || - __get_user(txc.esterror, &utp->esterror) || - __get_user(txc.status, &utp->status) || - __get_user(txc.constant, &utp->constant) || - __get_user(txc.precision, &utp->precision) || - __get_user(txc.tolerance, &utp->tolerance) || - __get_user(txc.time.tv_sec, &utp->time.tv_sec) || - __get_user(txc.time.tv_usec, &utp->time.tv_usec) || - __get_user(txc.tick, &utp->tick) || - __get_user(txc.ppsfreq, &utp->ppsfreq) || - __get_user(txc.jitter, &utp->jitter) || - __get_user(txc.shift, &utp->shift) || - __get_user(txc.stabil, &utp->stabil) || - __get_user(txc.jitcnt, &utp->jitcnt) || - __get_user(txc.calcnt, &utp->calcnt) || - __get_user(txc.errcnt, &utp->errcnt) || - __get_user(txc.stbcnt, &utp->stbcnt)) - return -EFAULT; + err = compat_get_timex(&txc, utp); + if (err) + return err; ret = do_adjtimex(&txc); - if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || - __put_user(txc.modes, &utp->modes) || - __put_user(txc.offset, &utp->offset) || - __put_user(txc.freq, &utp->freq) || - __put_user(txc.maxerror, &utp->maxerror) || - __put_user(txc.esterror, &utp->esterror) || - __put_user(txc.status, &utp->status) || - __put_user(txc.constant, &utp->constant) || - __put_user(txc.precision, &utp->precision) || - __put_user(txc.tolerance, &utp->tolerance) || - __put_user(txc.time.tv_sec, &utp->time.tv_sec) || - __put_user(txc.time.tv_usec, &utp->time.tv_usec) || - __put_user(txc.tick, &utp->tick) || - __put_user(txc.ppsfreq, &utp->ppsfreq) || - __put_user(txc.jitter, &utp->jitter) || - __put_user(txc.shift, &utp->shift) || - __put_user(txc.stabil, &utp->stabil) || - __put_user(txc.jitcnt, &utp->jitcnt) || - __put_user(txc.calcnt, &utp->calcnt) || - __put_user(txc.errcnt, &utp->errcnt) || - __put_user(txc.stbcnt, &utp->stbcnt) || - __put_user(txc.tai, &utp->tai)) - ret = -EFAULT; + err = compat_put_timex(utp, &txc); + if (err) + return err; return ret; } |