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futex: fix futex_wait_setup key handling

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If the get_futex_key() call were to fail, the existing code would
try and put_futex_key() prior to returning.  This patch makes sure
we only put_futex_key() if get_futex_key() succeeded.

Reported-by: Clark Williams <williams@redhat.com>
Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
LKML-Reference: <20090410165005.14342.16973.stgit@Aeon>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Darren Hart 2009-04-10 09:50:05 -07:00 committed by Thomas Gleixner
parent d2de688891
commit a5a2a0c7fa
1 changed files with 1 additions and 1 deletions
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2
kernel/futex.c
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@ -1668,7 +1668,7 @@ retry:
q->key = FUTEX_KEY_INIT;
ret = get_futex_key(uaddr, fshared, &q->key);
if (unlikely(ret != 0))
goto out;
return ret;
retry_private:
*hb = queue_lock(q);