Update Linux to v5.4.148
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.148.tar.gz
Change-Id: Ib3d26c5ba9b022e2e03533005c4fed4d7c30b61b
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index a8d3141..7c40ae0 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -68,6 +68,14 @@
#include <linux/bpf.h>
#include <linux/bpf_trace.h>
#include <linux/mutex.h>
+#include <linux/ieee802154.h>
+#include <linux/if_ltalk.h>
+#include <uapi/linux/if_fddi.h>
+#include <uapi/linux/if_hippi.h>
+#include <uapi/linux/if_fc.h>
+#include <net/ax25.h>
+#include <net/rose.h>
+#include <net/6lowpan.h>
#include <linux/uaccess.h>
#include <linux/proc_fs.h>
@@ -313,8 +321,8 @@
tfile->napi_enabled = napi_en;
tfile->napi_frags_enabled = napi_en && napi_frags;
if (napi_en) {
- netif_napi_add(tun->dev, &tfile->napi, tun_napi_poll,
- NAPI_POLL_WEIGHT);
+ netif_tx_napi_add(tun->dev, &tfile->napi, tun_napi_poll,
+ NAPI_POLL_WEIGHT);
napi_enable(&tfile->napi);
}
}
@@ -1469,7 +1477,7 @@
int i;
if (it->nr_segs > MAX_SKB_FRAGS + 1)
- return ERR_PTR(-ENOMEM);
+ return ERR_PTR(-EMSGSIZE);
local_bh_disable();
skb = napi_get_frags(&tfile->napi);
@@ -1715,8 +1723,12 @@
alloc_frag->offset += buflen;
}
err = tun_xdp_act(tun, xdp_prog, &xdp, act);
- if (err < 0)
- goto err_xdp;
+ if (err < 0) {
+ if (act == XDP_REDIRECT || act == XDP_TX)
+ put_page(alloc_frag->page);
+ goto out;
+ }
+
if (err == XDP_REDIRECT)
xdp_do_flush_map();
if (err != XDP_PASS)
@@ -1730,8 +1742,6 @@
return __tun_build_skb(tfile, alloc_frag, buf, buflen, len, pad);
-err_xdp:
- put_page(alloc_frag->page);
out:
rcu_read_unlock();
local_bh_enable();
@@ -1906,8 +1916,11 @@
skb->dev = tun->dev;
break;
case IFF_TAP:
- if (!frags)
- skb->protocol = eth_type_trans(skb, tun->dev);
+ if (frags && !pskb_may_pull(skb, ETH_HLEN)) {
+ err = -ENOMEM;
+ goto drop;
+ }
+ skb->protocol = eth_type_trans(skb, tun->dev);
break;
}
@@ -1923,6 +1936,7 @@
skb_reset_network_header(skb);
skb_probe_transport_header(skb);
+ skb_record_rx_queue(skb, tfile->queue_index);
if (skb_xdp) {
struct bpf_prog *xdp_prog;
@@ -1936,6 +1950,10 @@
if (ret != XDP_PASS) {
rcu_read_unlock();
local_bh_enable();
+ if (frags) {
+ tfile->napi.skb = NULL;
+ mutex_unlock(&tfile->napi_mutex);
+ }
return total_len;
}
}
@@ -1959,9 +1977,12 @@
}
if (frags) {
+ u32 headlen;
+
/* Exercise flow dissector code path. */
- u32 headlen = eth_get_headlen(tun->dev, skb->data,
- skb_headlen(skb));
+ skb_push(skb, ETH_HLEN);
+ headlen = eth_get_headlen(tun->dev, skb->data,
+ skb_headlen(skb));
if (unlikely(headlen > skb_headlen(skb))) {
this_cpu_inc(tun->pcpu_stats->rx_dropped);
@@ -2015,12 +2036,15 @@
struct tun_file *tfile = file->private_data;
struct tun_struct *tun = tun_get(tfile);
ssize_t result;
+ int noblock = 0;
if (!tun)
return -EBADFD;
- result = tun_get_user(tun, tfile, NULL, from,
- file->f_flags & O_NONBLOCK, false);
+ if ((file->f_flags & O_NONBLOCK) || (iocb->ki_flags & IOCB_NOWAIT))
+ noblock = 1;
+
+ result = tun_get_user(tun, tfile, NULL, from, noblock, false);
tun_put(tun);
return result;
@@ -2241,10 +2265,15 @@
struct tun_file *tfile = file->private_data;
struct tun_struct *tun = tun_get(tfile);
ssize_t len = iov_iter_count(to), ret;
+ int noblock = 0;
if (!tun)
return -EBADFD;
- ret = tun_do_read(tun, tfile, to, file->f_flags & O_NONBLOCK, NULL);
+
+ if ((file->f_flags & O_NONBLOCK) || (iocb->ki_flags & IOCB_NOWAIT))
+ noblock = 1;
+
+ ret = tun_do_read(tun, tfile, to, noblock, NULL);
ret = min_t(ssize_t, ret, len);
if (ret > 0)
iocb->ki_pos = ret;
@@ -2486,6 +2515,7 @@
skb->protocol = eth_type_trans(skb, tun->dev);
skb_reset_network_header(skb);
skb_probe_transport_header(skb);
+ skb_record_rx_queue(skb, tfile->queue_index);
if (skb_xdp) {
err = do_xdp_generic(xdp_prog, skb);
@@ -2497,7 +2527,6 @@
!tfile->detached)
rxhash = __skb_get_hash_symmetric(skb);
- skb_record_rx_queue(skb, tfile->queue_index);
netif_receive_skb(skb);
/* No need for get_cpu_ptr() here since this function is
@@ -3022,6 +3051,45 @@
return __tun_set_ebpf(tun, prog_p, prog);
}
+/* Return correct value for tun->dev->addr_len based on tun->dev->type. */
+static unsigned char tun_get_addr_len(unsigned short type)
+{
+ switch (type) {
+ case ARPHRD_IP6GRE:
+ case ARPHRD_TUNNEL6:
+ return sizeof(struct in6_addr);
+ case ARPHRD_IPGRE:
+ case ARPHRD_TUNNEL:
+ case ARPHRD_SIT:
+ return 4;
+ case ARPHRD_ETHER:
+ return ETH_ALEN;
+ case ARPHRD_IEEE802154:
+ case ARPHRD_IEEE802154_MONITOR:
+ return IEEE802154_EXTENDED_ADDR_LEN;
+ case ARPHRD_PHONET_PIPE:
+ case ARPHRD_PPP:
+ case ARPHRD_NONE:
+ return 0;
+ case ARPHRD_6LOWPAN:
+ return EUI64_ADDR_LEN;
+ case ARPHRD_FDDI:
+ return FDDI_K_ALEN;
+ case ARPHRD_HIPPI:
+ return HIPPI_ALEN;
+ case ARPHRD_IEEE802:
+ return FC_ALEN;
+ case ARPHRD_ROSE:
+ return ROSE_ADDR_LEN;
+ case ARPHRD_NETROM:
+ return AX25_ADDR_LEN;
+ case ARPHRD_LOCALTLK:
+ return LTALK_ALEN;
+ default:
+ return 0;
+ }
+}
+
static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
unsigned long arg, int ifreq_len)
{
@@ -3177,6 +3245,7 @@
ret = -EBUSY;
} else {
tun->dev->type = (int) arg;
+ tun->dev->addr_len = tun_get_addr_len(tun->dev->type);
tun_debug(KERN_INFO, tun, "linktype set to %d\n",
tun->dev->type);
ret = 0;
@@ -3203,7 +3272,7 @@
case SIOCGIFHWADDR:
/* Get hw address */
memcpy(ifr.ifr_hwaddr.sa_data, tun->dev->dev_addr, ETH_ALEN);
- ifr.ifr_hwaddr.sa_family = tun->dev->type;
+ dev_get_mac_address(&ifr.ifr_hwaddr, net, tun->dev->name);
if (copy_to_user(argp, &ifr, ifreq_len))
ret = -EFAULT;
break;
@@ -3213,7 +3282,7 @@
tun_debug(KERN_DEBUG, tun, "set hw address: %pM\n",
ifr.ifr_hwaddr.sa_data);
- ret = dev_set_mac_address(tun->dev, &ifr.ifr_hwaddr, NULL);
+ ret = dev_set_mac_address_user(tun->dev, &ifr.ifr_hwaddr, NULL);
break;
case TUNGETSNDBUF: