From: Sasha Levin sashal@kernel.org Sent: Saturday, June 22, 2019 11:14 AM To: Sasha Levin sashal@kernel.org; Dexuan Cui decui@microsoft.com; linux-pci@vger.kernel.org Cc: Lili Deng (Wicresoft North America Ltd) v-lide@microsoft.com; stable@vger.kernel.org; stable@vger.kernel.org Subject: Re: [PATCH] PCI: hv: Fix a use-after-free bug in hv_eject_device_work()

Hi,

[This is an automated email]

This commit has been processed because it contains a "Fixes:" tag, fixing commit: 05f151a73ec2 PCI: hv: Fix a memory leak in hv_eject_device_work().

The bot has tested the following trees: v5.1.12, v4.19.53, v4.14.128, v4.9.182.

v5.1.12: Build OK! v4.19.53: Build OK! v4.14.128: Failed to apply! Possible dependencies: 8c99e120ffca ("PCI: hv: Remove unused reason for refcount handler")

v4.9.182: Failed to apply! Possible dependencies: 02c3764c776c ("PCI: hv: Temporary own CPU-number-to-vCPU-number infra") 0de8ce3ee8e3 ("PCI: hv: Allocate physically contiguous hypercall params buffer") 24196f0c7d4b ("PCI: hv: Convert hv_pci_dev.refs from atomic_t to refcount_t") 6ab42a66d2cc ("Drivers: hv: vmbus: Move Hypercall invocation code out of common code") 76d36ab79820 ("hv: switch to cpuhp state machine for synic init/cleanup") 7dcf90e9e032 ("PCI: hv: Use vPCI protocol version 1.2") 8730046c1498 ("Drivers: hv vmbus: Move Hypercall page setup out of common code") 8c99e120ffca ("PCI: hv: Remove unused reason for refcount handler") b1db7e7e1d70 ("PCI: hv: Add vPCI version protocol negotiation") d058fa7e98ff ("Drivers: hv: vmbus: Move the crash notification function")

How should we proceed with this patch?

-- Thanks, Sasha

The patch has not gone into any upstream trees yet. So we can not do anything at this point. I'll try to backport the patch for the old kernels once it's in.

Thanks, -- Dexuan