[Bug] NULL Dereference occurs in Endpoint Halt when Interface is Unmapped#14
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hkpeprah wants to merge 1 commit intoweston-embedded:developfrom
Open
[Bug] NULL Dereference occurs in Endpoint Halt when Interface is Unmapped#14hkpeprah wants to merge 1 commit intoweston-embedded:developfrom
hkpeprah wants to merge 1 commit intoweston-embedded:developfrom
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When `USBD_IF_RefGet()` returns `NULL`, we still attempt to dereference it into `p_alt_if`, leading to a `NULL` pointer deference and crash. This scenario happens when there is a race between USB bus resets and endpoint requests, leading to the host sending ac ontrol request targeting an endpoint right as the device is resetting or reconfiguring.
Author
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@wes-jmagasrevy Would you be able to take a look at this? |
Member
Member
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Hello hkpeprah, |
Author
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We are using the Kinetis KXX driver: https://github.com/weston-embedded/uC-USBD/tree/develop/Drivers/Kinetis_Kxx. I'll attempt with one of the examples to reproduce. |
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[Bug] NULL Dereference occurs in Endpoint Halt when Interface is Unmapped
Overview
When
USBD_IF_RefGet()returnsNULL, we still attempt to dereference it intop_alt_if, leading to aNULLpointer deference and crash. This scenario happens when there is a race between USB bus resets and endpoint requests, leading to the host sending a control request targeting an endpoint right as the device is resetting or reconfiguring.