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https://github.com/torvalds/linux
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17b22e7a38
Add proper error handling for the case when platform_device_alloc() returns NULL due to memory allocation failure. This prevents a potential NULL pointer dereference when trying to use the pdev pointer without checking if allocation succeeded. [ bp: Massage commit message. ] Signed-off-by: Li Jun <lijun01@kylinos.cn> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://patch.msgid.link/20260602100711.2542568-1-lijun01@kylinos.cn
40 lines
828 B
C
40 lines
828 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2015, Christoph Hellwig.
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* Copyright (c) 2015, Intel Corporation.
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*/
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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static int found(struct resource *res, void *data)
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{
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return 1;
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}
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static __init int register_e820_pmem(void)
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{
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struct platform_device *pdev;
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int rc;
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rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
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IORESOURCE_MEM, 0, -1, NULL, found);
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if (rc <= 0)
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return 0;
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/*
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* See drivers/nvdimm/e820.c for the implementation, this is
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* simply here to trigger the module to load on demand.
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*/
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pdev = platform_device_alloc("e820_pmem", -1);
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if (!pdev)
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return -ENOMEM;
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rc = platform_device_add(pdev);
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if (rc)
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platform_device_put(pdev);
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return rc;
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}
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device_initcall(register_e820_pmem);
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