diff options
Diffstat (limited to 'meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0022-ivshmem-net-Switch-to-relative-descriptor-addresses.patch')
| -rw-r--r-- | meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0022-ivshmem-net-Switch-to-relative-descriptor-addresses.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0022-ivshmem-net-Switch-to-relative-descriptor-addresses.patch b/meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0022-ivshmem-net-Switch-to-relative-descriptor-addresses.patch new file mode 100644 index 00000000..aca00e26 --- /dev/null +++ b/meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0022-ivshmem-net-Switch-to-relative-descriptor-addresses.patch @@ -0,0 +1,49 @@ +From d1a0011e9857e105e38d9a0ea6fd7b8e7e6d8dc9 Mon Sep 17 00:00:00 2001 +From: Jan Kiszka <jan.kiszka@siemens.com> +Date: Tue, 3 Jan 2017 08:50:01 +0100 +Subject: [PATCH 22/32] ivshmem-net: Switch to relative descriptor addresses + +Make sure that we do not depend on identity-mapped shared memory +regions. + +This also fixes an off-by-one in the range check of ivshm_net_desc_data. + +Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> +--- + drivers/net/ivshmem-net.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +diff --git a/drivers/net/ivshmem-net.c b/drivers/net/ivshmem-net.c +index 9f307ec4d677..0e770ca293a4 100644 +--- a/drivers/net/ivshmem-net.c ++++ b/drivers/net/ivshmem-net.c +@@ -123,14 +123,14 @@ static void *ivshm_net_desc_data(struct ivshm_net *in, + struct vring_desc *desc, + u32 *len) + { +- u64 addr = READ_ONCE(desc->addr); ++ u64 offs = READ_ONCE(desc->addr); + u32 dlen = READ_ONCE(desc->len); + void *data; + +- if (addr < in->shmaddr || desc->addr > in->shmaddr + in->shmlen) ++ if (offs >= in->shmlen) + return NULL; + +- data = in->shm + (addr - in->shmaddr); ++ data = in->shm + offs; + + if (data < q->data || data >= q->end) + return NULL; +@@ -317,7 +317,7 @@ static int ivshm_net_tx_frame(struct net_device *ndev, struct sk_buff *skb) + buf = tx->data + head; + skb_copy_and_csum_dev(skb, buf); + +- desc->addr = in->shmaddr + (buf - in->shm); ++ desc->addr = buf - in->shm; + desc->len = skb->len; + + avail = tx->last_avail_idx++ & (vr->num - 1); +-- +2.11.0 + |