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x86/pmem: Check for platform_device_alloc() retval

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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
This commit is contained in:
Li Jun 2026-06-02 18:07:11 +08:00 committed by Borislav Petkov (AMD)
parent d022ff2557
commit 17b22e7a38
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/pmem.c
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@ -27,6 +27,8 @@ static __init int register_e820_pmem(void)
* simply here to trigger the module to load on demand.
*/
pdev = platform_device_alloc("e820_pmem", -1);
if (!pdev)
return -ENOMEM;
rc = platform_device_add(pdev);
if (rc)