From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Matti Vuorela <matti.vuorela@bitfactor.fi>,
Yves-Alexis Perez <corsac@corsac.net>,
Jakub Kicinski <kuba@kernel.org>
Subject: [PATCH 5.4 10/39] usbnet: ipheth: fix connectivity with iOS 14
Date: Sun, 6 Dec 2020 12:17:14 +0100 [thread overview]
Message-ID: <20201206111555.179493405@linuxfoundation.org> (raw)
In-Reply-To: <20201206111554.677764505@linuxfoundation.org>
From: Yves-Alexis Perez <corsac@corsac.net>
[ Upstream commit f33d9e2b48a34e1558b67a473a1fc1d6e793f93c ]
Starting with iOS 14 released in September 2020, connectivity using the
personal hotspot USB tethering function of iOS devices is broken.
Communication between the host and the device (for example ICMP traffic
or DNS resolution using the DNS service running in the device itself)
works fine, but communication to endpoints further away doesn't work.
Investigation on the matter shows that no UDP and ICMP traffic from the
tethered host is reaching the Internet at all. For TCP traffic there are
exchanges between tethered host and server but packets are modified in
transit leading to impossible communication.
After some trials Matti Vuorela discovered that reducing the URB buffer
size by two bytes restored the previous behavior. While a better
solution might exist to fix the issue, since the protocol is not
publicly documented and considering the small size of the fix, let's do
that.
Tested-by: Matti Vuorela <matti.vuorela@bitfactor.fi>
Signed-off-by: Yves-Alexis Perez <corsac@corsac.net>
Link: https://lore.kernel.org/linux-usb/CAAn0qaXmysJ9vx3ZEMkViv_B19ju-_ExN8Yn_uSefxpjS6g4Lw@mail.gmail.com/
Link: https://github.com/libimobiledevice/libimobiledevice/issues/1038
Link: https://lore.kernel.org/r/20201119172439.94988-1-corsac@corsac.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/usb/ipheth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/usb/ipheth.c
+++ b/drivers/net/usb/ipheth.c
@@ -59,7 +59,7 @@
#define IPHETH_USBINTF_SUBCLASS 253
#define IPHETH_USBINTF_PROTO 1
-#define IPHETH_BUF_SIZE 1516
+#define IPHETH_BUF_SIZE 1514
#define IPHETH_IP_ALIGN 2 /* padding at front of URB */
#define IPHETH_TX_TIMEOUT (5 * HZ)
next prev parent reply other threads:[~2020-12-06 11:41 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-06 11:17 [PATCH 5.4 00/39] 5.4.82-rc1 review Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 01/39] devlink: Hold rtnl lock while reading netdev attributes Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 02/39] ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 03/39] net/af_iucv: set correct sk_protocol for child sockets Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 04/39] net/tls: missing received data after fast remote close Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 05/39] net/tls: Protect from calling tls_dev_del for TLS RX twice Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 06/39] rose: Fix Null pointer dereference in rose_send_frame() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 07/39] sock: set sk_err to ee_errno on dequeue from errq Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 08/39] tcp: Set INET_ECN_xmit configuration in tcp_reinit_congestion_control Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 09/39] tun: honor IOCB_NOWAIT flag Greg Kroah-Hartman
2020-12-06 11:17 ` Greg Kroah-Hartman [this message]
2020-12-06 11:17 ` [PATCH 5.4 11/39] bonding: wait for sysfs kobject destruction before freeing struct slave Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 12/39] staging/octeon: fix up merge error Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 13/39] ima: extend boot_aggregate with kernel measurements Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 14/39] sched/fair: Fix unthrottle_cfs_rq() for leaf_cfs_rq list Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 15/39] netfilter: bridge: reset skb->pkt_type after NF_INET_POST_ROUTING traversal Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 16/39] ipv4: Fix tos mask in inet_rtm_getroute() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 17/39] dt-bindings: net: correct interrupt flags in examples Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 18/39] chelsio/chtls: fix panic during unload reload chtls Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 19/39] ibmvnic: Ensure that SCRQ entry reads are correctly ordered Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 20/39] ibmvnic: Fix TX completion error handling Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 21/39] inet_ecn: Fix endianness of checksum update when setting ECT(1) Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 22/39] geneve: pull IP header before ECN decapsulation Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 23/39] net: ip6_gre: set dev->hard_header_len when using header_ops Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 24/39] net/x25: prevent a couple of overflows Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 25/39] cxgb3: fix error return code in t3_sge_alloc_qset() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 26/39] net: pasemi: fix error return code in pasemi_mac_open() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 27/39] vxlan: fix error return code in __vxlan_dev_create() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 28/39] chelsio/chtls: fix a double free in chtls_setkey() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 29/39] net: mvpp2: Fix error return code in mvpp2_open() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 30/39] net: skbuff: ensure LSE is pullable before decrementing the MPLS ttl Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 31/39] net: openvswitch: ensure LSE is pullable before reading it Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 32/39] net/sched: act_mpls: " Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 33/39] net/mlx5: DR, Proper handling of unsupported Connect-X6DX SW steering Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 34/39] net/mlx5: Fix wrong address reclaim when command interface is down Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 35/39] ALSA: usb-audio: US16x08: fix value count for level meters Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 36/39] Input: xpad - support Ardwiino Controllers Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 37/39] Input: i8042 - add ByteSpeed touchpad to noloop table Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 38/39] tracing: Remove WARN_ON in start_thread() Greg Kroah-Hartman
2020-12-06 11:17 ` [PATCH 5.4 39/39] RDMA/i40iw: Address an mmap handler exploit in i40iw Greg Kroah-Hartman
2020-12-07 8:03 ` [PATCH 5.4 00/39] 5.4.82-rc1 review Naresh Kamboju
2020-12-07 15:04 ` Jon Hunter
2020-12-07 15:55 ` Guenter Roeck
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201206111555.179493405@linuxfoundation.org \
--to=gregkh@linuxfoundation.org \
--cc=corsac@corsac.net \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=matti.vuorela@bitfactor.fi \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.