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mtd: virt-concat: unlink concat node before freeing it

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mtd_virt_concat_create_item() links each new mtd_virt_concat_node to
concat_node_list. mtd_virt_concat_destroy() later frees the node after
destroying its concatenated MTD device, but fails to unlink it. A later
list traversal dereferences the freed node, causing a use-after-free.

Remove the node from concat_node_list before freeing it.

Fixes: 43db6366fc ("mtd: Add driver for concatenating devices")
Cc: stable@vger.kernel.org
Assisted-by: Codex:gpt-5.6, smatch
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Harshit Mogalapalli 2026-09-25 05:55:44 -07:00 committed by Miquel Raynal
parent 2e566a6830
commit 532caaa2f4
1 changed files with 1 additions and 0 deletions
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drivers/mtd/mtd_virt_concat.c
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@ -130,6 +130,7 @@ int mtd_virt_concat_destroy(struct mtd_info *mtd)
mtd_concat_destroy(&concat->mtd);
}
list_del(&item->head);
for (idx = 0; idx < item->count; idx++)
of_node_put(item->nodes[idx]);