From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sam Bobroff <sbobroff@linux.ibm.com>,
Oliver O'Halloran <oohall@gmail.com>,
linuxppc-dev@lists.ozlabs.org, Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 5.5 446/542] powerpc/sriov: Remove VF eeh_dev state when disabling SR-IOV
Date: Fri, 14 Feb 2020 10:47:18 -0500 [thread overview]
Message-ID: <20200214154854.6746-446-sashal@kernel.org> (raw)
In-Reply-To: <20200214154854.6746-1-sashal@kernel.org>
From: Oliver O'Halloran <oohall@gmail.com>
[ Upstream commit 1fb4124ca9d456656a324f1ee29b7bf942f59ac8 ]
When disabling virtual functions on an SR-IOV adapter we currently do not
correctly remove the EEH state for the now-dead virtual functions. When
removing the pci_dn that was created for the VF when SR-IOV was enabled
we free the corresponding eeh_dev without removing it from the child device
list of the eeh_pe that contained it. This can result in crashes due to the
use-after-free.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Sam Bobroff <sbobroff@linux.ibm.com>
Tested-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190821062655.19735-1-oohall@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/kernel/pci_dn.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index 9524009ca1ae4..d876eda926094 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -244,9 +244,22 @@ void remove_dev_pci_data(struct pci_dev *pdev)
continue;
#ifdef CONFIG_EEH
- /* Release EEH device for the VF */
+ /*
+ * Release EEH state for this VF. The PCI core
+ * has already torn down the pci_dev for this VF, but
+ * we're responsible to removing the eeh_dev since it
+ * has the same lifetime as the pci_dn that spawned it.
+ */
edev = pdn_to_eeh_dev(pdn);
if (edev) {
+ /*
+ * We allocate pci_dn's for the totalvfs count,
+ * but only only the vfs that were activated
+ * have a configured PE.
+ */
+ if (edev->pe)
+ eeh_rmv_from_parent_pe(edev);
+
pdn->edev = NULL;
kfree(edev);
}
--
2.20.1
next prev parent reply other threads:[~2020-02-14 16:38 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200214154854.6746-1-sashal@kernel.org>
2020-02-14 15:40 ` [PATCH AUTOSEL 5.5 012/542] soc: fsl: qe: change return type of cpm_muram_alloc() to s32 Sasha Levin
2020-02-14 15:40 ` [PATCH AUTOSEL 5.5 048/542] powerpc/powernv/iov: Ensure the pdn for VFs always contains a valid PE number Sasha Levin
2020-02-14 15:41 ` [PATCH AUTOSEL 5.5 096/542] powerpc/powernv/ioda: Fix ref count for devices with their own PE Sasha Levin
2020-02-17 8:49 ` Frederic Barrat
2020-02-20 16:12 ` Sasha Levin
2020-02-14 15:41 ` [PATCH AUTOSEL 5.5 097/542] powerpc/iov: Move VF pdev fixup into pcibios_fixup_iov() Sasha Levin
2020-02-14 15:41 ` [PATCH AUTOSEL 5.5 103/542] powerpc/papr_scm: Fix leaking 'bus_desc.provider_name' in some paths Sasha Levin
2020-02-14 15:41 ` [PATCH AUTOSEL 5.5 104/542] powerpc/pseries/vio: Fix iommu_table use-after-free refcount warning Sasha Levin
2020-02-14 15:42 ` [PATCH AUTOSEL 5.5 177/542] net/wan/fsl_ucc_hdlc: reject muram offsets above 64K Sasha Levin
2020-02-14 15:44 ` [PATCH AUTOSEL 5.5 266/542] net/wan/fsl_ucc_hdlc: remove set but not used variables 'ut_info' and 'ret' Sasha Levin
2020-02-14 15:44 ` [PATCH AUTOSEL 5.5 302/542] soc: fsl: qe: remove set but not used variable 'mm_gc' Sasha Levin
2020-02-14 15:46 ` [PATCH AUTOSEL 5.5 395/542] KVM: PPC: Remove set but not used variable 'ra', 'rs', 'rt' Sasha Levin
2020-02-14 15:46 ` [PATCH AUTOSEL 5.5 414/542] ide: remove set but not used variable 'hwif' Sasha Levin
2020-02-14 15:47 ` [PATCH AUTOSEL 5.5 444/542] powerpc/ptdump: Fix W+X verification call in mark_rodata_ro() Sasha Levin
2020-02-14 15:47 ` [PATCH AUTOSEL 5.5 445/542] powerpc/ptdump: Only enable PPC_CHECK_WX with STRICT_KERNEL_RWX Sasha Levin
2020-02-14 15:47 ` Sasha Levin [this message]
2020-02-14 15:47 ` [PATCH AUTOSEL 5.5 457/542] PCI/AER: Initialize aer_fifo Sasha Levin
2020-02-14 15:47 ` [PATCH AUTOSEL 5.5 464/542] powerpc/pseries/lparcfg: Fix display of Maximum Memory Sasha Levin
2020-02-14 15:47 ` [PATCH AUTOSEL 5.5 465/542] selftests/eeh: Bump EEH wait time to 60s Sasha Levin
2020-02-14 15:47 ` [PATCH AUTOSEL 5.5 483/542] powerpc/mm: Don't log user reads to 0xffffffff Sasha Levin
2020-02-14 15:48 ` [PATCH AUTOSEL 5.5 493/542] KVM: PPC: Book3S HV: Release lock on page-out failure path Sasha Levin
2020-02-14 15:48 ` [PATCH AUTOSEL 5.5 502/542] powerpc: Do not consider weak unresolved symbol relocations as bad Sasha Levin
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