WSL2-Linux-Kernel/drivers/misc
Shunsuke Mie 8e30538eca misc: pci_endpoint_test: Fix pci_endpoint_test_{copy,write,read}() panic
The dma_map_single() doesn't permit zero length mapping. It causes a follow
panic.

A panic was reported on arm64:

[   60.137988] ------------[ cut here ]------------
[   60.142630] kernel BUG at kernel/dma/swiotlb.c:624!
[   60.147508] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[   60.152992] Modules linked in: dw_hdmi_cec crct10dif_ce simple_bridge rcar_fdp1 vsp1 rcar_vin videobuf2_vmalloc rcar_csi2 v4l
2_mem2mem videobuf2_dma_contig videobuf2_memops pci_endpoint_test videobuf2_v4l2 videobuf2_common rcar_fcp v4l2_fwnode v4l2_asyn
c videodev mc gpio_bd9571mwv max9611 pwm_rcar ccree at24 authenc libdes phy_rcar_gen3_usb3 usb_dmac display_connector pwm_bl
[   60.186252] CPU: 0 PID: 508 Comm: pcitest Not tainted 6.0.0-rc1rpci-dev+ #237
[   60.193387] Hardware name: Renesas Salvator-X 2nd version board based on r8a77951 (DT)
[   60.201302] pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   60.208263] pc : swiotlb_tbl_map_single+0x2c0/0x590
[   60.213149] lr : swiotlb_map+0x88/0x1f0
[   60.216982] sp : ffff80000a883bc0
[   60.220292] x29: ffff80000a883bc0 x28: 0000000000000000 x27: 0000000000000000
[   60.227430] x26: 0000000000000000 x25: ffff0004c0da20d0 x24: ffff80000a1f77c0
[   60.234567] x23: 0000000000000002 x22: 0001000040000010 x21: 000000007a000000
[   60.241703] x20: 0000000000200000 x19: 0000000000000000 x18: 0000000000000000
[   60.248840] x17: 0000000000000000 x16: 0000000000000000 x15: ffff0006ff7b9180
[   60.255977] x14: ffff0006ff7b9180 x13: 0000000000000000 x12: 0000000000000000
[   60.263113] x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
[   60.270249] x8 : 0001000000000010 x7 : ffff0004c6754b20 x6 : 0000000000000000
[   60.277385] x5 : ffff0004c0da2090 x4 : 0000000000000000 x3 : 0000000000000001
[   60.284521] x2 : 0000000040000000 x1 : 0000000000000000 x0 : 0000000040000010
[   60.291658] Call trace:
[   60.294100]  swiotlb_tbl_map_single+0x2c0/0x590
[   60.298629]  swiotlb_map+0x88/0x1f0
[   60.302115]  dma_map_page_attrs+0x188/0x230
[   60.306299]  pci_endpoint_test_ioctl+0x5e4/0xd90 [pci_endpoint_test]
[   60.312660]  __arm64_sys_ioctl+0xa8/0xf0
[   60.316583]  invoke_syscall+0x44/0x108
[   60.320334]  el0_svc_common.constprop.0+0xcc/0xf0
[   60.325038]  do_el0_svc+0x2c/0xb8
[   60.328351]  el0_svc+0x2c/0x88
[   60.331406]  el0t_64_sync_handler+0xb8/0xc0
[   60.335587]  el0t_64_sync+0x18c/0x190
[   60.339251] Code: 52800013 d2e00414 35fff45c d503201f (d4210000)
[   60.345344] ---[ end trace 0000000000000000 ]---

To fix it, this patch adds a checking the payload length if it is zero.

Fixes: 343dc693f7 ("misc: pci_endpoint_test: Prevent some integer overflows")
Cc: stable <stable@kernel.org>
Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
Link: https://lore.kernel.org/r/20220907020100.122588-2-mie@igel.co.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-09-09 10:24:12 +02:00
..
altera-stapl misc: move from strlcpy with unused retval to strscpy 2022-09-01 16:29:42 +02:00
bcm-vk misc: bcm_vk: Remove usage of deprecated functions 2022-09-01 16:29:32 +02:00
c2port misc: c2port: core: Make copying name from userspace more secure 2020-11-03 10:12:10 +01:00
cardreader Merge 5.19-rc6 into char-misc-next 2022-07-11 08:32:58 +02:00
cb710 cb710: avoid NULL pointer subtraction 2021-10-05 15:50:05 +02:00
cxl cxl: Fix a memory leak in an error handling path 2022-07-14 16:53:52 +02:00
echo char: Replace HTTP links with HTTPS ones 2020-07-23 09:44:15 +02:00
eeprom misc: move from strlcpy with unused retval to strscpy 2022-09-01 16:29:42 +02:00
genwqe Merge 5.15-rc3 into char-misc next 2021-09-27 15:39:40 +02:00
habanalabs habanalabs: move h/w dirty message to debug 2022-07-12 09:09:31 +03:00
ibmasm Char / Misc driver updates for 5.14-rc1 2021-07-05 13:42:16 -07:00
lis3lv02d spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
lkdtm Char / Misc driver changes for 6.0-rc1 2022-08-04 11:05:48 -07:00
mchp_pci1xxxx misc: microchip: pci1xxxx: use module_auxiliary_driver 2022-09-09 10:03:13 +02:00
mei misc: move from strlcpy with unused retval to strscpy 2022-09-01 16:29:42 +02:00
ocxl misc: ocxl: fix possible refcount leak in afu_ioctl() 2022-09-01 16:29:50 +02:00
pvpanic misc/pvpanic: Convert regular spinlock into trylock on panic path 2022-04-29 16:54:59 +02:00
sgi-gru misc: sgi-gru: grukservices: drop unexpected word "the" in the comments 2022-06-27 16:15:17 +02:00
sgi-xp sgi-xp: Use the bitmap API to allocate bitmaps 2022-07-08 15:41:39 +02:00
ti-st ti-st: use tty_write_room 2021-05-13 17:03:20 +02:00
uacce uacce: Handle parent device removal or parent driver module rmmod 2022-07-01 10:35:08 +02:00
vmw_vmci misc/vmw_vmci: Use kmap_local_page() in vmci_queue_pair.c 2022-09-09 10:22:32 +02:00
Kconfig misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO function in the multi-function endpoint of pci1xxxx device. 2022-09-02 14:49:05 +02:00
Makefile misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO function in the multi-function endpoint of pci1xxxx device. 2022-09-02 14:49:05 +02:00
ad525x_dpot-i2c.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot-spi.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
ad525x_dpot.c misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
ad525x_dpot.h misc: ad525x_dpot: Make ad_dpot_remove() return void 2021-10-13 14:35:37 +02:00
apds990x.c
apds9802als.c
atmel-ssc.c misc: update maintainer email address and description for atmel-ssc 2022-08-03 11:03:03 +02:00
bh1770glc.c
cs5535-mfgpt.c
ds1682.c
dummy-irq.c
dw-xdata-pcie.c misc: Add Synopsys DesignWare xData IP driver 2021-04-05 13:15:52 +02:00
enclosure.c misc: enclosure: replace snprintf in show functions with sysfs_emit 2021-10-22 11:25:39 +02:00
fastrpc.c Merge 6.0-rc4 into char-misc-next 2022-09-05 07:53:56 +02:00
gehc-achc.c misc: gehc: Add SPI ID table 2021-10-05 15:47:18 +02:00
hi6421v600-irq.c misc: hi6421-spmi-pmic: Use generic_handle_irq_safe(). 2022-03-02 22:28:50 +01:00
hisi_hikey_usb.c misc: hisi_hikey_usb: change the DT schema 2021-09-14 10:57:31 +02:00
hmc6352.c
hpilo.c misc: hpilo: map iLO shared memory by PCI revision id 2021-06-04 15:28:23 +02:00
hpilo.h misc: hpilo: map iLO shared memory by PCI revision id 2021-06-04 15:28:23 +02:00
ibmvmc.c vio: make remove callback return void 2021-03-02 22:41:23 +11:00
ibmvmc.h
ics932s401.c misc: move from strlcpy with unused retval to strscpy 2022-09-01 16:29:42 +02:00
isl29003.c misc: isl29003: Fix typo for get/set mode 2020-12-09 19:35:34 +01:00
isl29020.c
kgdbts.c kgdbts: fix return value of __setup handler 2022-03-18 14:17:56 +01:00
lattice-ecp3-config.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
open-dice.c misc: open-dice: Add driver to expose DICE data to userspace 2022-02-04 16:45:39 +01:00
pch_phub.c misc: pch_phub: Remove superfluous descriptions to non-existent args 'offset_address' 2020-07-01 15:05:37 +02:00
pci_endpoint_test.c misc: pci_endpoint_test: Fix pci_endpoint_test_{copy,write,read}() panic 2022-09-09 10:24:12 +02:00
phantom.c misc/phantom.c: use generic power management 2020-06-29 18:43:42 +02:00
qcom-coincell.c
sram-exec.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_320.RULE 2022-06-10 14:51:36 +02:00
sram.c misc: sram: Add compatible string for Tegra234 SYSRAM 2021-12-08 15:16:05 +01:00
sram.h misc: sram: Only map reserved areas in Tegra SYSRAM 2021-08-05 14:27:46 +02:00
tifm_7xx1.c tifm: Remove usage of the deprecated "pci-dma-compat.h" API 2021-09-21 17:33:31 +02:00
tifm_core.c tifm: Remove usage of the deprecated "pci-dma-compat.h" API 2021-09-21 17:33:31 +02:00
tsl2550.c
vcpu_stall_detector.c misc: Add a mechanism to detect stalls on guest vCPUs 2022-07-14 16:54:17 +02:00
vmw_balloon.c - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe 2022-08-05 16:32:45 -07:00
xilinx_sdfec.c misc/xilinx_sdfec: Replace kmap() with kmap_local_page() 2022-09-09 10:22:36 +02:00