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cb30dfa75d55eced379a42fd67bd5fb7ec38555e
linux/drivers
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Jason Gunthorpe cb30dfa75d iommufd: Don't overflow during division for dirty tracking 
If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow
to 0 and this triggers divide by 0.

In this case the index should just be 0, so reorganize things to divide
by shift and avoid hitting any overflows.

Link: https://patch.msgid.link/r/0-v1-663679b57226+172-iommufd_dirty_div0_jgg@nvidia.com
Cc: stable@vger.kernel.org
Fixes: 58ccf0190d ("vfio: Add an IOVA bitmap support")
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reported-by: syzbot+093a8a8b859472e6c257@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=093a8a8b859472e6c257
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2025-10-20 19:58:37 -03:00
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accel
accel/qaic: Synchronize access to DBC request queue head & tail pointer
2025-10-14 08:56:31 -06:00
accessibility
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acpi
Merge tag 'acpi-6.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2025-10-07 09:45:07 -07:00
amba
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android
rust_binder: add Rust Binder driver
2025-09-19 09:40:46 +02:00
ata
ata: libata-core: relax checks in ata_read_log_directory()
2025-10-13 09:12:36 +02:00
atm
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auxdisplay
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base
Merge tag 'pm-6.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2025-10-07 09:39:51 -07:00
bcma
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block
Merge tag 'block-6.18-20251009' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2025-10-10 10:37:13 -07:00
bluetooth
Bluetooth: bcsp: receive data only if registered
2025-09-27 11:37:02 -04:00
bus
Merge tag 'char-misc-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2025-10-04 16:26:32 -07:00
cache
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cdrom
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cdx
Merge tag 'char-misc-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2025-10-04 16:26:32 -07:00
char
tpm_crb: Add idle support for the Arm FF-A start method
2025-10-18 14:33:22 +03:00
clk
Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
2025-10-07 09:28:37 -07:00
clocksource
Merge tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
2025-10-07 08:40:15 -07:00
comedi
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connector
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counter
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cpufreq
Merge tag 'cpufreq-arm-updates-6.18-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
2025-10-01 13:59:28 +02:00
cpuidle
cpuidle: Fail cpuidle device registration if there is one already
2025-09-20 13:08:54 +02:00
crypto
Merge tag 'v6.18-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2025-10-08 09:38:31 -07:00
cxl
cxl/trace: Subtract to find an hpa_alias0 in cxl_poison events
2025-10-14 14:48:14 -07:00
dax
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dca
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devfreq
PM / devfreq: rockchip-dfi: switch to FIELD_PREP_WM16 macro
2025-10-15 10:39:54 -04:00
dibs
dibs: Check correct variable in dibs_init()
2025-09-26 15:10:59 -07:00
dio
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dma
Merge tag 'dmaengine-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
2025-10-06 10:37:06 -07:00
dma-buf
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dpll
dpll: zl3073x: Handle missing or corrupted flash configuration
2025-10-13 17:24:36 -07:00
edac
Merge tag 'edac_updates_for_v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras
2025-09-30 11:41:03 -07:00
eisa
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extcon
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firewire
Merge tag 'firewire-updates-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
2025-10-01 12:52:43 -07:00
firmware
Merge tag 'efi-next-for-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
2025-10-05 12:08:14 -07:00
fpga
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fsi
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fwctl
pds_fwctl: Replace kzalloc + copy_from_user with memdup_user in pdsfc_fw_rpc
2025-09-22 10:33:10 -03:00
gnss
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gpio
gpio: wcd934x: mark the GPIO controller as sleeping
2025-10-10 09:37:19 +02:00
gpu
Merge tag 'drm-xe-fixes-2025-10-16' of https://gitlab.freedesktop.org/drm/xe/kernel into drm-fixes
2025-10-17 09:39:53 +10:00
greybus
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hid
Merge tag 'hid-for-linus-2025101701' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
2025-10-18 08:18:18 -10:00
hsi
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hte
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hv
Drivers: hv: Make CONFIG_HYPERV bool
2025-10-01 00:00:45 +00:00
hwmon
Merge tag 'gpio-updates-for-v6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2025-10-01 11:34:12 -07:00
hwspinlock
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hwtracing
Merge tag 'char-misc-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2025-10-04 16:26:32 -07:00
i2c
i2c: usbio: Add ACPI device-id for MTL-CVF devices
2025-10-14 13:54:43 +02:00
i3c
i3c: fix big-endian FIFO transfers
2025-09-29 00:17:22 +02:00
idle
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iio
Merge tag 'iio-for-6.18a' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next
2025-09-23 14:15:25 +02:00
infiniband
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
2025-10-03 18:35:22 -07:00
input
Merge tag 'input-for-v6.18-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2025-10-08 09:44:38 -07:00
interconnect
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iommu
iommufd: Don't overflow during division for dirty tracking
2025-10-20 19:58:37 -03:00
ipack
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irqchip
irqchip/sifive-plic: Avoid interrupt ID 0 handling during suspend/resume
2025-10-07 10:23:22 +02:00
isdn
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leds
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macintosh
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mailbox
Merge tag 'mailbox-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar/mailbox
2025-10-08 11:44:21 -07:00
mcb
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md
Merge tag 'for-6.18/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2025-10-03 18:48:02 -07:00
media
Merge tag 'usb-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
2025-10-04 16:07:08 -07:00
memory
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memstick
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-10-02 18:18:33 -07:00
message
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mfd
mfd: ls2kbmc: check for devm_mfd_add_devices() failure
2025-10-03 10:38:23 -05:00
misc
powerpc, ocxl: Fix extraction of struct xive_irq_data
2025-10-13 09:40:55 +05:30
mmc
rpmb: move rpmb_frame struct and constants to common header
2025-10-13 13:18:03 +02:00
most
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mtd
Merge tag 'mtd/for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
2025-10-04 15:50:37 -07:00
mux
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net
net: usb: lan78xx: fix use of improperly initialized dev->chipid in lan78xx_reset
2025-10-15 18:27:48 -07:00
nfc
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ntb
NTB: epf: Add Renesas rcar support
2025-09-22 09:35:21 -04:00
nubus
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nvdimm
Merge tag 'libnvdimm-for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2025-10-06 11:17:18 -07:00
nvme
nvme/tcp: handle tls partially sent records in write_space()
2025-10-16 11:32:04 -07:00
nvmem
Merge tag 'char-misc-6.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2025-10-07 12:13:26 -07:00
of
Merge tag 'devicetree-fixes-for-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
2025-10-10 13:05:40 -07:00
opp
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parisc
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parport
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pci
PCI/VGA: Select SCREEN_INFO on X86
2025-10-17 08:31:14 -05:00
pcmcia
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peci
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perf
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2025-10-07 08:59:25 -07:00
phy
Merge tag 'phy-for-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy
2025-10-06 10:34:22 -07:00
pinctrl
Merge tag 'pci-v6.18-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
2025-10-06 10:41:03 -07:00
platform
Merge tag 'platform-drivers-x86-v6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86
2025-10-04 15:28:18 -07:00
pmdomain
Merge tag 'soc-drivers-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2025-10-01 17:32:51 -07:00
pnp
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power
Merge tag 'for-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
2025-10-01 13:02:59 -07:00
powercap
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pps
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ps3
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ptp
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2025-10-01 10:14:49 +02:00
pwm
Merge tag 'gpio-updates-for-v6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2025-10-01 11:34:12 -07:00
rapidio
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ras
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regulator
Merge tag 'mfd-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
2025-10-01 12:04:12 -07:00
remoteproc
Merge tag 'rproc-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
2025-10-04 15:45:17 -07:00
reset
Merge tag 'soc-drivers-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2025-10-01 17:32:51 -07:00
rpmsg
rpmsg: qcom_smd: Fix fallback to qcom,ipc parse
2025-09-20 21:29:48 -05:00
rtc
Merge tag 'rtc-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
2025-10-11 11:56:47 -07:00
s390
Merge tag 's390-6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2025-10-09 10:51:43 -07:00
sbus
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scsi
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2025-10-11 11:49:00 -07:00
sh
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siox
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slimbus
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soc
Merge tag 'mips_6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
2025-10-05 10:09:55 -07:00
soundwire
Merge tag 'soundwire-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire
2025-10-06 10:32:22 -07:00
spi
Merge tag 'soc-drivers-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2025-10-01 17:32:51 -07:00
spmi
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ssb
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staging
Merge tag 'staging-6.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
2025-10-07 11:41:06 -07:00
target
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2025-10-11 11:49:00 -07:00
tc
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tee
Merge tag 'soc-drivers-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2025-10-01 17:32:51 -07:00
thermal
thermal: renesas: Fix RZ/G3E fall-out
2025-10-02 10:41:58 +02:00
thunderbolt
thunderbolt: Fix use-after-free in tb_dp_dprx_work
2025-09-23 17:16:38 +02:00
tty
Merge tag 'tty-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
2025-10-07 11:36:01 -07:00
ufs
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2025-10-11 11:49:00 -07:00
uio
Merge tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
2025-10-07 08:40:15 -07:00
usb
Merge tag 'usb-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
2025-10-04 16:07:08 -07:00
vdpa
vduse: Use fixed 4KB bounce pages for non-4KB page size
2025-10-01 07:24:55 -04:00
vfio
vfio: Dump migration features under debugfs
2025-10-06 11:22:48 -06:00
vhost
vdpa: support virtio_map
2025-10-01 07:24:43 -04:00
video
Merge tag 'fbdev-for-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
2025-10-10 09:36:23 -07:00
virt
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2025-09-29 18:48:39 -07:00
virtio
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
2025-10-04 08:48:16 -07:00
w1
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watchdog
Merge tag 'linux-watchdog-6.18-rc1' of git://www.linux-watchdog.org/linux-watchdog
2025-10-06 11:00:30 -07:00
xen
Merge tag 'dma-mapping-6.18-2025-09-30' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
2025-10-03 17:41:12 -07:00
zorro
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Kconfig
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Makefile
Merge tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
2025-10-07 08:40:15 -07:00