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| author | Chenyuan Yang <chenyuan0y@gmail.com> | 2025-04-17 22:50:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-25 14:21:16 +0300 |
| commit | 73fb0ec9436ae87bcae067ce35d6cdd72bade86c (patch) | |
| tree | 575ca100c4b72e7304b34c7161489331bd076070 /scripts/generate_rust_analyzer.py | |
| parent | af076a41f8a28faf9ceb9dd2d88aef2c202ef39a (diff) | |
| download | linux-73fb0ec9436ae87bcae067ce35d6cdd72bade86c.tar.xz | |
usb: acpi: Prevent null pointer dereference in usb_acpi_add_usb4_devlink()
As demonstrated by the fix for update_port_device_state,
commit 12783c0b9e2c ("usb: core: Prevent null pointer dereference in update_port_device_state"),
usb_hub_to_struct_hub() can return NULL in certain scenarios,
such as during hub driver unbind or teardown race conditions,
even if the underlying usb_device structure exists.
Plus, all other places that call usb_hub_to_struct_hub() in the same file
do check for NULL return values.
If usb_hub_to_struct_hub() returns NULL, the subsequent access to
hub->ports[udev->portnum - 1] will cause a null pointer dereference.
Signed-off-by: Chenyuan Yang <chenyuan0y@gmail.com>
Fixes: f1bfb4a6fed6 ("usb: acpi: add device link between tunneled USB3 device and USB4 Host Interface")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20250417195032.1811338-1-chenyuan0y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions