6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Li RongQing <lirongqing@xxxxxxxxx>
[ Upstream commit e3215deca4520773cd2b155bed164c12365149a7 ]
Use list_for_each_entry_safe() to allow iterating through the list and
deleting the entry in the iteration process. The descriptor is freed via
idxd_desc_complete() and there's a slight chance may cause issue for
the list iterator when the descriptor is reused by another thread
without it being deleted from the list.
Fixes: 16e19e11228b ("dmaengine: idxd: Fix list corruption in description completion")
Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Reviewed-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240603012444.11902-1-lirongqing@xxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/dma/idxd/irq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index aa314ebec5878..4a3eb96b8199a 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -454,11 +454,13 @@ 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_dma_complete_txd(desc, IDXD_COMPLETE_ABORT, true);
continue;
--
2.43.0
