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| author | Xie Yuanbin <xieyuanbin1@huawei.com> | 2026-07-28 03:16:42 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2026-08-05 16:15:51 +0100 |
| commit | 1039bffd6ae9c75b42b7d148d6c1106134107b66 (patch) | |
| tree | e8ee4ac80f87e2ad1b6b0c877eccbb62b0915c02 /drivers/usb/Makefile | |
| download | linux-stable-1039bffd6ae9c75b42b7d148d6c1106134107b66.tar.gz linux-stable-1039bffd6ae9c75b42b7d148d6c1106134107b66.zip | |
ARM: 9485/1: mm: acquire mmap write lock around show_pte() for user faultsgrafted
When CONFIG_DEBUG_USER=y, and cmdline "user_debug=31" is set,
a user fault may trigger show_pte() without any lock.
If another thread in the same process concurrently calls munmap(),
the page table pages may be freed while show_pte() is still traversing
them, causing a use-after-free in show_pte().
If CONFIG_ARM_LPAE=y, this may cause a kernel panic if the pages table
of PMD are freed when show_pte() is running.
Acquire mmap_write_lock() around show_pte() for user faults to fix the
contention.
For user faults, additionally restrict that show_pte() is called only
when the addr is a user-space address (addr < TASK_SIZE). This is because
the lock of tsk->mm only protects the virtual memory of user address space,
furthermore, dumping the page tables of a kernel-space address for user
faults is unnecessary and may have security implications.
Keep everything unchanged for kernel faults, because the kernel is
already in the "oops" state, acquiring a lock may risk a deadlock.
Co-developed-by: Qi Xi <xiqi2@huawei.com>
Fixes: 6d021b724481 ("ARM: dump pgd, pmd and pte states on unhandled data abort faults")
Link: https://lore.kernel.org/20260716014022.2823-1-xieyuanbin1@huawei.com
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Qi Xi <xiqi2@huawei.com>
Signed-off-by: Xie Yuanbin <xieyuanbin1@huawei.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'drivers/usb/Makefile')
| -rw-r--r-- | drivers/usb/Makefile | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile new file mode 100644 index 000000000..eecbd631f --- /dev/null +++ b/drivers/usb/Makefile @@ -0,0 +1,67 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the kernel USB device drivers. +# + +# Object files in subdirectories + +obj-$(CONFIG_USB_COMMON) += common/ +obj-$(CONFIG_USB) += core/ +obj-$(CONFIG_USB_SUPPORT) += phy/ + +obj-$(CONFIG_USB_DWC3) += dwc3/ +obj-$(CONFIG_USB_DWC2) += dwc2/ +obj-$(CONFIG_USB_ISP1760) += isp1760/ + +obj-$(CONFIG_USB_CDNS_SUPPORT) += cdns3/ + +obj-$(CONFIG_USB_FOTG210) += fotg210/ + +obj-$(CONFIG_USB_MON) += mon/ +obj-$(CONFIG_USB_MTU3) += mtu3/ + +obj-$(CONFIG_USB_PCI) += host/ +obj-$(CONFIG_USB_EHCI_HCD) += host/ +obj-$(CONFIG_USB_ISP116X_HCD) += host/ +obj-$(CONFIG_USB_OHCI_HCD) += host/ +obj-$(CONFIG_USB_UHCI_HCD) += host/ +obj-$(CONFIG_USB_FHCI_HCD) += host/ +obj-$(CONFIG_USB_XHCI_HCD) += host/ +obj-$(CONFIG_USB_SL811_HCD) += host/ +obj-$(CONFIG_USB_R8A66597_HCD) += host/ +obj-$(CONFIG_USB_FSL_USB2) += host/ +obj-$(CONFIG_USB_FOTG210_HCD) += host/ +obj-$(CONFIG_USB_MAX3421_HCD) += host/ +obj-$(CONFIG_USB_XEN_HCD) += host/ + +obj-$(CONFIG_USB_C67X00_HCD) += c67x00/ + +obj-$(CONFIG_USB_ACM) += class/ +obj-$(CONFIG_USB_PRINTER) += class/ +obj-$(CONFIG_USB_WDM) += class/ +obj-$(CONFIG_USB_TMC) += class/ + +obj-$(CONFIG_USB_STORAGE) += storage/ +obj-$(CONFIG_USB) += storage/ + +obj-$(CONFIG_USB_MDC800) += image/ +obj-$(CONFIG_USB_MICROTEK) += image/ + +obj-$(CONFIG_USB_SERIAL) += serial/ + +obj-$(CONFIG_USB) += misc/ +obj-$(CONFIG_EARLY_PRINTK_USB) += early/ + +obj-$(CONFIG_USB_ATM) += atm/ +obj-$(CONFIG_USB_SPEEDTOUCH) += atm/ + +obj-$(CONFIG_USB_MUSB_HDRC) += musb/ +obj-$(CONFIG_USB_CHIPIDEA) += chipidea/ +obj-$(CONFIG_USB_RENESAS_USBHS) += renesas_usbhs/ +obj-$(CONFIG_USB_GADGET) += gadget/ + +obj-$(CONFIG_USBIP_CORE) += usbip/ + +obj-$(CONFIG_TYPEC) += typec/ + +obj-$(CONFIG_USB_ROLE_SWITCH) += roles/ |