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Saeed Mirzamohammadi cc07057c7c video: fbdev: fix divide error in fbcon_switch 
This patch fixes the issue due to:

[   89.572883] divide_error: 0000 [#1] SMP KASAN PTI
[   89.572897] CPU: 3 PID: 16083 Comm: repro Not tainted 5.9.0-rc7.20200930.rc1.allarch-19-g3e32d0d.syzk #5
[   89.572902] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.5.1 01/01/2011
[   89.572934] RIP: 0010:cirrusfb_check_var+0x84/0x1260

The error happens when the pixels value is calculated before performing the sanity checks on bits_per_pixel.
A bits_per_pixel set to zero causes divide by zero error.

This patch moves the calculation after the sanity check.

Signed-off-by: Saeed Mirzamohammadi <saeed.mirzamohammadi@oracle.com>
Tested-by: Saeed Mirzamohammadi <saeed.mirzamohammadi@oracle.com>
Reviewed-by: Thomas Zimemrmann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201021235758.59993-1-saeed.mirzamohammadi@oracle.com
2020-10-23 08:47:30 +02:00
..
accessibility
Char/Misc driver fixes for 5.9-rc3
2020-08-26 10:50:50 -07:00
acpi
Merge branch 'acpi-mm'
2020-08-28 21:17:56 +02:00
amba
…
android
drivers: android: Fix the SPDX comment style
2020-07-29 17:05:44 +02:00
ata
libata-5.9-2020-09-04
2020-09-04 13:19:19 -07:00
atm
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-09-03 18:50:48 -07:00
auxdisplay
A trivial patch for auxdisplay:
2020-09-05 14:22:46 -07:00
base
Driver core fixes for 5.9-rc5
2020-09-13 09:02:59 -07:00
bcma
bcma: gpio: Use irqchip template
2020-08-02 18:26:51 +03:00
block
rbd: require global CAP_SYS_ADMIN for mapping and unmapping
2020-09-07 13:14:30 +02:00
bluetooth
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
2020-07-31 15:11:52 -07:00
bus
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
cdrom
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char
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2020-08-30 15:53:44 -07:00
clk
More ACPI updates for 5.9-rc1
2020-08-15 08:18:22 -07:00
clocksource
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
connector
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counter
counter: microchip-tcb-capture: check the correct variable
2020-08-22 11:38:42 +01:00
cpufreq
cpufreq: intel_pstate: Fix intel_pstate_get_hwp_max() for turbo disabled
2020-09-01 21:15:00 +02:00
cpuidle
cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic
2020-08-26 12:41:53 +02:00
crypto
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2020-08-30 15:53:44 -07:00
dax
libnvdimm fix for v5.9-rc5
2020-09-12 12:43:58 -07:00
dca
…
devfreq
PM / devfreq: Fix the wrong end with semicolon
2020-07-30 17:22:58 +09:00
dio
…
dma
dmaengine fixes for v5.9-rc4
2020-09-04 12:12:39 -07:00
dma-buf
dma-buf: Clarify that dma-buf sg lists are page aligned
2020-10-15 23:15:43 +02:00
edac
A fix to properly clear ghes_edac driver state on driver remove so that
2020-08-30 10:47:23 -07:00
eisa
…
extcon
…
firewire
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
firmware
Driver core fixes for 5.9-rc5
2020-09-13 09:02:59 -07:00
fpga
Linux 5.8-rc7
2020-07-27 11:49:37 +02:00
fsi
…
gnss
…
gpio
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
gpu
drm/ttm: remove overlapping memcpy support
2020-10-23 05:25:23 +10:00
greybus
greybus: Use fallthrough pseudo-keyword
2020-07-29 16:58:08 +02:00
hid
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
2020-09-02 12:55:46 -07:00
hsi
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
hv
hyperv-fixes for 5.9-rc3
2020-08-26 10:44:15 -07:00
hwmon
hwmon fixes for v5.9-rc3
2020-08-29 12:37:00 -07:00
hwspinlock
…
hwtracing
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
i2c
i2c: algo: pca: Reapply i2c bus settings after reset
2020-09-09 10:22:40 +02:00
i3c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
ide
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
idle
cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic
2020-08-26 12:41:53 +02:00
iio
Staging / IIO driver fixes for 5.9-rc5
2020-09-13 09:15:20 -07:00
infiniband
RDMA second 5.9-rc pull request
2020-09-11 10:02:36 -07:00
input
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
interconnect
interconnect: qcom: Fix small BW votes being truncated to zero
2020-09-04 00:07:12 +03:00
iommu
iommu/vt-d: Handle 36bit addressing for x86-32
2020-09-04 12:14:28 +02:00
ipack
…
irqchip
A set of fixes for interrupt chip drivers:
2020-08-30 11:56:54 -07:00
isdn
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
leds
LEDs changes for 5.9-rc1.
2020-08-05 19:24:27 -07:00
lightnvm
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
macintosh
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
mailbox
iomap: constify ioreadX() iomem argument (as in generic implementation)
2020-08-14 19:56:57 -07:00
mcb
…
md
dm thin metadata: Fix use-after-free in dm_bm_set_read_only
2020-09-02 13:38:40 -04:00
media
dma-buf: Use struct dma_buf_map in dma_buf_vunmap() interfaces
2020-09-29 12:41:21 +02:00
memory
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
memstick
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
message
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
mfd
- Bug Fixes
2020-08-28 10:15:33 -07:00
misc
dma-buf: Use struct dma_buf_map in dma_buf_vmap() interfaces
2020-09-29 12:40:58 +02:00
mmc
mmc: sdio: Use mmc_pre_req() / mmc_post_req()
2020-09-07 08:57:44 +02:00
most
drivers: most: add USB adapter driver
2020-07-31 14:38:12 +02:00
mtd
This pull request contains changes for JFFS2, UBI and UBIFS
2020-08-10 18:20:04 -07:00
mux
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
net
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-09-03 18:50:48 -07:00
nfc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-09-03 18:50:48 -07:00
ntb
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
nubus
…
nvdimm
libnvdimm: KASAN: global-out-of-bounds Read in internal_create_group
2020-08-17 14:47:38 -06:00
nvme
- Fix a regression in bdev partition locking (Christoph)
2020-09-11 11:55:28 -07:00
nvmem
nvmem: qcom-spmi-sdam: Enable multiple devices
2020-07-29 17:12:09 +02:00
of
of: address: Work around missing device_type property in pcie nodes
2020-08-19 16:30:57 -06:00
opp
Merge branch 'opp/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
2020-09-01 19:44:20 +02:00
oprofile
…
parisc
Merge branch 'parisc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
2020-08-12 12:41:15 -07:00
parport
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
pci
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
pcmcia
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
perf
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
phy
phy: fixes for 5.9
2020-09-04 12:41:55 +02:00
pinctrl
This is the bulk of the pin control changes for the v5.9
2020-08-09 12:52:28 -07:00
platform
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
pnp
…
power
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
powercap
powercap/intel_rapl: add support for AlderLake
2020-09-10 19:17:29 +02:00
pps
…
ps3
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
ptp
ptp: ptp_clockmatrix: use i2c_master_send for i2c write
2020-08-19 16:23:22 -07:00
pwm
pwm: Changes for v5.9-rc1
2020-08-14 16:00:09 -07:00
rapidio
rapidio: Replace 'select' DMAENGINES 'with depends on'
2020-09-05 19:52:54 +03:00
ras
…
regulator
regulator: Fixes for v5.9
2020-09-11 11:25:55 -07:00
remoteproc
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
reset
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
rpmsg
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
rtc
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
s390
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
sbus
…
scsi
SCSI fixes on 20200908
2020-09-08 11:42:58 -07:00
sfi
…
sh
iomap: constify ioreadX() iomem argument (as in generic implementation)
2020-08-14 19:56:57 -07:00
siox
…
slimbus
…
soc
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
soundwire
soundwire: fix double free of dangling pointer
2020-09-03 14:10:19 +05:30
spi
spi: Fixes for v5.9
2020-09-11 11:35:55 -07:00
spmi
…
ssb
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
staging
Staging / IIO driver fixes for 5.9-rc5
2020-09-13 09:15:20 -07:00
target
SCSI fixes on 20200908
2020-09-08 11:42:58 -07:00
tc
…
tee
…
thermal
- Fix bogus thermal shutdowns for omap4430 where bogus values
2020-09-04 12:49:03 -07:00
thunderbolt
thunderbolt: Fixes for v5.9-rc4
2020-09-01 09:48:28 +02:00
tty
TTY/Serial fixes for 5.9-rc3
2020-08-26 10:58:20 -07:00
uio
…
usb
USB-serial fixes for 5.9-rc5
2020-09-08 17:50:58 +02:00
vdpa
vdpa/mlx5: Avoid warnings about shifts on 32-bit platforms
2020-08-26 08:13:59 -04:00
vfio
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
vhost
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-09-03 18:50:48 -07:00
video
video: fbdev: fix divide error in fbcon_switch
2020-10-23 08:47:30 +02:00
virt
…
virtio
Merge branch 'virtio-shm' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse into drm-misc-next
2020-09-16 13:18:32 +02:00
visorbus
…
vlynq
…
vme
…
w1
…
watchdog
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
xen
xen: branch for v5.9-rc4
2020-09-06 09:59:27 -07:00
zorro
…
Kconfig
…
Makefile
…