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| author | Zheyu Ma <zheyuma97@gmail.com> | 2022-03-02 15:24:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-08 21:12:46 +0300 |
| commit | ea372aab54903310756217d81610901a8e66cb7d (patch) | |
| tree | 2863a22d4b4a6b9f9b25e7f67f126461f5323846 /drivers/net/ethernet/intel/ixgbe | |
| parent | 1c09774e5ea10e970e3560e48124a893a8a52cf3 (diff) | |
| download | linux-ea372aab54903310756217d81610901a8e66cb7d.tar.xz | |
net: arcnet: com20020: Fix null-ptr-deref in com20020pci_probe()
commit bd6f1fd5d33dfe5d1b4f2502d3694a7cc13f166d upstream.
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: 8c14f9c70327 ("ARCNET: add com20020 PCI IDs with metadata")
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe')
0 files changed, 0 insertions, 0 deletions