Harry Pan 16c4cb19fa usb: core: safely deal with the dynamic quirk lists ... Applying dynamic usbcore quirks in early booting when the slab is not yet ready would cause kernel panic of null pointer dereference because the quirk_count has been counted as 1 while the quirk_list was failed to allocate. i.e., [ 1.044970] BUG: unable to handle kernel NULL pointer dereference at (null) [ 1.044995] IP: [<ffffffffb0953ec7>] usb_detect_quirks+0x88/0xd1 [ 1.045016] PGD 0 [ 1.045026] Oops: 0000 [#1] PREEMPT SMP [ 1.046986] gsmi: Log Shutdown Reason 0x03 [ 1.046995] Modules linked in: [ 1.047008] CPU: 0 PID: 81 Comm: kworker/0:3 Not tainted 4.4.154 #28 [ 1.047016] Hardware name: Google Coral/Coral, BIOS Google_Coral.10068.27.0 12/04/2017 [ 1.047028] Workqueue: usb_hub_wq hub_event [ 1.047037] task: ffff88017a321c80 task.stack: ffff88017a384000 [ 1.047044] RIP: 0010:[<ffffffffb0953ec7>] [<ffffffffb0953ec7>] usb_detect_quirks+0x88/0xd1 To tackle this odd, let's balance the quirk_count to 0 when the kcalloc call fails, and defer the quirk setting into a lower level callback which ensures that the kernel memory management has been initialized. Fixes: 027bd6cafd ("usb: core: Add "quirks" parameter for usbcore") Signed-off-by: Harry Pan <harry.pan@intel.com> Acked-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-20 13:20:24 +02:00
..
buffer.c
config.c	USB: Accept bulk endpoints with 1024-byte maxpacket	2018-05-03 10:16:38 -07:00
devices.c
devio.c	USB: usbdevfs: restore warning for nonsensical flags	2018-09-20 12:48:39 +02:00
driver.c	USB: fix error handling in usb_driver_claim_interface()	2018-09-20 12:49:12 +02:00
endpoint.c
file.c
generic.c	USB:fix USB3 devices behind USB3 hubs not resuming at hibernate thaw	2018-03-23 14:11:54 +01:00
hcd-pci.c	usb: Don't die twice if PCI xhci host is not responding in resume	2018-09-05 14:36:53 +02:00
hcd.c	Merge 4.17-rc3 into usb-next	2018-04-30 04:58:51 -07:00
hub.c	Merge 4.18-rc7 into usb-next	2018-07-30 10:04:58 +02:00
hub.h	usb: hub: Per-port setting to use old enumeration scheme	2018-05-31 12:48:17 +02:00
Kconfig
ledtrig-usbport.c	usb: simplify usbport trigger	2018-07-05 23:21:15 +02:00
Makefile
message.c	usb: Avoid use-after-free by flushing endpoints early in usb_set_interface()	2018-09-05 14:36:53 +02:00
notify.c
of.c	usb: Change usb_of_get_companion_dev() place to usb/common	2018-09-10 20:40:29 +02:00
otg_whitelist.h
phy.c	usb: core: phy: make it a no-op if CONFIG_GENERIC_PHY is disabled	2018-04-22 15:01:30 +02:00
phy.h	usb: core: phy: add the SPDX-License-Identifier and include guard	2018-04-23 09:41:32 +02:00
port.c	usb: hub: Per-port setting to use old enumeration scheme	2018-05-31 12:48:17 +02:00
quirks.c	usb: core: safely deal with the dynamic quirk lists	2018-09-20 13:20:24 +02:00
sysfs.c	USB: USB 3.2 Add sysfs entries for a usb device rx_lanes and tx_lanes	2018-04-22 16:19:26 +02:00
urb.c
usb-acpi.c
usb.c	USB: handle NULL config in usb_find_alt_setting()	2018-09-20 12:49:12 +02:00
usb.h	usb: core: Add "quirks" parameter for usbcore	2018-03-20 10:16:09 +01:00