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In ue_attach_post_task(), initialize curvnet to vnet0 before calling if_attach().

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Before this patch, curvnet was NULL.
When the VIMAGE kernel option is enabled, this eliminates
kernel panics when USB ethernet devices are plugged in.

PR: 183835
Submitted by: Hiroo Oono <hiroo.ono at gmail dot com>
This commit is contained in:
Craig Rodrigues 2014-02-18 01:20:26 +00:00
parent 294d0d88fc
commit 458a36d594
1 changed files with 4 additions and 0 deletions
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4
sys/dev/usb/net/usb_ethernet.c
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@ -208,6 +208,7 @@ ue_attach_post_task(struct usb_proc_msg *_task)
sysctl_ctx_init(&ue->ue_sysctl_ctx);
error = 0;
CURVNET_SET_QUIET(vnet0);
ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(ue->ue_dev, "could not allocate ifnet\n");
@ -254,6 +255,8 @@ ue_attach_post_task(struct usb_proc_msg *_task)
if (ifp->if_capabilities & IFCAP_VLAN_MTU)
ifp->if_hdrlen = sizeof(struct ether_vlan_header);
CURVNET_RESTORE();
snprintf(num, sizeof(num), "%u", ue->ue_unit);
ue->ue_sysctl_oid = SYSCTL_ADD_NODE(&ue->ue_sysctl_ctx,
&SYSCTL_NODE_CHILDREN(_net, ue),
@ -267,6 +270,7 @@ ue_attach_post_task(struct usb_proc_msg *_task)
return;
fail:
CURVNET_RESTORE();
free_unr(ueunit, ue->ue_unit);
if (ue->ue_ifp != NULL) {
if_free(ue->ue_ifp);