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

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[ Upstream commit e3215deca4 ]

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>

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Li RongQing 2024-06-03 09:24:44 +08:00 • committed by Greg Kroah-Hartman

parent 1cfcb0cf25

commit 1b08bf5a17

1 changed files with 3 additions and 1 deletions

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drivers/dma/idxd/irq.c

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