* [PATCH] FRV: Fix error handling in is_user_addr_valid()
@ 2008-11-21 16:07 David Howells
2008-11-21 16:09 ` David Howells
0 siblings, 1 reply; 2+ messages in thread
From: David Howells @ 2008-11-21 16:07 UTC (permalink / raw)
To: torvalds, akpm; +Cc: dhowells, linux-kernel
Fix error handling in is_user_addr_valid() in NOMMU mode to check whether
find_vma() actually worked or not. This checks whether ptrace() is allowed to
access an address.
Signed-off-by: David Howells <dhowells@redhat.com>
---
arch/frv/kernel/ptrace.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/frv/kernel/ptrace.c b/arch/frv/kernel/ptrace.c
index e9af8de..5e7d401 100644
--- a/arch/frv/kernel/ptrace.c
+++ b/arch/frv/kernel/ptrace.c
@@ -83,7 +83,7 @@ static inline int is_user_addr_valid(struct task_struct *child,
struct vm_area_struct *vma;
vma = find_vma(child->mm, start);
- if (start >= vma->vm_start && start + len <= vma->vm_end)
+ if (vma && start >= vma->vm_start && start + len <= vma->vm_end)
return 0;
return -EIO;
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] FRV: Fix error handling in is_user_addr_valid()
2008-11-21 16:07 [PATCH] FRV: Fix error handling in is_user_addr_valid() David Howells
@ 2008-11-21 16:09 ` David Howells
0 siblings, 0 replies; 2+ messages in thread
From: David Howells @ 2008-11-21 16:09 UTC (permalink / raw)
To: torvalds, akpm; +Cc: dhowells, linux-kernel
David Howells <dhowells@redhat.com> wrote:
> Fix error handling in is_user_addr_valid() in NOMMU mode to check whether
> find_vma() actually worked or not. This checks whether ptrace() is allowed to
> access an address.
Ignore this patch, please. It's dependent on another patch you don't have
yet.
David
^ permalink raw reply [flat|nested] 2+ messages in thread
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2008-11-21 16:07 [PATCH] FRV: Fix error handling in is_user_addr_valid() David Howells
2008-11-21 16:09 ` David Howells
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