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Date: Fri, 14 Sep 2012 17:48:42 -0700 From: Yinghai Lu <yinghai@...nel.org> To: Bjorn Helgaas <bhelgaas@...gle.com> Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>, x86@...nel.org Subject: [PATCH] PCI, x86: clear initial value for root info resources Found one system one root bus hot remove get panic. Panic happens when try to release hostbridge resource. It turns out that resource get reject during put into resource tree because of conflicts. Also that resource parent pointer have random value. That invalid value cause it pass through check __release_pci_root_info and panic in release_resource. Try to use kzalloc instead. Signed-off-by: Yinghai Lu <yinghai@...nel.org> Cc: x86@...nel.org --- arch/x86/pci/acpi.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) Index: linux-2.6/arch/x86/pci/acpi.c =================================================================== --- linux-2.6.orig/arch/x86/pci/acpi.c +++ linux-2.6/arch/x86/pci/acpi.c @@ -305,7 +305,6 @@ setup_resource(struct acpi_resource *acp res->flags = flags; res->start = start; res->end = end; - res->child = NULL; if (!pci_use_crs) { dev_printk(KERN_DEBUG, &info->bridge->dev, @@ -434,7 +433,7 @@ probe_pci_root_info(struct pci_root_info size = sizeof(*info->res) * info->res_num; info->res_num = 0; - info->res = kmalloc(size, GFP_KERNEL); + info->res = kzalloc(size, GFP_KERNEL); if (!info->res) return; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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