On Friday 14 December 2007 18:51:06 Ananth N Mavinakayanahalli wrote:
> On Thu, Dec 13, 2007 at 11:09:16PM -0800, Andrew Morton wrote:
> > regular_kernel_text_address()? Dunno.
>
> Sounds better :-)
The better answer was to invert it and use "discarded_kernel_text_address()",
which is what you actually care about (rather than the details of whether it
was init or not).
However, you have, in fact, located a potential bug. If someone were to
kmalloc module text, then symbol_put() could fail.
How's this?
---
Don't report discarded init pages as kernel text.
In theory this could cause a bug in symbol_put() if an arch used for
a module: we might think the symbol belongs to the core kernel.
The downside is that this might make backtraces through (discarded)
init functions harder to read on some archs.
Signed-off-by: Rusty Russell <[email protected]>
diff -r 0eabf082c13a kernel/extable.c
--- a/kernel/extable.c Tue Dec 18 13:51:13 2007 +1100
+++ b/kernel/extable.c Tue Dec 18 15:53:01 2007 +1100
@@ -46,7 +46,8 @@ int core_kernel_text(unsigned long addr)
addr <= (unsigned long)_etext)
return 1;
- if (addr >= (unsigned long)_sinittext &&
+ if (system_state == SYSTEM_BOOTING &&
+ addr >= (unsigned long)_sinittext &&
addr <= (unsigned long)_einittext)
return 1;
return 0;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
