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Kohei Enju e08a9fac5c vhost_net: fix sleeping with preempt-disabled in vhost_net_busy_poll() 
syzbot reported "sleeping function called from invalid context" in
vhost_net_busy_poll().

Commit 0308813724 ("vhost_net: basic polling support") introduced a
busy-poll loop and preempt_{disable,enable}() around it, where each
iteration calls a sleepable function inside the loop.

The purpose of disabling preemption was to keep local_clock()-based
timeout accounting on a single CPU, rather than as a requirement of
busy-poll itself:

https://lore.kernel.org/1448435489-5949-4-git-send-email-jasowang@redhat.com

From this perspective, migrate_disable() is sufficient here, so replace
preempt_disable() with migrate_disable(), avoiding sleepable accesses
from a preempt-disabled context.

Fixes: 0308813724 ("vhost_net: basic polling support")
Tested-by: syzbot+6985cb8e543ea90ba8ee@syzkaller.appspotmail.com
Reported-by: syzbot+6985cb8e543ea90ba8ee@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/69e6a414.050a0220.24bfd3.002d.GAE@google.com/T/
Signed-off-by: Kohei Enju <kohei@enjuk.jp>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-23 11:53:31 -07:00
..
accel
accel: ethosu: Add hardware dependency hint
2026-04-02 15:18:14 -05:00
accessibility
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
acpi
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2026-04-14 16:48:56 -07:00
amba
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
android
Merge tag 'rust-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
2026-04-13 09:54:20 -07:00
ata
ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585
2026-04-07 09:36:46 +02:00
atm
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
auxdisplay
auxdisplay: line-display: fix NULL dereference in linedisp_release
2026-03-27 09:54:31 +01:00
base
Merge tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2026-04-14 18:36:10 -07:00
bcma
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
block
Merge tag 'x86-cleanups-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 14:03:27 -07:00
bluetooth
Bluetooth: hci_qca: Fix missing wakeup during SSR memdump handling
2026-04-13 09:19:42 -04:00
bus
bus: fsl-mc: use generic driver_override infrastructure
2026-04-04 20:41:25 +02:00
cache
cache: ax45mp: Fix device node reference leak in ax45mp_cache_init()
2026-02-06 19:54:40 +00:00
cdrom
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
cdx
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
char
random: vDSO: Remove ifdeffery
2026-03-11 15:22:49 +01:00
clk
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-03-26 12:09:57 -07:00
clocksource
clocksource: Rewrite watchdog code completely
2026-03-20 13:36:32 +01:00
comedi
comedi: dt2815: add hardware detection to prevent crash
2026-04-02 14:40:27 +02:00
connector
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
counter
counter: rz-mtu3-cnt: do not use struct rz_mtu3_channel's dev member
2026-03-22 15:59:22 +09:00
cpufreq
Merge tag 'pm-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2026-04-13 19:47:52 -07:00
cpuidle
Merge tag 'powerpc-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2026-04-14 17:10:15 -07:00
crypto
Merge tag 'x86_sev_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 15:20:54 -07:00
cxl
cxl: Adjust the startup priority of cxl_pmem to be higher than that of cxl_acpi
2026-03-19 15:12:40 -07:00
dax
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
dca
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
devfreq
PM / devfreq: tegra30-devfreq: add support for Tegra114
2026-04-04 03:15:39 +09:00
dibs
dibs: change dibs_class to a const struct
2026-03-04 18:48:15 -08:00
dio
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
dma
dmaengine: xilinx_dma: Fix reset related timeout with two-channel AXIDMA
2026-03-17 16:33:32 +05:30
dma-buf
treewide: change inode->i_ino from unsigned long to u64
2026-03-06 14:31:28 +01:00
dpll
dpll: zl3073x: add ref-sync pair support
2026-04-12 08:27:34 -07:00
edac
Merge tag 'ras_core_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 15:32:39 -07:00
eisa
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
extcon
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
firewire
bonding: prevent potential infinite loop in bond_header_parse()
2026-03-16 19:29:45 -07:00
firmware
Merge tag 'x86-platform-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 14:10:44 -07:00
fpga
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
fsi
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
fwctl
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
gnss
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
gpib
gpib: fix use-after-free in IO ioctl handlers
2026-04-02 14:30:40 +02:00
gpio
Merge tag 'gpio-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-13 20:10:58 -07:00
gpu
Merge tag 'bitmap-for-v7.1' of https://github.com/norov/linux
2026-04-14 08:55:18 -07:00
greybus
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
hid
Merge tag 'hid-for-linus-2026040801' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
2026-04-08 13:38:30 -07:00
hsi
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
hte
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
hv
Merge tag 'irq-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 10:02:41 -07:00
hwmon
hwmon: (asus-ec-sensors) Fix T_Sensor for PRIME X670E-PRO WIFI
2026-04-01 07:45:57 -07:00
hwspinlock
Merge tag 'soc-drivers-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2026-02-10 20:45:30 -08:00
hwtracing
coresight: don't use bitmap_print_to_pagebuf()
2026-04-09 13:28:05 -04:00
i2c
Merge tag 'driver-core-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
2026-04-13 19:03:11 -07:00
i3c
i3c: dw-i3c-master: Set SIR_REJECT in DAT on device attach and reattach
2026-03-11 22:50:29 +01:00
idle
intel_idle: Add Panther Lake C-states table
2026-03-11 12:52:00 +01:00
iio
Merge tag 'iio-fixes-for-7.0c' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-linus
2026-03-29 15:27:12 +02:00
infiniband
Merge tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2026-04-14 18:36:10 -07:00
input
Merge tag 'input-for-v7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2026-04-11 11:12:38 -07:00
interconnect
interconnect: qcom: sm8450: Fix NULL pointer dereference in icc_link_nodes()
2026-03-14 12:53:13 +02:00
iommu
Merge tag 'iommu-fixes-v7.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux
2026-04-09 08:36:31 -07:00
ipack
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
irqchip
Merge tag 'irq-msi-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 10:23:19 -07:00
isdn
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
leds
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
macintosh
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
mailbox
treewide: Replace kmalloc with kmalloc_obj for non-scalar types
2026-02-21 01:02:28 -08:00
mcb
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
md
md/raid5: fix soft lockup in retry_aligned_read()
2026-04-07 15:13:52 +08:00
media
media: ccs: Avoid deadlock in ccs_init_state()
2026-03-26 13:14:07 +01:00
memory
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
memstick
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
message
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
mfd
Convert more 'alloc_obj' cases to default GFP_KERNEL arguments
2026-02-21 20:03:00 -08:00
misc
Merge tag 'hardening-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2026-04-13 17:52:29 -07:00
mmc
mmc: vub300: fix use-after-free on disconnect
2026-03-31 13:11:20 +02:00
most
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
mtd
mtd: rawnand: pl353: make sure optimal timings are applied
2026-03-18 18:08:25 +01:00
mux
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
net
nfp: fix swapped arguments in nfp_encode_basic_qdr() calls
2026-04-23 11:01:20 -07:00
nfc
Merge tag 'gpio-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-13 20:10:58 -07:00
ntb
Merge branch 'nocache-cleanup'
2026-04-13 08:39:51 -07:00
nubus
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
nvdimm
Merge tag 'vfs-7.1-rc1.integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2026-04-13 10:40:26 -07:00
nvme
Merge tag 'for-7.1/io_uring-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2026-04-13 16:22:30 -07:00
nvmem
nvmem: zynqmp_nvmem: Fix buffer size in DMA and memcpy
2026-04-02 16:44:40 +02:00
of
device property: Make modifications of fwnode "flags" thread safe
2026-03-26 22:00:59 +01:00
opp
OPP: Move break out of scoped_guard in dev_pm_opp_xlate_required_opp()
2026-02-23 11:05:59 +05:30
parisc
Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses
2026-02-22 08:26:33 -08:00
parport
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
pci
Merge tag 'acpi-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2026-04-13 19:25:07 -07:00
pcmcia
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
peci
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
perf
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2026-04-14 16:48:56 -07:00
phy
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-04-02 11:03:13 -07:00
pinctrl
Merge tag 'gpio-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-13 20:10:58 -07:00
platform
Merge tag 'acpi-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2026-04-13 19:25:07 -07:00
pmdomain
pmdomain: imx8mp-blk-ctrl: Keep the NOC_HDCP clock enabled
2026-04-01 13:03:07 +02:00
pnp
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
power
Merge tag 'pwrseq-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-13 20:28:22 -07:00
powercap
powercap: intel_rapl: Consolidate PL4 and PMU support flags into rapl_defaults
2026-04-01 16:03:05 +02:00
pps
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
ps3
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
ptp
ptp: vmw: Convert to a platform driver
2026-03-17 19:06:19 -07:00
pwm
pwm: th1520: remove impl Send/Sync for Th1520PwmDriverData
2026-04-03 11:57:35 +02:00
rapidio
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
ras
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
regulator
Merge tag 'gpio-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-13 20:10:58 -07:00
remoteproc
remoteproc: imx_rproc: Fix unreachable platform prepare_ops
2026-03-05 10:18:23 -07:00
resctrl
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2026-04-14 16:48:56 -07:00
reset
reset: spacemit: k3: Decouple composite reset lines
2026-03-23 12:25:47 +01:00
rpmsg
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
rtc
rtc: cmos: Do not require IRQ if ACPI alarm is used
2026-04-04 19:14:58 +02:00
s390
Merge tag 'driver-core-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
2026-04-13 19:03:11 -07:00
sbus
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
scsi
Merge tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2026-04-14 18:36:10 -07:00
sh
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
siox
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
slimbus
driver core: platform: use generic driver_override infrastructure
2026-03-17 20:30:57 +01:00
soc
Merge tag 'driver-core-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
2026-04-13 19:03:11 -07:00
soundwire
soundwire: debugfs: initialize firmware_file to empty string
2026-04-02 16:15:23 +02:00
spi
Merge tag 'driver-core-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
2026-04-13 19:03:11 -07:00
spmi
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
ssb
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
staging
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-03-19 14:16:00 -07:00
target
Merge tag 'for-7.1/block-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2026-04-13 15:51:31 -07:00
tc
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
tee
tee: shm: Remove refcounting of kernel pages
2026-03-03 09:03:04 +01:00
thermal
Merge tag 'bitmap-for-v7.1' of https://github.com/norov/linux
2026-04-14 08:55:18 -07:00
thunderbolt
thunderbolt: Fix property read in nhi_wake_supported()
2026-03-09 12:36:54 +01:00
tty
Merge tag 'pwrseq-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-13 20:28:22 -07:00
ufs
scsi: ufs: core: Fix SError in ufshcd_rtc_work() during UFS suspend
2026-03-07 11:08:39 -05:00
uio
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
usb
usb: typec: ucsi: skip connector validation before init
2026-04-07 13:35:44 +02:00
vdpa
vdpa: use generic driver_override infrastructure
2026-04-04 00:47:50 +02:00
vfio
Merge tag 'powerpc-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2026-04-14 17:10:15 -07:00
vhost
vhost_net: fix sleeping with preempt-disabled in vhost_net_busy_poll()
2026-04-23 11:53:31 -07:00
video
fbdev: au1100fb: Fix build on MIPS64
2026-03-05 17:35:12 +01:00
virt
Merge tag 'x86_tdx_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 14:42:55 -07:00
virtio
dma-mapping: Clarify valid conditions for CPU cache line overlap
2026-03-20 11:33:24 +01:00
w1
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
watchdog
watchdog: ni903x_wdt: Convert to a platform driver
2026-04-07 21:06:59 +02:00
xen
Merge tag 'acpi-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2026-04-13 19:25:07 -07:00
zorro
Convert 'alloc_flex' family to use the new default GFP_KERNEL argument
2026-02-21 17:09:51 -08:00
Kconfig
…
Makefile
phy: enter drivers/phy/Makefile even without CONFIG_GENERIC_PHY
2026-02-04 20:45:26 +05:30