Re: [PATCH] fix sigqueue accounting for posix-timers broken by new RLIMIT_SIGPENDING tracking code

[Chris Wright]

* Roland McGrath (roland@xxxxxxxxxx) wrote:
> 
> The introduction of RLIMIT_SIGPENDING and the associated tracking code was
> broken for the case of preallocated sigqueue elements, i.e. posix-timers.
> It wrongly includes the timer's preallocated sigqueue structs in the count
> towards the per-user when allocating them, but (rightly) does not decrement
> the count when they are freed.  

Are you sure?  IOW, are you seeing a leak of the count?  The sigqueue
structure has a lifetime the same as the timer, IIRC.  So each time the
signal is sent/received there's no accounting, because it's reused.
But timer create/delete does sigqueue_alloc -> __sigqueue_alloc which
does the inc. and sigqueue_free -> __sigqueue_free which does the dec.
I'm fairly sure I had tested this.

thanks,
-chris
-- 
Linux Security Modules     http://lsm.immunix.org     http://lsm.bkbits.net
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/