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 4.4 03/39] usbnet: ipheth: fix connectivity with iOS 14
Date: Thu, 10 Dec 2020 15:26:14 +0100 [thread overview]
Message-ID: <20201210142601.063588939@linuxfoundation.org> (raw)
In-Reply-To: <20201210142600.887734129@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
@@ -70,7 +70,7 @@
#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:[~2020-12-10 14:29 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-10 14:26 [PATCH 4.4 00/39] 4.4.248-rc1 review Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 01/39] net/af_iucv: set correct sk_protocol for child sockets Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 02/39] rose: Fix Null pointer dereference in rose_send_frame() Greg Kroah-Hartman
2020-12-10 14:26 ` Greg Kroah-Hartman [this message]
2020-12-10 14:26 ` [PATCH 4.4 04/39] bonding: wait for sysfs kobject destruction before freeing struct slave Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 05/39] netfilter: bridge: reset skb->pkt_type after NF_INET_POST_ROUTING traversal Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 06/39] net/x25: prevent a couple of overflows Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 07/39] cxgb3: fix error return code in t3_sge_alloc_qset() Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 08/39] net: pasemi: fix error return code in pasemi_mac_open() Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 09/39] dt-bindings: net: correct interrupt flags in examples Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 10/39] Input: xpad - support Ardwiino Controllers Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 11/39] Input: i8042 - add ByteSpeed touchpad to noloop table Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 12/39] powerpc: Stop exporting __clear_user which is now inlined Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 13/39] btrfs: sysfs: init devices outside of the chunk_mutex Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 14/39] vlan: consolidate VLAN parsing code and limit max parsing depth Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 15/39] geneve: pull IP header before ECN decapsulation Greg Kroah-Hartman
2020-12-10 14:32 ` Eric Dumazet
2020-12-10 14:38 ` Greg Kroah-Hartman
2020-12-10 14:40 ` Greg Kroah-Hartman
2020-12-10 14:53 ` Eric Dumazet
2020-12-10 15:36 ` Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 16/39] usb: gadget: f_fs: Use local copy of descriptors for userspace copy Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 17/39] USB: serial: kl5kusb105: fix memleak on open Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 18/39] USB: serial: ch341: add new Product ID for CH341A Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 19/39] USB: serial: ch341: sort device-id entries Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 20/39] USB: serial: option: add Fibocom NL668 variants Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 21/39] USB: serial: option: add support for Thales Cinterion EXS82 Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 22/39] tty: Fix ->pgrp locking in tiocspgrp() Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 23/39] ALSA: hda/realtek - Add new codec supported for ALC897 Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 24/39] ALSA: hda/generic: Add option to enforce preferred_dacs pairs Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 25/39] tty: Fix ->session locking Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 26/39] cifs: fix potential use-after-free in cifs_echo_request() Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 27/39] i2c: imx: Fix reset of I2SR_IAL flag Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 28/39] i2c: imx: Check for I2SR_IAL after every byte Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 29/39] arm64: assembler: make adr_l work in modules under KASLR Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 30/39] iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 31/39] spi: Introduce device-managed SPI controller allocation Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 32/39] spi: bcm2835: Fix use-after-free on unbind Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 33/39] spi: bcm2835: Release the DMA channel if probe fails after dma_init Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 34/39] tracing: Fix userstacktrace option for instances Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 35/39] btrfs: cleanup cow block on error Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 36/39] mm/userfaultfd: do not access vma->vm_mm after calling handle_userfault() Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 37/39] gfs2: check for empty rgrp tree in gfs2_ri_update Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 38/39] Input: i8042 - fix error return code in i8042_setup_aux() Greg Kroah-Hartman
2020-12-10 14:26 ` [PATCH 4.4 39/39] x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes Greg Kroah-Hartman
2020-12-10 20:37 ` [PATCH 4.4 00/39] 4.4.248-rc1 review Pavel Machek
2020-12-10 21:24 ` Shuah Khan
2020-12-11 0:05 ` Guenter Roeck
2020-12-11 12:06 ` Naresh Kamboju
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