From: Roel Kluin <roel.kluin@gmail.com>
To: liqin.chen@sunplusct.com, arnd@arndb.de,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] score: Fix dereference of NULL pointer in local_flush_tlb_page()
Date: Mon, 08 Feb 2010 22:17:34 +0100 [thread overview]
Message-ID: <4B707F6E.2090108@gmail.com> (raw)
Don't dereference vma if it's NULL.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
---
diff --git a/arch/score/mm/tlb-score.c b/arch/score/mm/tlb-score.c
index 4fa5aa5..6fdb100 100644
--- a/arch/score/mm/tlb-score.c
+++ b/arch/score/mm/tlb-score.c
@@ -158,7 +158,7 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
{
- if (!vma || vma->vm_mm->context != 0) {
+ if (vma && vma->vm_mm->context != 0) {
unsigned long flags;
int oldpid, newpid, idx;
unsigned long vma_ASID = vma->vm_mm->context;
reply other threads:[~2010-02-08 21:10 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4B707F6E.2090108@gmail.com \
--to=roel.kluin@gmail.com \
--cc=arnd@arndb.de \
--cc=linux-kernel@vger.kernel.org \
--cc=liqin.chen@sunplusct.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox