Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=35bab756b49bd148760a3bbd3c907cd74754dbb4
Commit: 35bab756b49bd148760a3bbd3c907cd74754dbb4
Parent: b3561ea9462b33a0bf824b4ca19a1ae84db81210
Author: Adrian Bunk <[EMAIL PROTECTED]>
AuthorDate: Tue May 8 00:30:49 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue May 8 11:15:13 2007 -0700
The scheduled -EINVAL for invalid timevals in setitimer
As scheduled, do_setitimer() now returns -EINVAL for invalid timeval.
Signed-off-by: Adrian Bunk <[EMAIL PROTECTED]>
Acked-by: Thomas Gleixner <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
Documentation/feature-removal-schedule.txt | 12 ------
kernel/itimer.c | 59 +--------------------------
2 files changed, 3 insertions(+), 68 deletions(-)
diff --git a/Documentation/feature-removal-schedule.txt
b/Documentation/feature-removal-schedule.txt
index 5a1f031..54d0e72 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -117,18 +117,6 @@ Who: Adrian Bunk <[EMAIL PROTECTED]>
---------------------------
-What: Usage of invalid timevals in setitimer
-When: March 2007
-Why: POSIX requires to validate timevals in the setitimer call. This
- was never done by Linux. The invalid (e.g. negative timevals) were
- silently converted to more or less random timeouts and intervals.
- Until the removal a per boot limited number of warnings is printed
- and the timevals are sanitized.
-
-Who: Thomas Gleixner <[EMAIL PROTECTED]>
-
----------------------------
-
What: Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports
(temporary transition config option provided until then)
The transition config option will also be removed at the same time.
diff --git a/kernel/itimer.c b/kernel/itimer.c
index 4523f33..3205e8e 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:
-
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