From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Alan Stern <stern@rowland.harvard.edu>,
Johan Hovold <johan@kernel.org>
Subject: [PATCH 4.4 14/30] USB: hub: fix SS max number of ports
Date: Mon, 19 Jun 2017 23:20:48 +0800 [thread overview]
Message-ID: <20170619152033.991550457@linuxfoundation.org> (raw)
In-Reply-To: <20170619152033.211450261@linuxfoundation.org>
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <johan@kernel.org>
commit 93491ced3c87c94b12220dbac0527e1356702179 upstream.
Add define for the maximum number of ports on a SuperSpeed hub as per
USB 3.1 spec Table 10-5, and use it when verifying the retrieved hub
descriptor.
This specifically avoids benign attempts to update the DeviceRemovable
mask for non-existing ports (should we get that far).
Fixes: dbe79bbe9dcb ("USB 3.0 Hub Changes")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/core/hub.c | 8 +++++++-
include/uapi/linux/usb/ch11.h | 3 +++
2 files changed, 10 insertions(+), 1 deletion(-)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1318,7 +1318,13 @@ static int hub_configure(struct usb_hub
if (ret < 0) {
message = "can't read hub descriptor";
goto fail;
- } else if (hub->descriptor->bNbrPorts > USB_MAXCHILDREN) {
+ }
+
+ maxchild = USB_MAXCHILDREN;
+ if (hub_is_superspeed(hdev))
+ maxchild = min_t(unsigned, maxchild, USB_SS_MAXPORTS);
+
+ if (hub->descriptor->bNbrPorts > maxchild) {
message = "hub has too many ports!";
ret = -ENODEV;
goto fail;
--- a/include/uapi/linux/usb/ch11.h
+++ b/include/uapi/linux/usb/ch11.h
@@ -22,6 +22,9 @@
*/
#define USB_MAXCHILDREN 31
+/* See USB 3.1 spec Table 10-5 */
+#define USB_SS_MAXPORTS 15
+
/*
* Hub request types
*/
next prev parent reply other threads:[~2017-06-19 15:31 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-19 15:20 [PATCH 4.4 00/30] 4.4.74-stable review Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 01/30] configfs: Fix race between create_link and configfs_rmdir Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 02/30] can: gs_usb: fix memory leak in gs_cmd_reset() Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 04/30] [media] vb2: Fix an off by one error in vb2_plane_vaddr Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 05/30] mac80211: dont look at the PM bit of BAR frames Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 06/30] mac80211/wpa: use constant time memory comparison for MACs Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 08/30] mac80211: fix IBSS presp allocation size Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 10/30] x86/mm/32: Set the __vmalloc_start_set flag in initmem_init() Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 11/30] mfd: omap-usb-tll: Fix inverted bit use for USB TLL mode Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 12/30] staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data() Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 13/30] iio: proximity: as3935: recalibrate RCO after resume Greg Kroah-Hartman
2017-06-19 15:20 ` Greg Kroah-Hartman [this message]
2017-06-19 15:20 ` [PATCH 4.4 15/30] usb: core: fix potential memory leak in error path during hcd creation Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 16/30] [media] pvrusb2: reduce stack usage pvr2_eeprom_analyze() Greg Kroah-Hartman
2017-06-29 16:15 ` Ben Hutchings
2017-07-03 7:31 ` Greg Kroah-Hartman
2017-07-03 7:47 ` Arnd Bergmann
2017-07-03 13:37 ` Ben Hutchings
2017-07-03 14:39 ` Arnd Bergmann
2017-06-19 15:20 ` [PATCH 4.4 17/30] USB: gadget: dummy_hcd: fix hub-descriptor removable fields Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 18/30] usb: r8a66597-hcd: select a different endpoint on timeout Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 19/30] usb: r8a66597-hcd: decrease timeout Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 20/30] drivers/misc/c2port/c2port-duramar2150.c: checking for NULL instead of IS_ERR() Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 21/30] usb: xhci: ASMedia ASM1042A chipset need shorts TX quirk Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 22/30] USB: gadgetfs, dummy-hcd, net2280: fix locking for callbacks Greg Kroah-Hartman
2017-06-29 16:57 ` Ben Hutchings
2017-06-29 18:10 ` Alan Stern
2017-06-19 15:20 ` [PATCH 4.4 23/30] mm/memory-failure.c: use compound_head() flags for huge pages Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 24/30] swap: cond_resched in swap_cgroup_prepare() Greg Kroah-Hartman
2017-06-29 17:23 ` Ben Hutchings
2017-07-03 7:29 ` Greg Kroah-Hartman
2017-06-19 15:20 ` [PATCH 4.4 25/30] genirq: Release resources in __setup_irq() error path Greg Kroah-Hartman
2017-06-19 15:21 ` [PATCH 4.4 26/30] alarmtimer: Prevent overflow of relative timers Greg Kroah-Hartman
2017-06-19 15:21 ` [PATCH 4.4 27/30] usb: dwc3: exynos fix axius clock error path to do cleanup Greg Kroah-Hartman
2017-06-19 15:21 ` [PATCH 4.4 28/30] MIPS: Fix bnezc/jialc return address calculation Greg Kroah-Hartman
2017-06-19 15:21 ` [PATCH 4.4 29/30] alarmtimer: Rate limit periodic intervals Greg Kroah-Hartman
2017-06-19 15:21 ` [PATCH 4.4 30/30] mm: larger stack guard gap, between vmas Greg Kroah-Hartman
2017-06-21 5:41 ` Hugh Dickins
2017-06-24 15:00 ` Greg Kroah-Hartman
2017-06-20 0:11 ` [PATCH 4.4 00/30] 4.4.74-stable review Guenter Roeck
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