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dmaengine: idxd: Fix possible invalid memory access after FLR

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In the case that the first Function Level Reset (FLR) concludes
correctly, but in the second FLR the scratch area for the saved
configuration cannot be allocated, it's possible for a invalid memory
access to happen.

Always set the deallocated scratch area to NULL after FLR completes.

Fixes: 98d187a989 ("dmaengine: idxd: Enable Function Level Reset (FLR) for halt")
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-3-7ed70658a9d1@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Vinicius Costa Gomes
2026-01-21 10:34:29 -08:00
committed by Vinod Koul
parent 52d2edea0d
commit d6077df7b7
1 changed files with 1 additions and 0 deletions
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1
drivers/dma/idxd/init.c
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@@ -1146,6 +1146,7 @@ static void idxd_reset_done(struct pci_dev *pdev)
}
out:
kfree(idxd->idxd_saved);
idxd->idxd_saved = NULL;
}
static const struct pci_error_handlers idxd_error_handler = {