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Filename Latest commit message Latest commit date
Lianqin Hu f5f33fb57a usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null 
commit 13014969cbf07f18d62ceea40bd8ca8ec9d36cec upstream.

Considering that in some extreme cases, when performing the
unbinding operation, gserial_disconnect has cleared gser->ioport,
which triggers gadget reconfiguration, and then calls gs_read_complete,
resulting in access to a null pointer. Therefore, ep is disabled before
gserial_disconnect sets port to null to prevent this from happening.

Call trace:
 gs_read_complete+0x58/0x240
 usb_gadget_giveback_request+0x40/0x160
 dwc3_remove_requests+0x170/0x484
 dwc3_ep0_out_start+0xb0/0x1d4
 __dwc3_gadget_start+0x25c/0x720
 kretprobe_trampoline.cfi_jt+0x0/0x8
 kretprobe_trampoline.cfi_jt+0x0/0x8
 udc_bind_to_driver+0x1d8/0x300
 usb_gadget_probe_driver+0xa8/0x1dc
 gadget_dev_desc_UDC_store+0x13c/0x188
 configfs_write_iter+0x160/0x1f4
 vfs_write+0x2d0/0x40c
 ksys_write+0x7c/0xf0
 __arm64_sys_write+0x20/0x30
 invoke_syscall+0x60/0x150
 el0_svc_common+0x8c/0xf8
 do_el0_svc+0x28/0xa0
 el0_svc+0x24/0x84

Fixes: c1dca562be ("usb gadget: split out serial core")
Cc: stable <stable@kernel.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lianqin Hu <hulianqin@vivo.com>
Link: https://lore.kernel.org/r/TYUPR06MB621733B5AC690DBDF80A0DCCD2042@TYUPR06MB6217.apcprd06.prod.outlook.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-02-01 18:18:47 +01:00
arch ARC: build: Try to guess GCC variant of cross compiler 2025-01-09 13:23:36 +01:00
block blk-iocost: Avoid using clamp() on inuse in __propagate_weights() 2024-12-19 18:05:04 +01:00
certs
crypto
Documentation PCI: Add 'reset_subordinate' to reset hierarchy below bridge 2024-12-14 19:44:54 +01:00
drivers usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null 2025-02-01 18:18:47 +01:00
fs jbd2: flush filesystem device before updating tail sequence 2025-02-01 18:18:44 +01:00
include tcp/dccp: allow a connection when sk_max_ack_backlog is zero 2025-02-01 18:18:45 +01:00
init
ipc
kernel ftrace: use preempt_enable/disable notrace macros to avoid double fault 2025-01-09 13:23:37 +01:00
lib
LICENSES
mm mm: vmscan: account for free pages to prevent infinite Loop in throttle_direct_reclaim() 2025-01-09 13:23:37 +01:00
net sctp: sysctl: auth_enable: avoid using current->nsproxy 2025-02-01 18:18:45 +01:00
samples samples/bpf: Fix a resource leak 2024-12-14 19:44:50 +01:00
scripts modpost: fix the missed iteration for the max bit in do_input() 2025-01-09 13:23:36 +01:00
security selinux: ignore unknown extended permissions 2025-01-09 13:23:33 +01:00
sound sound: usb: format: don't warn that raw DSD is unsupported 2025-01-09 13:23:36 +01:00
tools
usr
virt KVM: arm64: Ignore PMCNTENSET_EL0 while checking for overflow status 2024-12-19 18:05:04 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
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Kbuild
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MAINTAINERS
Makefile Linux 5.4.289 2025-01-09 13:23:37 +01:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.