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Nikos Tsironis 8e714efc89 dm era: Update in-core bitset after committing the metadata 
commit 2099b145d77c1d53f5711f029c37cc537897cee6 upstream.

In case of a system crash, dm-era might fail to mark blocks as written
in its metadata, although the corresponding writes to these blocks were
passed down to the origin device and completed successfully.

Consider the following sequence of events:

1. We write to a block that has not been yet written in the current era
2. era_map() checks the in-core bitmap for the current era and sees
   that the block is not marked as written.
3. The write is deferred for submission after the metadata have been
   updated and committed.
4. The worker thread processes the deferred write
   (process_deferred_bios()) and marks the block as written in the
   in-core bitmap, **before** committing the metadata.
5. The worker thread starts committing the metadata.
6. We do more writes that map to the same block as the write of step (1)
7. era_map() checks the in-core bitmap and sees that the block is marked
   as written, **although the metadata have not been committed yet**.
8. These writes are passed down to the origin device immediately and the
   device reports them as completed.
9. The system crashes, e.g., power failure, before the commit from step
   (5) finishes.

When the system recovers and we query the dm-era target for the list of
written blocks it doesn't report the aforementioned block as written,
although the writes of step (6) completed successfully.

The issue is that era_map() decides whether to defer or not a write
based on non committed information. The root cause of the bug is that we
update the in-core bitmap, **before** committing the metadata.

Fix this by updating the in-core bitmap **after** successfully
committing the metadata.

Fixes: eec40579d84873 ("dm: add era target")
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Nikos Tsironis <ntsironis@arrikto.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2021-04-12 12:52:42 +08:00
..
accessibility
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acpi ACPI: configfs: add missing check after configfs_register_default_group() 2021-04-12 12:52:32 +08:00
amba amba: Fix resource leak for drivers without .remove 2021-04-12 12:52:26 +08:00
android binder: add flag to clear buffer on txn complete 2021-03-16 16:43:28 +08:00
ata ata: ahci_brcm: Add back regulators management 2021-04-12 12:52:20 +08:00
atm atm: idt77252: call pci_disable_device() on error path 2021-04-12 12:51:07 +08:00
auxdisplay auxdisplay: ht16k33: Fix refresh rate handling 2021-04-12 12:52:25 +08:00
base regmap: sdw: use _no_pm functions in regmap_read/write 2021-04-12 12:52:31 +08:00
bcma
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block floppy: reintroduce O_NDELAY fix 2021-04-12 12:52:37 +08:00
bluetooth Bluetooth: btusb: Fix memory leak in btusb_mtk_wmt_recv 2021-04-12 12:52:14 +08:00
bus bus: fsl-mc: fix error return code in fsl_mc_object_allocate() 2021-03-16 16:43:09 +08:00
cdrom
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char tpm_tis: Clean up locality release 2021-04-12 12:52:35 +08:00
clk clk: aspeed: Fix APLL calculate formula from ast2600-A2 2021-04-12 12:52:28 +08:00
clocksource clocksource/drivers/mxs_timer: Add missing semicolon when DEBUG is defined 2021-04-12 12:52:24 +08:00
connector
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counter
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cpufreq cpufreq: intel_pstate: Get per-CPU max freq via MSR_HWP_CAPABILITIES if available 2021-04-12 12:52:40 +08:00
cpuidle cpuidle: Fixup IRQ state 2021-03-16 16:35:25 +08:00
crypto crypto: sun4i-ss - initialize need_fallback 2021-04-12 12:52:36 +08:00
dax device-dax/core: Fix memory leak when rmmod dax.ko 2021-03-16 16:43:45 +08:00
dca
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devfreq PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out 2021-03-16 16:36:35 +08:00
dio
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dma dmaengine: hsu: disable spurious interrupt 2021-04-12 12:52:24 +08:00
dma-buf dmabuf: fix use-after-free of dmabuf's file->f_inode 2021-04-12 12:51:14 +08:00
edac EDAC/amd64: Fix PCI component registration 2021-03-16 16:43:29 +08:00
eisa
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extcon extcon: max77693: Fix modalias string 2021-03-16 16:43:12 +08:00
firewire
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firmware firmware: imx: select SOC_BUS to fix firmware build 2021-04-12 12:51:46 +08:00
fpga fpga: dfl: fix bug in port reset handshake 2021-03-16 16:32:23 +08:00
fsi
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gnss
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gpio gpio: pcf857x: Fix missing first interrupt 2021-04-12 12:52:39 +08:00
gpu drm/i915: Reject 446-480MHz HDMI clock on GLK 2021-04-12 12:52:41 +08:00
greybus
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hid HID: wacom: Ignore attempts to overwrite the touch_max value from HID 2021-04-12 12:52:32 +08:00
hsi HSI: Fix PM usage counter unbalance in ssi_hw_init 2021-04-12 12:52:22 +08:00
hv Drivers: hv: vmbus: Avoid use-after-free in vmbus_onoffer_rescind() 2021-04-12 12:52:21 +08:00
hwmon hwmon: (pwm-fan) Ensure that calculation doesn't discard big period values 2021-04-12 12:51:24 +08:00
hwspinlock
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hwtracing stm class: Fix module init return on allocation failure 2021-04-12 12:51:37 +08:00
i2c i2c: brcmstb: Fix brcmstd_send_i2c_cmd condition 2021-04-12 12:52:32 +08:00
i3c i3c master: fix missing destroy_workqueue() on error in i3c_master_register 2021-03-16 16:43:55 +08:00
ide scsi: ide: Do not set the RQF_PREEMPT flag for sense requests 2021-04-12 12:51:06 +08:00
idle
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iio iio: ad5504: Fix setting power-down state 2021-04-12 12:51:37 +08:00
infiniband RDMA/hns: Fixes missing error code of CMDQ 2021-04-12 12:52:29 +08:00
input Input: i8042 - add ASUS Zenbook Flip to noselftest list 2021-04-12 12:52:33 +08:00
interconnect interconnect: qcom: qcs404: Remove GPU and display RPM IDs 2021-03-16 16:42:11 +08:00
iommu iommu/vt-d: Do not use flush-queue when caching-mode is on 2021-04-12 12:51:57 +08:00
ipack
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irqchip irqchip/mips-cpu: Set IPI domain parent chip 2021-04-12 12:51:37 +08:00
isdn misdn: dsp: select CONFIG_BITREVERSE 2021-04-12 12:51:24 +08:00
leds leds: trigger: fix potential deadlock with libata 2021-04-12 12:51:44 +08:00
lightnvm lightnvm: fix memory leak when submit fails 2021-04-12 12:51:39 +08:00
macintosh macintosh/via-macii: Access autopoll_devs when inside lock 2021-03-16 16:33:39 +08:00
mailbox mailbox: avoid timer start from callback 2021-03-16 16:38:59 +08:00
mcb
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md dm era: Update in-core bitset after committing the metadata 2021-04-12 12:52:42 +08:00
media media: smipcie: fix interrupt handling and IR timeout 2021-04-12 12:52:39 +08:00
memory memory: ti-aemif: Drop child node when jumping out loop 2021-04-12 12:52:13 +08:00
memstick memstick: r592: Fix error return in r592_probe() 2021-03-16 16:43:02 +08:00
message scsi: mptfusion: Fix null pointer dereferences in mptscsih_remove() 2021-03-16 16:39:58 +08:00
mfd mfd: wm831x-auxadc: Prevent use after free in wm831x_auxadc_read_irq() 2021-04-12 12:52:27 +08:00
misc drivers/misc/vmw_vmci: restrict too big queue size in qp_host_alloc_queue 2021-04-12 12:52:36 +08:00
mmc mmc: sdhci-esdhc-imx: fix kernel panic when remove module 2021-04-12 12:52:39 +08:00
mtd mtd: spi-nor: hisi-sfc: Put child node np on error path 2021-04-12 12:52:38 +08:00
mux
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net net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending 2021-04-12 12:52:42 +08:00
nfc nfc: s3fwrn5: Release the nfc firmware 2021-03-16 16:43:15 +08:00
ntb NTB: hw: amd: fix an issue about leak system resources 2021-03-16 16:39:10 +08:00
nubus
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nvdimm libnvdimm/dimm: Avoid race between probe and available_slots_show() 2021-04-12 12:51:55 +08:00
nvme nvme-pci: ignore the subsysem NQN on Phison E16 2021-04-12 12:52:02 +08:00
nvmem nvmem: core: skip child nodes not matching binding 2021-04-12 12:52:30 +08:00
of of/fdt: Make sure no-map does not remove already reserved regions 2021-04-12 12:52:24 +08:00
opp opp: Reduce the size of critical section in _opp_table_kref_release() 2021-03-16 16:40:41 +08:00
oprofile
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parisc parisc: mask out enable and reserved bits from sba imask 2021-03-16 16:33:54 +08:00
parport
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pci PCI: Align checking of syscall user config accessors 2021-04-12 12:52:30 +08:00
pcmcia
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perf drivers/perf: thunderx2_pmu: Fix memory resource error handling 2021-03-16 16:38:23 +08:00
phy phy: rockchip-emmc: emmc_phy_init() always return 0 2021-04-12 12:52:29 +08:00
pinctrl pinctrl: ingenic: Fix JZ4760 support 2021-04-12 12:51:38 +08:00
platform platform/x86: hp-wmi: Disable tablet-mode reporting by default 2021-04-12 12:52:01 +08:00
pnp
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power power: reset: at91-sama5d2_shdwc: fix wkupdbc mask 2021-04-12 12:52:24 +08:00
powercap powercap: restrict energy meter to root access 2021-03-16 16:40:32 +08:00
pps
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ps3 powerpc/ps3: use dma_mapping_error() 2021-03-16 16:43:15 +08:00
ptp
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pwm pwm: rockchip: rockchip_pwm_probe(): Remove superfluous clk_unprepare() 2021-04-12 12:52:30 +08:00
rapidio rapidio: fix the missed put_device() for rio_mport_add_riodev 2021-03-16 16:38:59 +08:00
ras
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regulator regulator: qcom-rpmh: fix pm8009 ldo7 2021-04-12 12:52:28 +08:00
remoteproc remoteproc: qcom: Fix potential NULL dereference in adsp_init_mmio() 2021-03-16 16:43:11 +08:00
reset
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rpmsg rpmsg: glink: Use complete_all for open states 2021-03-16 16:39:50 +08:00
rtc rtc: s5m: select REGMAP_I2C 2021-04-12 12:52:24 +08:00
s390 virtio/s390: implement virtio-ccw revision 2 correctly 2021-04-12 12:52:40 +08:00
sbus
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scsi scsi: bnx2fc: Fix Kconfig warning & CNIC build errors 2021-04-12 12:52:32 +08:00
sfi
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sh
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siox
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slimbus slimbus: qcom-ngd-ctrl: Avoid sending power requests without QMI 2021-03-16 16:42:54 +08:00
soc soc: aspeed: snoop: Add clock control logic 2021-04-12 12:52:15 +08:00
soundwire soundwire: cadence: fix ACK/NAK handling 2021-04-12 12:52:29 +08:00
spi spi: spi-synquacer: fix set_cs handling 2021-04-12 12:52:40 +08:00
spmi spmi: spmi-pmic-arb: Fix hw_irq overflow 2021-04-12 12:52:39 +08:00
ssb
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staging staging: rtl8188eu: Add Edimax EW-7811UN V2 to device table 2021-04-12 12:52:37 +08:00
target cxgb4/chtls/cxgbit: Keeping the max ofld immediate data size same in cxgb4 and ulds 2021-04-12 12:52:16 +08:00
tc
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tee tee: optee: replace might_sleep with cond_resched 2021-04-12 12:51:45 +08:00
thermal thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed 2021-03-16 16:43:48 +08:00
thunderbolt thunderbolt: Fix use-after-free in remove_unplugged_switch() 2021-03-16 16:42:03 +08:00
tty serial: mvebu-uart: fix tx lost characters at power off 2021-04-12 12:51:37 +08:00
uio uio: avoid to request_irq when the legacy irq is not connected 2021-03-16 16:43:58 +08:00
usb USB: serial: mos7720: fix error code in mos7720_write() 2021-04-12 12:52:33 +08:00
vfio vfio/type1: Use follow_pte() 2021-04-12 12:52:31 +08:00
vhost vhost_net: fix ubuf refcount incorrectly when sendmsg fails 2021-04-12 12:51:09 +08:00
video fbdev: aty: SPARC64 requires FB_ATY_CT 2021-04-12 12:52:16 +08:00
virt virt: vbox: Do not use wait_event_interruptible when called from kernel context 2021-04-12 12:52:10 +08:00
virtio virtio_ring: Fix two use after free bugs 2021-03-16 16:43:19 +08:00
visorbus
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vlynq
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vme
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w1 w1: mxc_w1: Fix timeout resolution problem leading to bus error 2021-03-16 16:39:58 +08:00
watchdog watchdog: mei_wdt: request stop on unregister 2021-04-12 12:52:38 +08:00
xen xen-scsiback: don't "handle" error by BUG() 2021-04-12 12:52:08 +08:00
zorro
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Kconfig
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Makefile
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