In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Fix potential NULL pointer dereference in context cleanup

aiedestroycontext() is invoked during error handling in aie2createcontext(). However, aiedestroycontext() assumes that the context's mailbox channel pointer is non-NULL. If mailbox channel creation fails, the pointer remains NULL and calling aiedestroycontext() can lead to a NULL pointer dereference.

In aie2createcontext(), replace aiedestroycontext() with a function which request firmware to remove the context created previously.

In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Validate command buffer payload count

The count field in the command header is used to determine the valid payload size. Verify that the valid payload does not exceed the remaining buffer space.

In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Fix crash when destroying a suspended hardware context

If userspace issues an ioctl to destroy a hardware context that has already been automatically suspended, the driver may crash because the mailbox channel pointer is NULL for the suspended context.

Fix this by checking the mailbox channel pointer in aie2destroycontext() before accessing it.

In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Fix out-of-bounds memset in command slot handling

The remaining space in a command slot may be smaller than the size of the command header. Clearing the command header with memset() before verifying the available slot space can result in an out-of-bounds write and memory corruption.

Fix this by moving the memset() call after the size validation.