linux-kernel - [PATCH] dmaengine: xilinx: xdma: Fix IS_ERR() vs NULL bug in xdma

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240819193641.600176-1-harshit.m.mogalapalli@oracle.com>
Date: Mon, 19 Aug 2024 12:36:40 -0700
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Lizhi Hou <lizhi.hou@....com>, Brian Xu <brian.xu@....com>,
        Raj Kumar Rampelli <raj.kumar.rampelli@....com>,
        Vinod Koul <vkoul@...nel.org>, Michal Simek <michal.simek@....com>,
        Sonal Santan <sonal.santan@....com>, Max Zhen <max.zhen@....com>,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc: dan.carpenter@...aro.org, kernel-janitors@...r.kernel.org,
        error27@...il.com, harshit.m.mogalapalli@...cle.com
Subject: [PATCH] dmaengine: xilinx: xdma: Fix IS_ERR() vs NULL bug in xdma_probe()

devm_regmap_init_mmio() returns error pointers on error, it doesn't
return NULL. Update the error check.

Fixes: 17ce252266c7 ("dmaengine: xilinx: xdma: Add xilinx xdma driver")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
This is based on static analysis with smatch, only compile tested.
---
 drivers/dma/xilinx/xdma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/xdma.c b/drivers/dma/xilinx/xdma.c
index 718842fdaf98..44fae351f0a0 100644
--- a/drivers/dma/xilinx/xdma.c
+++ b/drivers/dma/xilinx/xdma.c
@@ -1240,7 +1240,8 @@ static int xdma_probe(struct platform_device *pdev)
 
 	xdev->rmap = devm_regmap_init_mmio(&pdev->dev, reg_base,
 					   &xdma_regmap_config);
-	if (!xdev->rmap) {
+	if (IS_ERR(xdev->rmap)) {
+		ret = PTR_ERR(xdev->rmap);
 		xdma_err(xdev, "config regmap failed: %d", ret);
 		goto failed;
 	}
-- 
2.39.3