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2d6ca8321c
linux/drivers/net/arcnet
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Zheyu Ma bd6f1fd5d3 net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe() 
During driver initialization, the pointer of card info, i.e. the
variable 'ci' is required. However, the definition of
'com20020pci_id_table' reveals that this field is empty for some
devices, which will cause null pointer dereference when initializing
these devices.

The following log reveals it:

[    3.973806] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
[    3.973819] RIP: 0010:com20020pci_probe+0x18d/0x13e0 [com20020_pci]
[    3.975181] Call Trace:
[    3.976208]  local_pci_probe+0x13f/0x210
[    3.977248]  pci_device_probe+0x34c/0x6d0
[    3.977255]  ? pci_uevent+0x470/0x470
[    3.978265]  really_probe+0x24c/0x8d0
[    3.978273]  __driver_probe_device+0x1b3/0x280
[    3.979288]  driver_probe_device+0x50/0x370

Fix this by checking whether the 'ci' is a null pointer first.

Fixes: 8c14f9c703 ("ARCNET: add com20020 PCI IDs with metadata")
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-03-03 10:29:13 +00:00
..
arc-rawmode.c
arc-rimi.c net: remove single-byte netdev->dev_addr writes 2021-10-13 10:03:59 -07:00
arcdevice.h net: remove single-byte netdev->dev_addr writes 2021-10-13 10:03:59 -07:00
arcnet.c arcnet: use new tasklet API 2021-02-02 15:51:17 -08:00
capmode.c arcnet: capmode: remove redundant assignment to pointer pkt 2019-08-30 14:14:46 -07:00
com90io.c net: remove single-byte netdev->dev_addr writes 2021-10-13 10:03:59 -07:00
com90xx.c net: remove single-byte netdev->dev_addr writes 2021-10-13 10:03:59 -07:00
com9026.h
com20020_cs.c net: remove single-byte netdev->dev_addr writes 2021-10-13 10:03:59 -07:00
com20020-isa.c net: remove single-byte netdev->dev_addr writes 2021-10-13 10:03:59 -07:00
com20020-pci.c net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe() 2022-03-03 10:29:13 +00:00
com20020.c net: remove single-byte netdev->dev_addr writes 2021-10-13 10:03:59 -07:00
com20020.h
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile
rfc1051.c
rfc1201.c