commit 8bbceba7dc5090c00105e006ce28d1292cfda8dd
author Abin Joseph <abin.joseph@amd.com> Wed Sep 03 08:22:13 2025 +0530
committer Jakub Kicinski <kuba@kernel.org> Thu Sep 04 07:13:08 2025 -0700
tree b487e73efcef3ac5ac90bda5687788fc6939ee46
parent d93b10e89471002d16556f14b804b5a7d9924142

net: xilinx: axienet: Add error handling for RX metadata pointer retrieval

Add proper error checking for dmaengine_desc_get_metadata_ptr() which
can return an error pointer and lead to potential crashes or undefined
behaviour if the pointer retrieval fails.

Properly handle the error by unmapping DMA buffer, freeing the skb and
returning early to prevent further processing with invalid data.

Fixes: 6a91b846af85 ("net: axienet: Introduce dmaengine support")
Signed-off-by: Abin Joseph <abin.joseph@amd.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Link: https://patch.msgid.link/20250903025213.3120181-1-abin.joseph@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>