From: Patrick McHardy <[email protected]>
[NET]: Fix gen_estimator timer removal race
As noticed by Jarek Poplawski <[email protected]>, the timer removal in
gen_kill_estimator races with the timer function rearming the timer.
Check whether the timer list is empty before rearming the timer
in the timer function to fix this.
Signed-off-by: Patrick McHardy <[email protected]>
Acked-by: Jarek Poplawski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/core/gen_estimator.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/core/gen_estimator.c
+++ b/net/core/gen_estimator.c
@@ -128,7 +128,8 @@ static void est_timer(unsigned long arg)
spin_unlock(e->stats_lock);
}
- mod_timer(&elist[idx].timer, jiffies + ((HZ<<idx)/4));
+ if (elist[idx].list != NULL)
+ mod_timer(&elist[idx].timer, jiffies + ((HZ<<idx)/4));
read_unlock(&est_lock);
}
--
-
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