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posix-timers: Fix oops in clock_nanosleep() with CLOCK_MONOTONIC_RAW

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Prevent calling do_nanosleep() with clockid
CLOCK_MONOTONIC_RAW, it may cause oops, such as NULL pointer
dereference.

Signed-off-by: Hiroshi Shimamoto <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: John Stultz <[email protected]>
Cc: <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Hiroshi Shimamoto 2009-08-03 11:48:19 +09:00 • committed by Ingo Molnar
commit 70d715fd05
1 changed files with 7 additions and 0 deletions
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7
kernel/posix-timers.c
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@ -202,6 +202,12 @@ static int no_timer_create(struct k_itimer *new_timer)
return -EOPNOTSUPP;
}
static int no_nsleep(const clockid_t which_clock, int flags,
struct timespec *tsave, struct timespec __user *rmtp)
{
return -EOPNOTSUPP;
}
/*
* Return nonzero if we know a priori this clockid_t value is bogus.
*/
@ -254,6 +260,7 @@ static __init int init_posix_timers(void)
.clock_get = posix_get_monotonic_raw,
.clock_set = do_posix_clock_nosettime,
.timer_create = no_timer_create,
.nsleep = no_nsleep,
};
register_posix_clock(CLOCK_REALTIME, &clock_realtime);