From: Keir Fraser <keir.fraser@citrix.com>
Date: Mon, 10 May 2010 08:22:52 +0000 (+0100)
Subject: xentrace: fix bug in t_info size
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~12209
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=268d40f9b898c545fbb27a5116ac8add34dde9e8;p=xen.git

xentrace: fix bug in t_info size

t_info size should be in bytes, not pages.  This fixes a bug
that crashes the hypervisor if the total number of all pages
is more than 1024 but less than 2048.

Signed-off-by: George Dunlap <george.dunlap@citrix.com>
---

diff --git a/xen/common/trace.c b/xen/common/trace.c
index 110f3b8c7d..cc29c8b970 100644
--- a/xen/common/trace.c
+++ b/xen/common/trace.c
@@ -340,7 +340,7 @@ int tb_control(xen_sysctl_tbuf_op_t *tbc)
     case XEN_SYSCTL_TBUFOP_get_info:
         tbc->evt_mask   = tb_event_mask;
         tbc->buffer_mfn = t_info ? virt_to_mfn(t_info) : 0;
-        tbc->size = T_INFO_PAGES;
+        tbc->size = T_INFO_PAGES * PAGE_SIZE;
         break;
     case XEN_SYSCTL_TBUFOP_set_cpu_mask:
         xenctl_cpumap_to_cpumask(&tb_cpu_mask, &tbc->cpu_mask);