* [PATCH] kexec-tools: powerpc: dt_reserve doesn't allocate enough memory for large properties
@ 2011-07-25 7:35 Anton Blanchard
2011-07-25 11:45 ` Simon Horman
0 siblings, 1 reply; 2+ messages in thread
From: Anton Blanchard @ 2011-07-25 7:35 UTC (permalink / raw)
To: horms; +Cc: kexec
On a large ppc64 box I got the following error from kexec -l:
unrecoverable error: could not read "/proc/device-tree/ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory": Bad address
dt_reserve was assuming a property was never larger than
INIT_TREE_WORDS (65536), but on this box ibm,dynamic-memory is
119995 words.
Allocate INIT_TREE_WORDS or the number of words requested, whatever
is larger.
Signed-off-by: Anton Blanchard <anton@samba.org>
---
diff --git a/kexec/arch/ppc64/fs2dt.c b/kexec/arch/ppc64/fs2dt.c
index 4400f13..d2b6b18 100644
--- a/kexec/arch/ppc64/fs2dt.c
+++ b/kexec/arch/ppc64/fs2dt.c
@@ -57,9 +57,14 @@ extern int my_debug;
*/
void dt_reserve(unsigned **dt_ptr, unsigned words)
{
+ unsigned int sz = INIT_TREE_WORDS;
+
+ if (sz < words)
+ sz = words;
+
if (((*dt_ptr - dt_base) + words) >= dt_cur_size) {
int offset;
- unsigned int new_size = dt_cur_size + INIT_TREE_WORDS;
+ unsigned int new_size = dt_cur_size + sz;
unsigned *new_dt = realloc(dt_base, new_size*4);
if (!new_dt)
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] kexec-tools: powerpc: dt_reserve doesn't allocate enough memory for large properties
2011-07-25 7:35 [PATCH] kexec-tools: powerpc: dt_reserve doesn't allocate enough memory for large properties Anton Blanchard
@ 2011-07-25 11:45 ` Simon Horman
0 siblings, 0 replies; 2+ messages in thread
From: Simon Horman @ 2011-07-25 11:45 UTC (permalink / raw)
To: Anton Blanchard; +Cc: kexec
On Mon, Jul 25, 2011 at 05:35:42PM +1000, Anton Blanchard wrote:
>
> On a large ppc64 box I got the following error from kexec -l:
>
> unrecoverable error: could not read "/proc/device-tree/ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory": Bad address
>
> dt_reserve was assuming a property was never larger than
> INIT_TREE_WORDS (65536), but on this box ibm,dynamic-memory is
> 119995 words.
>
> Allocate INIT_TREE_WORDS or the number of words requested, whatever
Thanks, applied.
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kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
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2011-07-25 7:35 [PATCH] kexec-tools: powerpc: dt_reserve doesn't allocate enough memory for large properties Anton Blanchard
2011-07-25 11:45 ` Simon Horman
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