armbian/linux-rockchip
0
0
Fork 0
mirror of https://github.com/armbian/linux-rockchip.git synced 2026-01-06 11:08:10 -08:00
Code Issues Packages Projects Releases Wiki Activity

dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list

Browse Source 
[ 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: 16e19e1122 ("dmaengine: idxd: Fix list corruption in description completion")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/20240603012444.11902-1-lirongqing@baidu.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Li RongQing
2024-06-03 09:24:44 +08:00
committed by Greg Kroah-Hartman
parent 1bd1857fed
commit 83163667d8
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/dma/idxd/irq.c
View File

@@ -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;