search for: gntalloc

...pecially is when using Xen''s PTE modification for grant mappings owned by another domain. Otherwise, the area does not require VM_DONTCOPY and VM_PFNMAP, since it can be accessed just like any other page of RAM. Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov> --- drivers/xen/gntalloc.c | 14 ++++++++++++-- drivers/xen/gntdev.c | 16 ++++++++++++++-- 2 files changed, 26 insertions(+), 4 deletions(-) diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index a7ffdfe..f6832f4 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -427,6 +427,17 @@ stati...

...d gref_ids would be smaller than expected. If the you triggered another integer overflow in "if (gref_size + op.count > limit)" then you'd probably get memory corruption inside add_grefs(). Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index f6832f4..23c60cf 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -280,7 +280,7 @@ static long gntalloc_ioctl_alloc(struct gntalloc_file_private_data *priv, goto out; } - gref_ids = kzalloc(sizeof(gref_ids[0]) * op.count, GFP_TEMPORARY); +...

...d gref_ids would be smaller than expected. If the you triggered another integer overflow in "if (gref_size + op.count > limit)" then you'd probably get memory corruption inside add_grefs(). Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index f6832f4..23c60cf 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -280,7 +280,7 @@ static long gntalloc_ioctl_alloc(struct gntalloc_file_private_data *priv, goto out; } - gref_ids = kzalloc(sizeof(gref_ids[0]) * op.count, GFP_TEMPORARY); +...

...d gref_ids would be smaller than expected. If the you triggered another integer overflow in "if (gref_size + op.count > limit)" then you'd probably get memory corruption inside add_grefs(). Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index f6832f4..23c60cf 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -280,7 +280,7 @@ static long gntalloc_ioctl_alloc(struct gntalloc_file_private_data *priv, goto out; } - gref_ids = kzalloc(sizeof(gref_ids[0]) * op.count, GFP_TEMPORARY); +...

...nt_foreign_access() returns an int type, so we can add a cast here, and it doesn't cause any problems. gnttab_grant_foreign_access() can return a variety of errors including -ENOSPC, -ENOSYS and -ENOMEM. Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index 23c60cf..e1c4c6e 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -135,7 +135,7 @@ static int add_grefs(struct ioctl_gntalloc_alloc_gref *op, /* Grant foreign access to the page. */ gref->gref_id = gnttab_grant_foreign_access(op->domid...

...nt_foreign_access() returns an int type, so we can add a cast here, and it doesn't cause any problems. gnttab_grant_foreign_access() can return a variety of errors including -ENOSPC, -ENOSYS and -ENOMEM. Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index 23c60cf..e1c4c6e 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -135,7 +135,7 @@ static int add_grefs(struct ioctl_gntalloc_alloc_gref *op, /* Grant foreign access to the page. */ gref->gref_id = gnttab_grant_foreign_access(op->domid...

...nt_foreign_access() returns an int type, so we can add a cast here, and it doesn't cause any problems. gnttab_grant_foreign_access() can return a variety of errors including -ENOSPC, -ENOSYS and -ENOMEM. Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com> diff --git a/drivers/xen/gntalloc.c b/drivers/xen/gntalloc.c index 23c60cf..e1c4c6e 100644 --- a/drivers/xen/gntalloc.c +++ b/drivers/xen/gntalloc.c @@ -135,7 +135,7 @@ static int add_grefs(struct ioctl_gntalloc_alloc_gref *op, /* Grant foreign access to the page. */ gref->gref_id = gnttab_grant_foreign_access(op->domid...

Hi, I am trying to run libvchan on ARM Fast Model for VExpress platform for using inter domain communication. But there are some errors. I am attaching the strace outputs for vchan-node1 run in dom0 and domU. Has anybody faced these issues before. Xl console 1The command is Usage: vchan-node1 [client|server] [write|read] domid nodepath my nodepath is - /local/domain/1/data/vchan-2-1 Regards

Hello, I think this might have been discussed numerous times on this mailing-list, if there is a relevant post I can refer to please point that to me. What I am trying to do is set up a shared memory/event-channels between dom0 and domU''s via socket calls because I cannot use existing front-end/back-end driver mechanism since it relies on devices aka vif, vbd type of device to be created

What is the best kernel to run? is it better to run 3.4.4 or one from xen git? _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users

...r performance. xm block-attach 0 tap:vmdk:/mnt/backup/3MSYDDP01/3MSYDDP01_2-flat.vmdk /dev/xvda1 w 0 However /dev/xvda1 is not created. I have loaded to following modules for good measure: modprobe blktap modprobe xen-blkback modprobe xen-blkfront modprobe xen-evtchn modprobe xenfs modprobe xen-gntalloc modprobe xen-gntdev modprobe xen-netback modprobe xen-netfront modprobe xen-pciback modprobe xen-pcifront modprobe xen_wdt And tried manually creating the blokc device beforehand. mknod /dev/xvda1 b 220 0 I searched for answers and found nothing that suggests that shouldn't work? -- System...

Hello Community, I encountered an error while running "xm console domU". Here is the running script: # xm console domU xenconsole: Could not read tty from store: No such file or directory I googled and found out that this issue is mostly result from forgetting starting xenconsole service. However, after I started xenconsole, the issue is still there. Please see: #

Hi, I build Xen 4.1.1 on a Gentoo base dom0. Everything is working great. I tried one of Joseph Glanville''s PV-HVM image (debian6) and its working as it should. Now l''im trying to build a Gentoo based domU with then same specs as Joseph''s PV-HVM. I used a copy of the .cfg and adapted to my needs to make the gentoo work. when booting the minimal install image using