From: Oleg Nesterov <oleg@redhat.com>
To: Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Anton Arapov <anton@redhat.com>, Frank Eigler <fche@redhat.com>,
Josh Stone <jistone@redhat.com>,
"Suzuki K. Poulose" <suzuki@in.ibm.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 7/7] uprobes: Kill the bogus IS_ERR_VALUE(xol_vaddr) check
Date: Mon, 31 Dec 2012 18:52:32 +0100 [thread overview]
Message-ID: <20121231175232.GA32118@redhat.com> (raw)
In-Reply-To: <20121231175150.GA32066@redhat.com>
utask->xol_vaddr is either zero or valid, remove the bogus
IS_ERR_VALUE() check in xol_free_insn_slot().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
kernel/events/uprobes.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index ad1245d..ed4fcbe 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1223,8 +1223,7 @@ static void xol_free_insn_slot(struct task_struct *tsk)
return;
slot_addr = tsk->utask->xol_vaddr;
-
- if (unlikely(!slot_addr || IS_ERR_VALUE(slot_addr)))
+ if (unlikely(!slot_addr))
return;
area = tsk->mm->uprobes_state.xol_area;
--
1.5.5.1
next prev parent reply other threads:[~2012-12-31 17:52 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-31 17:51 [PATCH 0/7] uprobes: alloc utask/xol_area cleanups and minor fix Oleg Nesterov
2012-12-31 17:52 ` [PATCH 1/7] uprobes: Move alloc_page() from xol_add_vma() to xol_alloc_area() Oleg Nesterov
2013-01-07 9:16 ` Anton Arapov
2013-01-07 16:11 ` Oleg Nesterov
2013-01-08 11:46 ` Srikar Dronamraju
2013-01-08 17:58 ` Oleg Nesterov
2013-01-09 17:44 ` Srikar Dronamraju
2012-12-31 17:52 ` [PATCH 2/7] uprobes: Fold xol_alloc_area() into get_xol_area() Oleg Nesterov
2013-01-08 11:55 ` Srikar Dronamraju
2013-01-09 10:16 ` Anton Arapov
2013-01-09 15:51 ` Oleg Nesterov
2012-12-31 17:52 ` [PATCH 3/7] uprobes: Turn add_utask() into get_utask() Oleg Nesterov
2013-01-08 11:57 ` Srikar Dronamraju
2012-12-31 17:52 ` [PATCH 4/7] uprobes: Do not play with utask in xol_get_insn_slot() Oleg Nesterov
2013-01-08 12:07 ` Srikar Dronamraju
2012-12-31 17:52 ` [PATCH 5/7] uprobes: Fix utask->xol_vaddr leak in pre_ssout() Oleg Nesterov
2013-01-08 12:13 ` Srikar Dronamraju
2013-01-08 17:44 ` Oleg Nesterov
2013-01-10 12:48 ` Srikar Dronamraju
2012-12-31 17:52 ` [PATCH 6/7] uprobes: Do not allocate current->utask unnecessary Oleg Nesterov
2013-01-08 12:20 ` Srikar Dronamraju
2013-01-08 18:13 ` Oleg Nesterov
2012-12-31 17:52 ` Oleg Nesterov [this message]
2013-01-08 12:23 ` [PATCH 7/7] uprobes: Kill the bogus IS_ERR_VALUE(xol_vaddr) check Srikar Dronamraju
2013-01-09 10:25 ` [PATCH 0/7] uprobes: alloc utask/xol_area cleanups and minor fix Anton Arapov
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