Bug 2348153 (CVE-2022-49061)

Summary: CVE-2022-49061 kernel: net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
When using a fixed-link, the altr_tse_pcs driver crashes due to null-pointer dereference as no phy_device is provided to tse_pcs_fix_mac_speed function. Fix this by adding a check for phy_dev before calling the tse_pcs_fix_mac_speed() function.
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Description OSIDB Bzimport 2025-02-26 03:19:28 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link

When using a fixed-link, the altr_tse_pcs driver crashes
due to null-pointer dereference as no phy_device is provided to
tse_pcs_fix_mac_speed function. Fix this by adding a check for
phy_dev before calling the tse_pcs_fix_mac_speed() function.

Also clean up the tse_pcs_fix_mac_speed function a bit. There is
no need to check for splitter_base and sgmii_adapter_base
because the driver will fail if these 2 variables are not
derived from the device tree.
Comment 1 Avinash Hanwate 2025-02-26 14:04:40 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022653-CVE-2022-49061-01b6@gregkh/T
Comment 4 Avinash Hanwate 2025-02-27 17:14:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022653-CVE-2022-49061-01b6@gregkh/T