From: Vernon Yang <yanglincheng@kylinos.cn>
Date: Thu, 4 Sep 2025 18:25:27 +0000 (+0800)
Subject: PCI/AER: Fix NULL pointer access by aer_info
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=0a27bdb14b028fed30a10cec2f945c38cb5ca4fa;p=users%2Fhch%2Fmisc.git

PCI/AER: Fix NULL pointer access by aer_info

The kzalloc(GFP_KERNEL) may return NULL, so all accesses to aer_info->xxx
will result in kernel panic. Fix it.

Signed-off-by: Vernon Yang <yanglincheng@kylinos.cn>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250904182527.67371-1-vernon2gm@gmail.com
---

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 62c74b5f99ae..cd0f0b17f097 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -393,6 +393,10 @@ void pci_aer_init(struct pci_dev *dev)
 		return;
 
 	dev->aer_info = kzalloc(sizeof(*dev->aer_info), GFP_KERNEL);
+	if (!dev->aer_info) {
+		dev->aer_cap = 0;
+		return;
+	}
 
 	ratelimit_state_init(&dev->aer_info->correctable_ratelimit,
 			     DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST);