From d64f6d4a0959af116cdd57fc1ab947f6c2336acf Mon Sep 17 00:00:00 2001 From: Hui Wang Date: Tue, 8 Apr 2025 11:25:15 +0800 Subject: [PATCH] dmaengine: imx-sdma: Fix a possible memory leak in sdma_transfer_init stable inclusion from stable-v4.19.272 commit 80ee99e52936b2c04cc37b17a14b2ae2f9d282ac category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBWVWT CVE: CVE-2022-49746 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=80ee99e52936b2c04cc37b17a14b2ae2f9d282ac -------------------------------- [ Upstream commit 1417f59ac0b02130ee56c0c50794b9b257be3d17 ] If the function sdma_load_context() fails, the sdma_desc will be freed, but the allocated desc->bd is forgot to be freed. We already met the sdma_load_context() failure case and the log as below: [ 450.699064] imx-sdma 30bd0000.dma-controller: Timeout waiting for CH0 ready ... In this case, the desc->bd will not be freed without this change. Signed-off-by: Hui Wang Reviewed-by: Sascha Hauer Link: https://lore.kernel.org/r/20221130090800.102035-1-hui.wang@canonical.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin Signed-off-by: Tirui Yin Reviewed-by: Weilong Chen --- drivers/dma/imx-sdma.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index 3f5a01cb4ab4..b9e6d276df4c 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -1353,10 +1353,12 @@ static struct sdma_desc *sdma_transfer_init(struct sdma_channel *sdmac, sdma_config_ownership(sdmac, false, true, false); if (sdma_load_context(sdmac)) - goto err_desc_out; + goto err_bd_out; return desc; +err_bd_out: + sdma_free_bd(desc); err_desc_out: kfree(desc); err_out: -- Gitee