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Xuan Zhuo 5c37711d9f virtio-net: fix for unable to handle page fault for address 
In merge mode, when xdp is enabled, if the headroom of buf is smaller
than virtnet_get_headroom(), xdp_linearize_page() will be called but the
variable of "headroom" is still 0, which leads to wrong logic after
entering page_to_skb().

[   16.600944] BUG: unable to handle page fault for address: ffffecbfff7b43c8[   16.602175] #PF: supervisor read access in kernel mode
[   16.603350] #PF: error_code(0x0000) - not-present page
[   16.604200] PGD 0 P4D 0
[   16.604686] Oops: 0000 [#1] SMP PTI
[   16.605306] CPU: 4 PID: 715 Comm: sh Tainted: G    B             5.12.0+ #312
[   16.606429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/04
[   16.608217] RIP: 0010:unmap_page_range+0x947/0xde0
[   16.609014] Code: 00 00 08 00 48 83 f8 01 45 19 e4 41 f7 d4 41 83 e4 03 e9 a4 fd ff ff e8 b7 63 ed ff 4c 89 e0 48 c1 e0 065
[   16.611863] RSP: 0018:ffffc90002503c58 EFLAGS: 00010286
[   16.612720] RAX: ffffecbfff7b43c0 RBX: 00007f19f7203000 RCX: ffffffff812ff359
[   16.613853] RDX: ffff888107778000 RSI: 0000000000000000 RDI: 0000000000000005
[   16.614976] RBP: ffffea000425e000 R08: 0000000000000000 R09: 3030303030303030
[   16.616124] R10: ffffffff82ed7d94 R11: 6637303030302052 R12: 7c00000afffded0f
[   16.617276] R13: 0000000000000001 R14: ffff888119ee7010 R15: 00007f19f7202000
[   16.618423] FS:  0000000000000000(0000) GS:ffff88842fd00000(0000) knlGS:0000000000000000
[   16.619738] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   16.620670] CR2: ffffecbfff7b43c8 CR3: 0000000103220005 CR4: 0000000000370ee0
[   16.621792] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   16.622920] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   16.624047] Call Trace:
[   16.624525]  ? release_pages+0x24d/0x730
[   16.625209]  unmap_single_vma+0xa9/0x130
[   16.625885]  unmap_vmas+0x76/0xf0
[   16.626480]  exit_mmap+0xa0/0x210
[   16.627129]  mmput+0x67/0x180
[   16.627673]  do_exit+0x3d1/0xf10
[   16.628259]  ? do_user_addr_fault+0x231/0x840
[   16.629000]  do_group_exit+0x53/0xd0
[   16.629631]  __x64_sys_exit_group+0x1d/0x20
[   16.630354]  do_syscall_64+0x3c/0x80
[   16.630988]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   16.631828] RIP: 0033:0x7f1a043d0191
[   16.632464] Code: Unable to access opcode bytes at RIP 0x7f1a043d0167.
[   16.633502] RSP: 002b:00007ffe3d993308 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   16.634737] RAX: ffffffffffffffda RBX: 00007f1a044c9490 RCX: 00007f1a043d0191
[   16.635857] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
[   16.636986] RBP: 0000000000000000 R08: ffffffffffffff88 R09: 0000000000000001
[   16.638120] R10: 0000000000000008 R11: 0000000000000246 R12: 00007f1a044c9490
[   16.639245] R13: 0000000000000001 R14: 00007f1a044c9968 R15: 0000000000000000
[   16.640408] Modules linked in:
[   16.640958] CR2: ffffecbfff7b43c8
[   16.641557] ---[ end trace bc4891c6ce46354c ]---
[   16.642335] RIP: 0010:unmap_page_range+0x947/0xde0
[   16.643135] Code: 00 00 08 00 48 83 f8 01 45 19 e4 41 f7 d4 41 83 e4 03 e9 a4 fd ff ff e8 b7 63 ed ff 4c 89 e0 48 c1 e0 065
[   16.645983] RSP: 0018:ffffc90002503c58 EFLAGS: 00010286
[   16.646845] RAX: ffffecbfff7b43c0 RBX: 00007f19f7203000 RCX: ffffffff812ff359
[   16.647970] RDX: ffff888107778000 RSI: 0000000000000000 RDI: 0000000000000005
[   16.649091] RBP: ffffea000425e000 R08: 0000000000000000 R09: 3030303030303030
[   16.650250] R10: ffffffff82ed7d94 R11: 6637303030302052 R12: 7c00000afffded0f
[   16.651394] R13: 0000000000000001 R14: ffff888119ee7010 R15: 00007f19f7202000
[   16.652529] FS:  0000000000000000(0000) GS:ffff88842fd00000(0000) knlGS:0000000000000000
[   16.653887] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   16.654841] CR2: ffffecbfff7b43c8 CR3: 0000000103220005 CR4: 0000000000370ee0
[   16.655992] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   16.657150] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   16.658290] Kernel panic - not syncing: Fatal exception
[   16.659613] Kernel Offset: disabled
[   16.660234] ---[ end Kernel panic - not syncing: Fatal exception ]---

Fixes: fb32856b16ad ("virtio-net: page_to_skb() use build_skb when there's sufficient tailroom")
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-01 15:24:11 -07:00
..
accessibility
TTY/Serial driver updates for 5.13-rc1
2021-04-26 11:20:10 -07:00
acpi
libnvdimm fixes for 5.13-rc2
2021-05-15 08:32:51 -07:00
amba
…
android
binder: Return EFAULT if we fail BINDER_ENABLE_ONEWAY_SPAM_DETECTION
2021-05-13 20:35:26 +02:00
ata
pci-v5.13-changes
2021-05-05 13:24:11 -07:00
atm
atm: firestream: Use fallthrough pseudo-keyword
2021-05-07 16:01:08 -07:00
auxdisplay
treewide: remove editor modelines and cruft
2021-05-07 00:26:34 -07:00
base
Driver core fixes for 5.13-rc2
2021-05-16 10:13:14 -07:00
bcma
bcma: remove unused function
2021-04-18 09:36:56 +03:00
block
block-5.13-2021-05-14
2021-05-15 08:52:30 -07:00
bluetooth
Networking changes for 5.13.
2021-04-29 11:57:23 -07:00
bus
ARM: SoC drivers for v5.13
2021-04-26 12:11:52 -07:00
cdrom
cdrom: gdrom: initialize global variable at init time
2021-05-13 18:58:44 +02:00
char
Char/misc driver fixes for 5.13-rc3
2021-05-20 06:31:52 -10:00
clk
clk: Skip clk provider registration when np is NULL
2021-05-11 08:47:25 +02:00
clocksource
clocksource/drivers/hyper-v: Re-enable VDSO_CLOCKMODE_HVCLOCK on X86
2021-05-14 14:55:13 +02:00
comedi
staging: comedi: move out of staging directory
2021-04-15 09:26:25 +02:00
connector
…
counter
…
cpufreq
Fix an idle CPU selection bug, and an AMD Ryzen maximum frequency enumeration bug.
2021-05-15 10:24:48 -07:00
cpuidle
…
crypto
Revert "crypto: cavium/nitrox - add an error message to explain the failure of pci_request_mem_regions"
2021-05-13 17:23:05 +02:00
cxl
cxl/mem: Fix memory device capacity probing
2021-04-16 18:21:56 -07:00
dax
…
dca
…
devfreq
…
dio
…
dma
dmaengine: qcom_hidma: comment platform_driver_register call
2021-05-13 18:32:29 +02:00
dma-buf
dma-buf: fix unintended pin/unpin warnings
2021-05-20 14:02:27 +02:00
edac
x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG
2021-05-10 07:51:38 +02:00
eisa
…
extcon
- Core Frameworks
2021-04-28 15:59:13 -07:00
firewire
The usual updates from the irq departement:
2021-04-26 09:43:16 -07:00
firmware
ARM: SoC fixes for 5.13
2021-05-20 14:46:26 -10:00
fpga
ARM: SoC drivers for v5.13
2021-04-26 12:11:52 -07:00
fsi
…
gnss
…
gpio
gpio: tegra186: Don't set parent IRQ affinity
2021-05-12 13:56:43 +02:00
gpu
drm fixes for 5.13-rc3
2021-05-20 20:15:43 -10:00
greybus
greybus: es2: fix kernel-doc warnings
2021-04-16 07:26:50 +02:00
hid
Merge branch 'for-5.13/warnings' into for-linus
2021-04-29 21:47:22 +02:00
hsi
HSI: core: fix resource leaks in hsi_add_client_from_dt()
2021-04-16 00:14:49 +02:00
hv
printk changes for 5.13
2021-04-27 18:09:44 -07:00
hwmon
Char/misc driver fixes for 5.13-rc3
2021-05-20 06:31:52 -10:00
hwspinlock
…
hwtracing
ARM:
2021-05-01 10:14:08 -07:00
i2c
Merge branch 'i2c/for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2021-04-30 13:01:02 -07:00
i3c
Revert "i3c master: fix missing destroy_workqueue() on error in i3c_master_register"
2021-04-24 22:21:01 +02:00
ide
…
idle
…
iio
iio: tsl2583: Fix division by a zero lux_val
2021-05-10 14:01:48 +01:00
infiniband
Networking fixes for 5.13-rc4, including fixes from bpf, netfilter,
2021-05-26 17:44:49 -10:00
input
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2021-05-06 23:37:55 -07:00
interconnect
CFI on arm64 series for v5.13-rc1
2021-04-27 10:16:46 -07:00
iommu
pci-v5.13-changes
2021-05-05 13:24:11 -07:00
ipack
…
irqchip
irqchip: Remove redundant error printing
2021-05-16 13:07:18 +01:00
isdn
Networking fixes for 5.13-rc4, including fixes from bpf, netfilter,
2021-05-26 17:44:49 -10:00
leds
leds: lp5523: check return value of lp5xx_read and jump to cleanup code
2021-05-13 17:30:15 +02:00
lightnvm
lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15
2021-04-13 09:16:12 -06:00
macintosh
macintosh/via-pmu: Fix build warning
2021-04-16 23:57:51 +10:00
mailbox
- qcom: enable support for SM8350 and SC7280
2021-04-28 16:10:33 -07:00
mcb
…
md
dm integrity: fix sparse warnings
2021-05-13 14:53:49 -04:00
media
media: gspca: properly check for errors in po1030_probe()
2021-05-13 18:58:32 +02:00
memory
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
memstick
memstick: r592: ignore kfifo_out() return code again
2021-04-26 11:08:23 +02:00
message
scsi: message: fusion: Remove unused local variable 'vtarget'
2021-04-13 01:39:12 -04:00
mfd
- Core Frameworks
2021-04-28 15:59:13 -07:00
misc
platform-drivers-x86 for v5.13-2
2021-05-20 06:40:20 -10:00
mmc
mmc: sdhci-pci-gli: increase 1.8V regulator wait
2021-05-10 14:39:06 +02:00
most
Staging/IIO driver updates for 5.13-rc1
2021-04-26 11:14:21 -07:00
mtd
mtd: parsers: ofpart: fix parsing subpartitions
2021-05-10 18:34:30 +02:00
mux
…
net
virtio-net: fix for unable to handle page fault for address
2021-06-01 15:24:11 -07:00
nfc
NFC: nfcmrvl: fix kernel-doc syntax in file headers
2021-05-23 17:26:38 -07:00
ntb
…
nubus
…
nvdimm
include: remove pagemap.h from blkdev.h
2021-05-06 19:24:11 -07:00
nvme
nvme-fc: clear q_live at beginning of association teardown
2021-05-19 08:40:24 +02:00
nvmem
…
of
of: overlay: Remove redundant assignment to ret
2021-05-03 13:57:56 -05:00
opp
…
parisc
…
parport
treewide: remove editor modelines and cruft
2021-05-07 00:26:34 -07:00
pci
more s390 updates for 5.13 merge window
2021-05-06 14:39:50 -07:00
pcmcia
…
perf
ARM:
2021-05-01 10:14:08 -07:00
phy
Networking changes for 5.13.
2021-04-29 11:57:23 -07:00
pinctrl
linux/kconfig.h: replace IF_ENABLED() with PTR_IF() in <linux/kernel.h>
2021-05-09 00:29:45 +09:00
platform
platform/x86: touchscreen_dmi: Add info for the Chuwi Hi10 Pro (CWI529) tablet
2021-05-20 14:11:03 +02:00
pnp
…
power
power supply and reset changes for the v5.13 series
2021-04-28 15:43:58 -07:00
powercap
…
pps
TTY/Serial driver updates for 5.13-rc1
2021-04-26 11:20:10 -07:00
ps3
…
ptp
ptp: ocp: Fix a resource leak in an error handling path
2021-05-12 14:06:33 -07:00
pwm
pwm: Changes for v5.13-rc1
2021-05-05 12:53:16 -07:00
rapidio
rapidio: handle create_workqueue() failure
2021-05-13 18:32:19 +02:00
ras
…
regulator
- Core Frameworks
2021-04-28 15:59:13 -07:00
remoteproc
remoteproc updates for v5.13
2021-05-04 11:13:33 -07:00
reset
pci-v5.13-changes
2021-05-05 13:24:11 -07:00
rpmsg
…
rtc
RTC for 5.13
2021-05-03 12:15:21 -07:00
s390
block-5.13-2021-05-07
2021-05-07 11:35:12 -07:00
sbus
…
scsi
SCSI fixes on 20210520
2021-05-20 14:41:35 -10:00
sh
The usual updates from the irq departement:
2021-04-26 09:43:16 -07:00
siox
…
slimbus
…
soc
IOMMU Updates for Linux v5.13
2021-05-01 09:33:00 -07:00
soundwire
…
spi
spi: sc18is602: implement .max_{transfer,message}_size() for the controller
2021-05-21 13:13:33 +01:00
spmi
…
ssb
…
staging
staging: rtl8723bs: avoid bogus gcc warning
2021-05-10 14:26:24 +02:00
target
SCSI misc on 20210508
2021-05-08 10:44:36 -07:00
tc
…
tee
AMD-TEE reference count loaded TAs
2021-05-17 16:06:02 +02:00
thermal
- Remove duplicate error message for the amlogic driver (Tang Bin)
2021-05-05 12:46:48 -07:00
thunderbolt
thunderbolt: Changes for v5.13 merge window
2021-04-13 12:17:14 +02:00
tty
Char/misc driver fixes for 5.13-rc3
2021-05-20 06:31:52 -10:00
uio
uio_hv_generic: Fix another memory leak in error handling paths
2021-05-14 13:26:04 +02:00
usb
Driver core fixes for 5.13-rc2
2021-05-16 10:13:14 -07:00
vdpa
{net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table
2021-05-18 23:01:48 -07:00
vfio
IOMMU Updates for Linux v5.13
2021-05-01 09:33:00 -07:00
vhost
virtio,vhost,vdpa: features, fixes
2021-05-05 13:31:39 -07:00
video
Char/misc driver fixes for 5.13-rc3
2021-05-20 06:31:52 -10:00
virt
nitro_enclaves: Fix stale file descriptors on failed usercopy
2021-04-29 19:06:49 +02:00
virtio
virtio_pci_modern: correct sparse tags for notify
2021-05-04 04:19:59 -04:00
visorbus
…
vlynq
…
vme
…
w1
…
watchdog
- Core Frameworks
2021-04-28 15:59:13 -07:00
xen
xen-pciback: reconfigure also from backend watch handler
2021-05-21 09:55:16 +02:00
zorro
…
Kconfig
staging: comedi: move out of staging directory
2021-04-15 09:26:25 +02:00
Makefile
virtio,vhost,vdpa: features, fixes
2021-05-05 13:31:39 -07:00