* [PATCH] x86: check for ioremap() failure in copy_oldmem_page()
@ 2008-09-21 14:27 Akinobu Mita
2008-09-22 10:15 ` Ingo Molnar
0 siblings, 1 reply; 3+ messages in thread
From: Akinobu Mita @ 2008-09-21 14:27 UTC (permalink / raw)
To: linux-kernel; +Cc: Thomas Gleixner, Ingo Molnar, H. Peter Anvin
Add a check for ioremap() failure in copy_oldmem_page().
This patch also includes small coding style fixes.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---
arch/x86/kernel/crash_dump_64.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
Index: 2.6-git/arch/x86/kernel/crash_dump_64.c
===================================================================
--- 2.6-git.orig/arch/x86/kernel/crash_dump_64.c
+++ 2.6-git/arch/x86/kernel/crash_dump_64.c
@@ -33,14 +33,16 @@ ssize_t copy_oldmem_page(unsigned long p
return 0;
vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE);
+ if (!vaddr)
+ return -ENOMEM;
if (userbuf) {
- if (copy_to_user(buf, (vaddr + offset), csize)) {
+ if (copy_to_user(buf, vaddr + offset, csize)) {
iounmap(vaddr);
return -EFAULT;
}
} else
- memcpy(buf, (vaddr + offset), csize);
+ memcpy(buf, vaddr + offset, csize);
iounmap(vaddr);
return csize;
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] x86: check for ioremap() failure in copy_oldmem_page()
2008-09-21 14:27 [PATCH] x86: check for ioremap() failure in copy_oldmem_page() Akinobu Mita
@ 2008-09-22 10:15 ` Ingo Molnar
2008-09-22 12:38 ` Akinobu Mita
0 siblings, 1 reply; 3+ messages in thread
From: Ingo Molnar @ 2008-09-22 10:15 UTC (permalink / raw)
To: Akinobu Mita
Cc: linux-kernel, Thomas Gleixner, Ingo Molnar, H. Peter Anvin,
Eric W. Biederman
* Akinobu Mita <akinobu.mita@gmail.com> wrote:
> Add a check for ioremap() failure in copy_oldmem_page().
> This patch also includes small coding style fixes.
>
> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
applied to tip/x86/crashdump, thanks!
I'm curious, have you found this bug via the fault-injection framework,
or via code review?
Ingo
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] x86: check for ioremap() failure in copy_oldmem_page()
2008-09-22 10:15 ` Ingo Molnar
@ 2008-09-22 12:38 ` Akinobu Mita
0 siblings, 0 replies; 3+ messages in thread
From: Akinobu Mita @ 2008-09-22 12:38 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, Thomas Gleixner, Ingo Molnar, H. Peter Anvin,
Eric W. Biederman
2008/9/22 Ingo Molnar <mingo@elte.hu>:
>
> * Akinobu Mita <akinobu.mita@gmail.com> wrote:
>
>> Add a check for ioremap() failure in copy_oldmem_page().
>> This patch also includes small coding style fixes.
>>
>> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
>
> applied to tip/x86/crashdump, thanks!
>
> I'm curious, have you found this bug via the fault-injection framework,
> or via code review?
I found it via code review.
But I forgot why I was looking at crash_dump_64.c...
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-09-22 12:38 UTC | newest]
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2008-09-21 14:27 [PATCH] x86: check for ioremap() failure in copy_oldmem_page() Akinobu Mita
2008-09-22 10:15 ` Ingo Molnar
2008-09-22 12:38 ` Akinobu Mita
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