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Dan Williams 908272a5e9 dm/dax: Fix table reference counts 
commit 02186d8897d49b0afd3c80b6cf23437d91024065 upstream.

A recent fix to the dm_dax_supported() flow uncovered a latent bug. When
dm_get_live_table() fails it is still required to drop the
srcu_read_lock(). Without this change the lvm2 test-suite triggers this
warning:

    # lvm2-testsuite --only pvmove-abort-all.sh

    WARNING: lock held when returning to user space!
    5.9.0-rc5+ #251 Tainted: G           OE
    ------------------------------------------------
    lvm/1318 is leaving the kernel with locks still held!
    1 lock held by lvm/1318:
     #0: ffff9372abb5a340 (&md->io_barrier){....}-{0:0}, at: dm_get_live_table+0x5/0xb0 [dm_mod]

...and later on this hang signature:

    INFO: task lvm:1344 blocked for more than 122 seconds.
          Tainted: G           OE     5.9.0-rc5+ #251
    "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    task:lvm             state:D stack:    0 pid: 1344 ppid:     1 flags:0x00004000
    Call Trace:
     __schedule+0x45f/0xa80
     ? finish_task_switch+0x249/0x2c0
     ? wait_for_completion+0x86/0x110
     schedule+0x5f/0xd0
     schedule_timeout+0x212/0x2a0
     ? __schedule+0x467/0xa80
     ? wait_for_completion+0x86/0x110
     wait_for_completion+0xb0/0x110
     __synchronize_srcu+0xd1/0x160
     ? __bpf_trace_rcu_utilization+0x10/0x10
     __dm_suspend+0x6d/0x210 [dm_mod]
     dm_suspend+0xf6/0x140 [dm_mod]

Fixes: 7bf7eac8d6 ("dax: Arrange for dax_supported check to span multiple devices")
Cc: <stable@vger.kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Reported-by: Adrian Huang <ahuang12@lenovo.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Adrian Huang <ahuang12@lenovo.com>
Link: https://lore.kernel.org/r/160045867590.25663.7548541079217827340.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2020-09-23 12:40:47 +02:00
..
accessibility
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acpi ACPICA: Do not increment operation_region reference counts for field units 2020-08-19 08:16:05 +02:00
amba
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android binder: Prevent context manager from incrementing ref 0 2020-08-11 15:33:35 +02:00
ata libata: implement ATA_HORKAGE_MAX_TRIM_128M and apply to Sandisks 2020-09-09 19:12:34 +02:00
atm firestream: Fix memleak in fs_open 2020-09-17 13:47:45 +02:00
auxdisplay
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base firmware_loader: fix memory leak for paged buffer 2020-09-23 12:40:34 +02:00
bcma
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block rbd: require global CAP_SYS_ADMIN for mapping and unmapping 2020-09-17 13:47:53 +02:00
bluetooth Bluetooth: hci_serdev: Only unregister device if it was registered 2020-08-19 08:16:16 +02:00
bus bus: ti-sysc: Add missing quirk flags for usb_host_hs 2020-08-19 08:16:00 +02:00
cdrom
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char tpm: Unify the mismatching TPM space buffer sizes 2020-08-19 08:16:27 +02:00
clk clk: rockchip: Fix initialization of mux_pll_src_4plls_p 2020-09-23 12:40:39 +02:00
clocksource arm64: arch_timer: Disable the compat vdso for cores affected by ARM64_WORKAROUND_1418040 2020-07-22 09:32:51 +02:00
connector
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counter counter: 104-quad-8: Add lock guards - generic interface 2020-05-02 08:48:44 +02:00
cpufreq cpufreq: intel_pstate: Fix intel_pstate_get_hwp_max() for turbo disabled 2020-09-17 13:47:49 +02:00
cpuidle cpuidle: Fixup IRQ state 2020-09-09 19:12:21 +02:00
crypto crypto: caam - Remove broken arc4 support 2020-08-21 13:05:32 +02:00
dax device-dax: don't leak kernel memory to user space after unloading kmem 2020-05-27 17:46:48 +02:00
dca
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devfreq PM / devfreq: rk3399_dmc: Fix kernel oops when rockchip,pmu is absent 2020-09-03 11:26:50 +02:00
dio
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dma drivers/dma/dma-jz4780: Fix race condition between probe and irq handler 2020-09-17 13:47:46 +02:00
dma-buf dmabuf: use spinlock to access dmabuf->name 2020-07-29 10:18:29 +02:00
edac EDAC/{i7core,sb,pnd2,skx}: Fix error event severity 2020-09-03 11:26:53 +02:00
eisa
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extcon extcon: adc-jack: Fix an error handling path in 'adc_jack_probe()' 2020-06-24 17:50:36 +02:00
firewire
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firmware efi: add missed destroy_workqueue when efisubsys_init fails 2020-08-26 10:41:07 +02:00
fpga fpga: dfl: fix bug in port reset handshake 2020-07-29 10:18:31 +02:00
fsi
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gnss gnss: sirf: fix error return code in sirf_probe() 2020-06-22 09:31:20 +02:00
gpio gpio: arizona: put pm_runtime in case of failure 2020-07-29 10:18:26 +02:00
gpu drm/i915: Filter wake_flags passed to default_wake_function 2020-09-23 12:40:43 +02:00
greybus
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hid HID: elan: Fix memleak in elan_input_configured 2020-09-17 13:47:48 +02:00
hsi
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hv Drivers: hv: vmbus: Add timeout to vmbus_wait_for_unload 2020-09-23 12:40:40 +02:00
hwmon hwmon: (applesmc) check status earlier. 2020-09-09 19:12:20 +02:00
hwspinlock
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hwtracing coresight: tmc: Fix TMC mode read in tmc_read_unprepare_etb() 2020-08-19 08:16:14 +02:00
i2c i2c: i801: Fix resume bug 2020-09-23 12:40:44 +02:00
i3c
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ide ide: serverworks: potential overflow in svwks_set_pio_mode() 2020-02-24 08:36:53 +01:00
idle
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iio iio:accel:mma8452: Fix timestamp alignment and prevent data leak. 2020-09-17 13:47:51 +02:00
infiniband RDMA/bnxt_re: Restrict the max_gids to 256 2020-09-23 12:40:33 +02:00
input Input: i8042 - add Entroware Proteus EL07R4 to nomux and reset lists 2020-09-23 12:40:45 +02:00
interconnect
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iommu iommu/amd: Fix potential @entry null deref 2020-09-23 12:40:42 +02:00
ipack ipack: tpci200: fix error return code in tpci200_register() 2020-05-27 17:46:47 +02:00
irqchip irqchip/stm32-exti: Avoid losing interrupts due to clearing pending bits by mistake 2020-09-03 11:27:06 +02:00
isdn
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leds leds: core: Flush scheduled work for system suspend 2020-08-19 08:16:11 +02:00
lightnvm
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macintosh macintosh/via-macii: Access autopoll_devs when inside lock 2020-08-19 08:16:15 +02:00
mailbox mailbox: zynqmp-ipi: Fix NULL vs IS_ERR() check in zynqmp_ipi_mbox_probe() 2020-06-24 17:50:36 +02:00
mcb
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md dm/dax: Fix table reference counts 2020-09-23 12:40:47 +02:00
media media: rc: uevent sysfs file races with rc_unregister_device() 2020-09-09 19:12:34 +02:00
memory
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memstick
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message scsi: mptscsih: Fix read sense data size 2020-07-16 08:16:36 +02:00
mfd mfd: intel-lpss: Add Intel Tiger Lake PCH-H PCI IDs 2020-09-03 11:26:43 +02:00
misc habanalabs: check correct vmalloc return code 2020-09-09 19:12:21 +02:00
mmc mmc: sdhci-of-esdhc: Don't walk device-tree on every interrupt 2020-09-17 13:47:53 +02:00
mtd mtd: rawnand: fsl_upm: Remove unused mtd var 2020-08-21 13:05:30 +02:00
mux
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net hv_netvsc: Remove "unlikely" from netvsc_select_queue 2020-09-23 12:40:34 +02:00
nfc NFC: st95hf: Fix memleak in st95hf_in_send_cmd 2020-09-17 13:47:45 +02:00
ntb NTB: perf: Fix race condition when run with ntb_test 2020-06-24 17:50:41 +02:00
nubus
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nvdimm libnvdimm/security: ensure sysfs poll thread woke up and fetch updated attr 2020-08-21 13:05:35 +02:00
nvme nvme-tcp: cancel async events before freeing event struct 2020-09-23 12:40:37 +02:00
nvmem nvmem: qfprom: remove incorrect write support 2020-06-10 20:24:57 +02:00
of of: of_mdio: Correct loop scanning logic 2020-07-22 09:32:55 +02:00
opp opp: Enable resources again if they were disabled earlier 2020-08-26 10:40:53 +02:00
oprofile
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parisc parisc: mask out enable and reserved bits from sba imask 2020-08-19 08:16:26 +02:00
parport
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pci PCI: qcom: Add missing reset for ipq806x 2020-09-03 11:26:53 +02:00
pcmcia
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perf drivers/perf: Prevent forced unbinding of PMU drivers 2020-07-29 10:18:40 +02:00
phy phy: qcom-qmp: Use correct values for ipq8074 PCIe Gen2 PHY init 2020-09-17 13:47:55 +02:00
pinctrl pinctrl: ingenic: Properly detect GPIO direction when configured for IRQ 2020-08-21 13:05:29 +02:00
platform platform/chrome: cros_ec_ishtp: Fix a double-unlock issue 2020-08-21 13:05:30 +02:00
pnp
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power power: supply: check if calc_soc succeeded in pm860x_init_battery 2020-08-19 08:16:16 +02:00
powercap
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pps
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ps3
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ptp
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pwm pwm: bcm-iproc: handle clk_get_rate() return 2020-08-21 13:05:34 +02:00
rapidio rapidio: Replace 'select' DMAENGINES 'with depends on' 2020-09-23 12:40:36 +02:00
ras
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regulator regulator: pwm: Fix machine constraints application 2020-09-23 12:40:35 +02:00
remoteproc remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load 2020-08-21 13:05:29 +02:00
reset reset: uniphier: Add SCSSI reset control for each channel 2020-02-24 08:36:41 +01:00
rpmsg
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rtc rtc: goldfish: Enable interrupt in set_alarm() when necessary 2020-08-26 10:40:54 +02:00
s390 s390/zcrypt: fix kmalloc 256k failure 2020-09-23 12:40:46 +02:00
sbus
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scsi scsi: libsas: Fix error path in sas_notify_lldd_dev_found() 2020-09-23 12:40:40 +02:00
sfi
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sh
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siox
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slimbus slimbus: core: Fix mismatch in of_node_get/put 2020-07-22 09:33:08 +02:00
soc soc: qcom: rpmh-rsc: Set suppress_bind_attrs flag 2020-08-19 08:15:59 +02:00
soundwire soundwire: fix double free of dangling pointer 2020-09-17 13:47:43 +02:00
spi spi: Fix memory leak on splited transfers 2020-09-23 12:40:38 +02:00
spmi spmi: pmic-arb: Set lockdep class for hierarchical irq domains 2020-02-19 19:53:07 +01:00
ssb
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staging staging: greybus: audio: fix uninitialized value issue 2020-09-17 13:47:55 +02:00
target scsi: target: iscsi: Fix hang in iscsit_access_np() when getting tpg->np_login_sem 2020-09-17 13:47:53 +02:00
tc
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tee tee: optee: Fix compilation issue with nommu 2020-02-05 21:22:49 +00:00
thermal thermal: qcom-spmi-temp-alarm: Don't suppress negative temp 2020-09-09 19:12:29 +02:00
thunderbolt thunderbolt: Prevent crash if non-active NVMem file is read 2020-02-28 17:22:13 +01:00
tty serial: 8250_pci: Add Realtek 816a and 816b 2020-09-23 12:40:45 +02:00
uio uio_pdrv_genirq: fix use without device tree and no interrupt 2020-07-22 09:33:13 +02:00
usb ehci-hcd: Move include to keep CRC stable 2020-09-23 12:40:46 +02:00
vfio vfio/pci: Fix SR-IOV VF handling with MMIO blocking 2020-09-09 19:12:36 +02:00
vhost vhost/scsi: fix up req type endian-ness 2020-08-05 09:59:42 +02:00
video fbcon: Fix user font detection test at fbcon_resize(). 2020-09-23 12:40:41 +02:00
virt virt: vbox: Fix guest capabilities mask check 2020-07-22 09:33:11 +02:00
virtio virtio_ring: Avoid loop when vq is broken in virtqueue_poll 2020-08-26 10:40:57 +02:00
visorbus visorbus: fix uninitialized variable access 2020-02-24 08:36:47 +01:00
vlynq
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vme vme: bridges: reduce stack usage 2020-02-24 08:36:48 +01:00
w1 w1: omap-hdq: cleanup to add missing newline for some dev_dbg 2020-06-22 09:31:26 +02:00
watchdog watchdog: initialize device before misc_register 2020-08-21 13:05:36 +02:00
xen xen/xenbus: Fix granting of vmalloc'd memory 2020-09-09 19:12:22 +02:00
zorro
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Kconfig
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Makefile
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