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[LTS 9.4] dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list #422

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[LTS 9.4] dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list #422

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4 changes: 3 additions & 1 deletion drivers/dma/idxd/irq.c
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Original file line number Diff line number Diff line change
Expand Up @@ -611,11 +611,13 @@ static void irq_process_work_list(struct idxd_irq_entry *irq_entry)

spin_unlock(&irq_entry->list_lock);

list_for_each_entry(desc, &flist, list) {
list_for_each_entry_safe(desc, n, &flist, list) {
/*
* Check against the original status as ABORT is software defined
* and 0xff, which DSA_COMP_STATUS_MASK can mask out.
*/
list_del(&desc->list);

if (unlikely(desc->completion->status == IDXD_COMP_DESC_ABORT)) {
idxd_desc_complete(desc, IDXD_COMPLETE_ABORT, true);
continue;
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