On Fri, 18 May 2007 15:17:36 +0300 Zilvinas Valinskas <[email protected]> wrote:
> Have found this in dmesg (well earlier because of initcall_debug) I've
> never noticed that during boot (scrolls away too fast). Anyway -
>
> [ 7.841871] NetLabel: Initializing
> [ 7.841983] NetLabel: domain hash size = 128
> [ 7.842095] NetLabel: protocols = UNLABELED CIPSOv4
> [ 7.842219] NetLabel: unlabeled traffic allowed by default
> [ 7.842338] BUG: at include/linux/slub_def.h:77 kmalloc_index()
> [ 7.842451]
> [ 7.842452] Call Trace:
> [ 7.842677] [<ffffffff8029215c>] get_slab+0x1cc/0x260
> [ 7.842791] [<ffffffff8029229d>] __kmalloc+0xd/0x80
> [ 7.842907] [<ffffffff802219ee>] cache_k8_northbridges+0x7e/0x100
> [ 7.843024] [<ffffffff8062bd13>] gart_iommu_init+0x33/0x5b0
> [ 7.843140] [<ffffffff8049f836>] netlbl_unlabel_acceptflg_set+0x86/0xf0
> [ 7.843255] [<ffffffff80626f49>] pci_iommu_init+0x9/0x20
> [ 7.843370] [<ffffffff806216d7>] kernel_init+0x157/0x330
> [ 7.843485] [<ffffffff8020b0f8>] child_rip+0xa/0x12
> [ 7.843601] [<ffffffff80373fd8>] acpi_ds_init_one_object+0x0/0x7c
> [ 7.843715] [<ffffffff80621580>] kernel_init+0x0/0x330
> [ 7.843829] [<ffffffff8020b0ee>] child_rip+0x0/0x12
> [ 7.843941]
> [ 7.844056] PCI-GART: No AMD northbridge found.
yup, thanks - the below patch will be in this evening's batch -> Linus.
From: Ben Collins <[email protected]>
kmalloc for flush_words resulted in zero size allocation when no
k8_northbridges existed. Short circuit the code path for this case.
Also remove uneeded zeroing of num_k8_northbridges just after checking if
it is zero.
Signed-off-by: Ben Collins <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Dave Jones <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
arch/x86_64/kernel/k8.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
diff -puN arch/x86_64/kernel/k8.c~avoid-zero-size-allocation-in-cache_k8_northbridges arch/x86_64/kernel/k8.c
--- a/arch/x86_64/kernel/k8.c~avoid-zero-size-allocation-in-cache_k8_northbridges
+++ a/arch/x86_64/kernel/k8.c
@@ -39,10 +39,10 @@ int cache_k8_northbridges(void)
{
int i;
struct pci_dev *dev;
+
if (num_k8_northbridges)
return 0;
- num_k8_northbridges = 0;
dev = NULL;
while ((dev = next_k8_northbridge(dev)) != NULL)
num_k8_northbridges++;
@@ -52,6 +52,11 @@ int cache_k8_northbridges(void)
if (!k8_northbridges)
return -ENOMEM;
+ if (!num_k8_northbridges) {
+ k8_northbridges[0] = NULL;
+ return 0;
+ }
+
flush_words = kmalloc(num_k8_northbridges * sizeof(u32), GFP_KERNEL);
if (!flush_words) {
kfree(k8_northbridges);
_
> Does this backtrace looks sane ? Hmm, netlabel code mixes with
> acpi_ds_init_one_object() ... Strange.
Backtraces can be pretty messy nowadays. CONFIG_FRAME_POINTER helps
improve them.
-
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