diff options
| author | Adrian Bunk <bunk@stusta.de> | 2007-05-08 00:30:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:13 -0700 |
| commit | 35bab756b49bd148760a3bbd3c907cd74754dbb4 (patch) | |
| tree | 8572b353c595a026931fe04e4bc20d1e50516e3f /kernel/itimer.c | |
| parent | b3561ea9462b33a0bf824b4ca19a1ae84db81210 (diff) | |
| download | kernel-common-35bab756b49bd148760a3bbd3c907cd74754dbb4.tar.gz kernel-common-35bab756b49bd148760a3bbd3c907cd74754dbb4.tar.bz2 kernel-common-35bab756b49bd148760a3bbd3c907cd74754dbb4.zip | |
The scheduled -EINVAL for invalid timevals in setitimer
As scheduled, do_setitimer() now returns -EINVAL for invalid timeval.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/itimer.c')
| -rw-r--r-- | kernel/itimer.c | 59 |
1 files changed, 3 insertions, 56 deletions
diff --git a/kernel/itimer.c b/kernel/itimer.c index 4523f3396f23..3205e8e114fa 100644 --- a/kernel/itimer.c +++ b/kernel/itimer.c @@ -138,59 +138,11 @@ enum hrtimer_restart it_real_fn(struct hrtimer *timer) } /* - * We do not care about correctness. We just sanitize the values so - * the ktime_t operations which expect normalized values do not - * break. This converts negative values to long timeouts similar to - * the code in kernel versions < 2.6.16 - * - * Print a limited number of warning messages when an invalid timeval - * is detected. - */ -static void fixup_timeval(struct timeval *tv, int interval) -{ - static int warnlimit = 10; - unsigned long tmp; - - if (warnlimit > 0) { - warnlimit--; - printk(KERN_WARNING - "setitimer: %s (pid = %d) provided " - "invalid timeval %s: tv_sec = %ld tv_usec = %ld\n", - current->comm, current->pid, - interval ? "it_interval" : "it_value", - tv->tv_sec, (long) tv->tv_usec); - } - - tmp = tv->tv_usec; - if (tmp >= USEC_PER_SEC) { - tv->tv_usec = tmp % USEC_PER_SEC; - tv->tv_sec += tmp / USEC_PER_SEC; - } - - tmp = tv->tv_sec; - if (tmp > LONG_MAX) - tv->tv_sec = LONG_MAX; -} - -/* * Returns true if the timeval is in canonical form */ #define timeval_valid(t) \ (((t)->tv_sec >= 0) && (((unsigned long) (t)->tv_usec) < USEC_PER_SEC)) -/* - * Check for invalid timevals, sanitize them and print a limited - * number of warnings. - */ -static void check_itimerval(struct itimerval *value) { - - if (unlikely(!timeval_valid(&value->it_value))) - fixup_timeval(&value->it_value, 0); - - if (unlikely(!timeval_valid(&value->it_interval))) - fixup_timeval(&value->it_interval, 1); -} - int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue) { struct task_struct *tsk = current; @@ -200,15 +152,10 @@ int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue) /* * Validate the timevals in value. - * - * Note: Although the spec requires that invalid values shall - * return -EINVAL, we just fixup the value and print a limited - * number of warnings in order not to break users of this - * historical misfeature. - * - * Scheduled for replacement in March 2007 */ - check_itimerval(value); + if (!timeval_valid(&value->it_value) || + !timeval_valid(&value->it_interval)) + return -EINVAL; switch (which) { case ITIMER_REAL: |