From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Gonglei <arei.gonglei@huawei.com>,
Longpeng <longpeng2@huawei.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.14 22/42] virtio_pci: fix a NULL pointer reference in vp_del_vqs
Date: Thu, 9 May 2019 20:42:11 +0200 [thread overview]
Message-ID: <20190509181257.144468524@linuxfoundation.org> (raw)
In-Reply-To: <20190509181252.616018683@linuxfoundation.org>
[ Upstream commit 6a8aae68c87349dbbcd46eac380bc43cdb98a13b ]
If the msix_affinity_masks is alloced failed, then we'll
try to free some resources in vp_free_vectors() that may
access it directly.
We met the following stack in our production:
[ 29.296767] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 29.311151] IP: [<ffffffffc04fe35a>] vp_free_vectors+0x6a/0x150 [virtio_pci]
[ 29.324787] PGD 0
[ 29.333224] Oops: 0000 [#1] SMP
[...]
[ 29.425175] RIP: 0010:[<ffffffffc04fe35a>] [<ffffffffc04fe35a>] vp_free_vectors+0x6a/0x150 [virtio_pci]
[ 29.441405] RSP: 0018:ffff9a55c2dcfa10 EFLAGS: 00010206
[ 29.453491] RAX: 0000000000000000 RBX: ffff9a55c322c400 RCX: 0000000000000000
[ 29.467488] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9a55c322c400
[ 29.481461] RBP: ffff9a55c2dcfa20 R08: 0000000000000000 R09: ffffc1b6806ff020
[ 29.495427] R10: 0000000000000e95 R11: 0000000000aaaaaa R12: 0000000000000000
[ 29.509414] R13: 0000000000010000 R14: ffff9a55bd2d9e98 R15: ffff9a55c322c400
[ 29.523407] FS: 00007fdcba69f8c0(0000) GS:ffff9a55c2840000(0000) knlGS:0000000000000000
[ 29.538472] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 29.551621] CR2: 0000000000000000 CR3: 000000003ce52000 CR4: 00000000003607a0
[ 29.565886] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 29.580055] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 29.594122] Call Trace:
[ 29.603446] [<ffffffffc04fe8a2>] vp_request_msix_vectors+0xe2/0x260 [virtio_pci]
[ 29.618017] [<ffffffffc04fedc5>] vp_try_to_find_vqs+0x95/0x3b0 [virtio_pci]
[ 29.632152] [<ffffffffc04ff117>] vp_find_vqs+0x37/0xb0 [virtio_pci]
[ 29.645582] [<ffffffffc057bf63>] init_vq+0x153/0x260 [virtio_blk]
[ 29.658831] [<ffffffffc057c1e8>] virtblk_probe+0xe8/0x87f [virtio_blk]
[...]
Cc: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Longpeng <longpeng2@huawei.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/virtio/virtio_pci_common.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 1c4797e53f686..80a3704939cdc 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -254,9 +254,11 @@ void vp_del_vqs(struct virtio_device *vdev)
for (i = 0; i < vp_dev->msix_used_vectors; ++i)
free_irq(pci_irq_vector(vp_dev->pci_dev, i), vp_dev);
- for (i = 0; i < vp_dev->msix_vectors; i++)
- if (vp_dev->msix_affinity_masks[i])
- free_cpumask_var(vp_dev->msix_affinity_masks[i]);
+ if (vp_dev->msix_affinity_masks) {
+ for (i = 0; i < vp_dev->msix_vectors; i++)
+ if (vp_dev->msix_affinity_masks[i])
+ free_cpumask_var(vp_dev->msix_affinity_masks[i]);
+ }
if (vp_dev->msix_enabled) {
/* Disable the vector used for configuration */
--
2.20.1
next prev parent reply other threads:[~2019-05-09 18:45 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-09 18:41 [PATCH 4.14 00/42] 4.14.118-stable review Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 01/42] scsi: libsas: fix a race condition when smp task timeout Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 02/42] Drivers: hv: vmbus: Remove the undesired put_cpu_ptr() in hv_synic_cleanup() Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 03/42] ubsan: Fix nasty -Wbuiltin-declaration-mismatch GCC-9 warnings Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 04/42] staging: greybus: power_supply: fix prop-descriptor request size Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 05/42] ASoC: hdmi-codec: fix S/PDIF DAI Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 06/42] ASoC:soc-pcm:fix a codec fixup issue in TDM case Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 07/42] ASoC: nau8824: fix the issue of the widget with prefix name Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 08/42] ASoC: nau8810: fix the issue of widget with prefixed name Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 09/42] ASoC: samsung: odroid: Fix clock configuration for 44100 sample rate Greg Kroah-Hartman
2019-05-09 18:41 ` [PATCH 4.14 10/42] ASoC: wm_adsp: Add locking to wm_adsp2_bus_error Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 11/42] ASoC: cs4270: Set auto-increment bit for register writes Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 12/42] IB/hfi1: Eliminate opcode tests on mr deref Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 13/42] MIPS: KGDB: fix kgdb support for SMP platforms Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 14/42] ASoC: tlv320aic32x4: Fix Common Pins Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 15/42] drm/mediatek: Fix an error code in mtk_hdmi_dt_parse_pdata() Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 16/42] perf/x86/intel: Fix handling of wakeup_events for multi-entry PEBS Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 17/42] perf/x86/intel: Initialize TFA MSR Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 18/42] linux/kernel.h: Use parentheses around argument in u64_to_user_ptr() Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 19/42] xtensa: fix initialization of pt_regs::syscall in start_thread Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 20/42] ASoC: rockchip: pdm: fix regmap_ops hang issue Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 21/42] slab: fix a crash by reading /proc/slab_allocators Greg Kroah-Hartman
2019-05-09 18:42 ` Greg Kroah-Hartman [this message]
2019-05-09 18:42 ` [PATCH 4.14 23/42] RDMA/vmw_pvrdma: Fix memory leak on pvrdma_pci_remove Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 24/42] scsi: csiostor: fix missing data copy in csio_scsi_err_handler() Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 25/42] drm/mediatek: fix possible object reference leak Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 26/42] ASoC: Intel: kbl: fix wrong number of channels Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 27/42] virtio-blk: limit number of hw queues by nr_cpu_ids Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 28/42] platform/x86: pmc_atom: Drop __initconst on dmi table Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 29/42] iommu/amd: Set exclusion range correctly Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 30/42] genirq: Prevent use-after-free and work list corruption Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 31/42] usb: dwc3: Fix default lpm_nyet_threshold value Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 32/42] USB: serial: f81232: fix interrupt worker not stop Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 33/42] USB: cdc-acm: fix unthrottle races Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 34/42] usb-storage: Set virt_boundary_mask to avoid SG overflows Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 35/42] intel_th: pci: Add Comet Lake support Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 36/42] scsi: qla2xxx: Fix incorrect region-size setting in optrom SYSFS routines Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 37/42] Bluetooth: hidp: fix buffer overflow Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 38/42] Bluetooth: Align minimum encryption key size for LE and BR/EDR connections Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 39/42] UAS: fix alignment of scatter/gather segments Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 40/42] ASoC: Intel: avoid Oops if DMA setup fails Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 41/42] locking/futex: Allow low-level atomic operations to return -EAGAIN Greg Kroah-Hartman
2019-05-09 18:42 ` [PATCH 4.14 42/42] arm64: futex: Bound number of LDXR/STXR loops in FUTEX_WAKE_OP Greg Kroah-Hartman
2019-05-09 23:27 ` [PATCH 4.14 00/42] 4.14.118-stable review kernelci.org bot
2019-05-10 8:45 ` Naresh Kamboju
2019-05-10 10:16 ` Jon Hunter
2019-05-10 13:35 ` Guenter Roeck
2019-05-10 21:26 ` shuah
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