In the Linux kernel, the following vulnerability has been resolved: dmaengine: at_hdmac: fix device leak on of_dma_xlate() Make sure to drop the reference taken when looking up the DMA platform device during of_dma_xlate() when releasing channel resources. Note that commit 3832b78b3ec2 ("dmaengine: at_hdmac: add missing put_device() call in at_dma_xlate()") fixed the leak in a couple of error paths but the reference is still leaking on successful allocation.
https://git.kernel.org/stable/c/f3c23b7e941349505c3d40de2cc0acd93d9ac057
https://git.kernel.org/stable/c/b9074b2d7a230b6e28caa23165e9d8bc0677d333
https://git.kernel.org/stable/c/987c71671367f42460689b78244d7b894c50999a
https://git.kernel.org/stable/c/6a86cf2c09e149d5718a5b7090545f7566da9334