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Yi Liu 839e692fa4 vfio: Make vfio_df_open() single open for device cdev path 
VFIO group has historically allowed multi-open of the device FD. This
was made secure because the "open" was executed via an ioctl to the
group FD which is itself only single open.

However, no known use of multiple device FDs today. It is kind of a
strange thing to do because new device FDs can naturally be created
via dup().

When we implement the new device uAPI (only used in cdev path) there is
no natural way to allow the device itself from being multi-opened in a
secure manner. Without the group FD we cannot prove the security context
of the opener.

Thus, when moving to the new uAPI we block the ability of opening
a device multiple times. Given old group path still allows it we store
a vfio_group pointer in struct vfio_device_file to differentiate.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718135551.6592-10-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
 		2023-07-25 10:18:57 -06:00
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accel Memory leak fixes in drm/client, memory access/leak fixes for 2023-07-21 12:14:05 +10:00
accessibility
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acpi More ACPI updates for 6.5-rc1 2023-07-06 22:25:06 -07:00
amba
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android
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ata ata: pata_parport: Add missing protocol modules description 2023-07-17 08:30:41 +09:00
atm
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auxdisplay drm changes for 6.5-rc1: 2023-06-29 11:00:17 -07:00
base regmap: Disable locking for RBTREE and MAPLE unit tests 2023-07-20 13:57:01 +01:00
bcma
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block block-6.5-2023-07-21 2023-07-22 11:05:15 -07:00
bluetooth Bluetooth: btusb: Fix bluetooth on Intel Macbook 2014 2023-07-20 11:26:56 -07:00
bus SoC fixes for 6.5, part 1 2023-07-06 09:56:53 -07:00
cdrom cdrom/gdrom: Fix build error 2023-06-29 08:09:31 -06:00
cdx cdx: Replace custom mcdi logging with print_hex_dump_debug() 2023-06-15 13:42:16 +02:00
char tpm,tpm_tis: Disable interrupts after 1000 unhandled IRQs 2023-07-17 19:40:27 +00:00
clk Another set of clk driver updates and fixes for the merge window. The 2023-07-04 11:07:45 -07:00
clocksource RISC-V Patches for the 6.5 Merge Window, Part 1 2023-06-30 09:37:26 -07:00
comedi comedi: make all 'class' structures const 2023-06-23 10:29:02 +02:00
connector
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counter First set of Counter updates for the 6.5 cycle 2023-06-15 13:07:59 +02:00
cpufreq cpufreq: sparc: Don't mark cpufreq callbacks with __init 2023-07-12 12:45:18 +02:00
cpuidle
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crypto s390 updates for 6.5 merge window part 2 2023-07-06 13:18:30 -07:00
cxl cxl: Fix one kernel-doc comment 2023-06-29 16:03:58 -07:00
dax dax: enable dax fault handler to report VM_FAULT_HWPOISON 2023-06-26 07:54:23 -06:00
dca
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devfreq
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dio
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dma dmaengine updates for v6.5 2023-07-06 09:48:31 -07:00
dma-buf dma-buf/dma-resv: Stop leaking on krealloc() failure 2023-07-15 13:57:30 +02:00
edac - Add initial support for RAS hardware found on AMD server GPUs (MI200). 2023-06-26 15:09:18 -07:00
eisa
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extcon
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firewire firewire: net: fix use after free in fwnet_finish_incoming_packet() 2023-06-24 14:03:46 +09:00
firmware Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
fpga Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
fsi
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gnss
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gpio gpio: mvebu: fix irq domain leak 2023-07-20 14:38:36 +02:00
gpu drm/atomic: Fix potential use-after-free in nonblocking commits 2023-07-21 09:53:30 -07:00
greybus
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hid for-linus-2023071101 2023-07-12 11:56:22 -07:00
hsi
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hte
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hv x86/hyperv: Fix hyperv_pcpu_input_arg handling when CPUs go online/offline 2023-06-17 23:09:47 +00:00
hwmon driver core changes for 6.5-rc1 2023-07-03 12:56:23 -07:00
hwspinlock
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hwtracing Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
i2c Part 2 of I2C patches for 6.5 2023-07-08 12:28:00 -07:00
i3c
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idle Revert "intel_idle: Add support for using intel_idle in a VM guest using just hlt" 2023-07-19 20:10:03 +02:00
iio driver core changes for 6.5-rc1 2023-07-03 12:56:23 -07:00
infiniband v6.5 merge window RDMA pull request 2023-06-29 21:01:17 -07:00
input ARM: SoC changes for 6.5 2023-06-29 15:28:33 -07:00
interconnect
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iommu iommufd: Add helper to retrieve iommufd_ctx and devid 2023-07-25 10:17:55 -06:00
ipack
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irqchip RISC-V Patches for the 6.5 Merge Window, Part 1 2023-06-30 09:37:26 -07:00
isdn
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leds - New Drivers 2023-07-03 11:26:05 -07:00
macintosh macintosh: Use of_property_read_reg() to parse "reg" 2023-06-21 14:08:54 +10:00
mailbox mailbox: ti-msgmgr: Fill non-message tx data fields with 0x0 2023-06-30 17:35:45 -05:00
mcb
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md hardening fixes for v6.5-rc1 2023-07-08 12:08:39 -07:00
media media updates for v6.5-rc1 2023-07-05 10:42:32 -07:00
memory asm-generic updates for 6.5 2023-07-06 10:06:04 -07:00
memstick
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message
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mfd - New Drivers 2023-07-03 10:55:04 -07:00
misc Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
mmc mmc: Revert "mmc: core: Allow mmc_start_host() synchronously detect a card" 2023-06-30 14:06:51 +02:00
most
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mtd Core MTD changes: 2023-06-28 14:02:03 -07:00
mux mux: adg792a: Switch back to use i2c_driver's .probe() 2023-06-15 13:42:18 +02:00
net net: phy: prevent stale pointer dereference in phy_init() 2023-07-20 12:47:25 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-06-22 18:40:38 -07:00
ntb ntb: hw: amd: Fix debugfs_create_dir error checking 2023-07-08 13:55:44 -04:00
nubus
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nvdimm dax: enable dax fault handler to report VM_FAULT_HWPOISON 2023-06-26 07:54:23 -06:00
nvme SCSI fixes on 20230714 2023-07-14 19:57:29 -07:00
nvmem nvmem: rmem: Use NVMEM_DEVID_AUTO 2023-06-15 13:42:18 +02:00
of of: Preserve "of-display" device name for compatibility 2023-07-11 16:33:01 -06:00
opp OPP: Properly propagate error along when failing to get icc_path 2023-06-27 07:35:14 +05:30
parisc parisc: Move init function declarations into header file 2023-06-30 17:14:15 +02:00
parport Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
pci Fixes for pci_clean_master, error handling in driver inits, and various 2023-07-09 09:35:51 -07:00
pcmcia pcmcia: rsrc_nonstatic: Fix memory leak in nonstatic_release_resource_db() 2023-06-15 13:42:18 +02:00
peci
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perf perf: RISC-V: Remove PERF_HES_STOPPED flag checking in riscv_pmu_start() 2023-07-12 07:41:23 -07:00
phy phy-for-6.5-v2 2023-07-05 21:38:13 -07:00
pinctrl pinctrl: renesas: Fixes for v6.5 2023-07-13 00:05:52 +02:00
platform platform/x86: touchscreen_dmi: Add info for the Archos 101 Cesium Educ tablet 2023-07-11 12:15:30 +02:00
pnp
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power power supply and reset changes for the 6.5 series 2023-07-03 17:23:16 -07:00
powercap ARM: SoC drivers for 6.5 2023-06-29 15:22:19 -07:00
pps
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ps3
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ptp ptp: Make max_phase_adjustment sysfs device attribute invisible when not supported 2023-07-03 13:17:25 -07:00
pwm pwm: Changes for v6.5-rc1 2023-07-05 12:55:06 -07:00
rapidio
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ras
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regulator regulator: da9063: fix null pointer deref with partial DT config 2023-07-17 06:15:18 +01:00
remoteproc remoteproc updates for v6.5 2023-07-03 17:03:05 -07:00
reset ARM: SoC drivers for 6.5 2023-06-29 15:22:19 -07:00
rpmsg
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rtc RTC for 6.5 2023-07-03 10:43:10 -07:00
s390 s390/zcrypt: fix reply buffer calculations for CCA replies 2023-07-20 16:48:56 +02:00
sbus oradax: make 'cl' a static const structure 2023-06-23 10:27:02 +02:00
scsi scsi: storvsc: Handle SRB status value 0x30 2023-07-11 12:38:49 -04:00
sh
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siox
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slimbus
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soc USB / Thunderbolt driver updates for 6.5-rc1 2023-07-03 13:23:10 -07:00
soundwire soundwire: stream: Make master_list ordered to prevent deadlocks 2023-06-21 16:31:45 +05:30
spi spi: Fixes for v6.5 2023-07-15 08:51:02 -07:00
spmi
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ssb
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staging media updates for v6.5-rc1 2023-07-05 10:42:32 -07:00
target SCSI misc on 20230708 2023-07-08 12:35:18 -07:00
tc
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tee ARM: SoC drivers for 6.5 2023-06-29 15:22:19 -07:00
thermal Thermal control updates for 6.5-rc1 2023-06-26 19:41:26 -07:00
thunderbolt thunderbolt: Add test case for 3 DisplayPort tunnels 2023-06-16 09:53:29 +03:00
tty TTY/Serial driver updates for 6.5-rc1. 2023-07-03 13:14:58 -07:00
ufs Merge branch '6.5/scsi-staging' into 6.5/scsi-fixes 2023-07-11 12:15:15 -04:00
uio
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usb USB / Thunderbolt driver updates for 6.5-rc1 2023-07-03 13:23:10 -07:00
vdpa virtio: features, fixes, cleanups 2023-07-03 15:38:26 -07:00
vfio vfio: Make vfio_df_open() single open for device cdev path 2023-07-25 10:18:57 -06:00
vhost virtio: features, fixes, cleanups 2023-07-03 15:38:26 -07:00
video fbdev: Explicitly include correct DT includes 2023-07-20 07:56:30 +02:00
virt workqueue: Ordered workqueue creation cleanups 2023-06-27 16:46:06 -07:00
virtio virtio: allow caller to override device DMA mask in vp_modern 2023-06-27 10:47:08 -04:00
vlynq
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w1
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watchdog watchdog: sp5100_tco: support Hygon FCH/SCH (Server Controller Hub) 2023-06-26 14:30:07 +02:00
xen xen: branch for v6.5-rc2 2023-07-13 13:39:36 -07:00
zorro
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Kconfig
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Makefile
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