Jeremy Fitzhardinge, le Fri 14 Aug 2009 15:44:49 -0700, a écrit :
> I'm trying to boot a 32-bit PV guest on a 64-bit xen+dom0 system, and it
> crashes as soon as I select a kernel:
>
>
> Booting 'Fedora (2.6.27.19-170.2.35.fc10.i686.PAE)'
>
> root (hd0,0)
> Error ENOENT when reading the backend path device/vkbd/0/backend
I guess you do not have pvfb enable?
> Page fault at linear address 0x1c, eip 0x4b6ee, regs 0xb4ff7c, sp 0xb4fff0,
> our_sp 0xb4ff50, code 2
> Thread: kbdfront
Oops, dev->backend isn't allocated at this point and dev isn't zeroed,
here is a patch.
Samuel
Zero kbdfront and fbfront dev structures to fix free_kbdfront() and
free_fbfront() on error.
Signed-Off-By: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
diff -r 41b2c4e4f674 extras/mini-os/fbfront.c
--- a/extras/mini-os/fbfront.c Wed Jul 29 09:20:46 2009 +0100
+++ b/extras/mini-os/fbfront.c Mon Aug 17 14:45:43 2009 +0200
@@ -80,6 +80,7 @@
printk("******************* KBDFRONT for %s **********\n\n\n", nodename);
dev = malloc(sizeof(*dev));
+ memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
#ifdef HAVE_LIBC
dev->fd = -1;
@@ -403,6 +404,7 @@
printk("******************* FBFRONT for %s **********\n\n\n", nodename);
dev = malloc(sizeof(*dev));
+ memset(dev, 0, sizeof(*dev));
dev->nodename = strdup(nodename);
#ifdef HAVE_LIBC
dev->fd = -1;
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