[Xen-devel] bug: slab corruption (net backend?)

[Gerd Knorr <kraxel@xxxxxxx>]

  Hi,

With the small debug patch below and CONFIG_DEBUG_SLAB=y I get
plenty of these messages in the dom0 kernel log as soon as I
start a domU:

  Slab corruption: start=dc423000, len=4096
  Slab name: xen-skb
  000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

This is hg1a7383f849896e60f8be631c96fa2b461f502615.

any idea?

  Gerd

Index: linux-2.6.11/mm/slab.c
===================================================================
--- linux-2.6.11.orig/mm/slab.c 2005-03-02 08:38:38.000000000 +0100
+++ linux-2.6.11/mm/slab.c      2005-07-07 11:31:47.000000000 +0200
@@ -1007,6 +1007,9 @@ static void print_objinfo(kmem_cache_t *
        int i, size;
        char *realobj;
 
+       if (cachep->name) {
+               printk(KERN_ERR "Slab name: %s\n", cachep->name);
+       }
        if (cachep->flags & SLAB_RED_ZONE) {
                printk(KERN_ERR "Redzone: 0x%lx/0x%lx.\n",
                        *dbg_redzone1(cachep, objp),

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