CVE-2024-42224: net: dsa: mv88e6xxx: Correct check for empty list
First published: Tue Jul 30 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net: dsa: mv88e6xxx: Correct check for empty list Since commit a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO busses") mv88e6xxx_default_mdio_bus() has checked that the return value of list_first_entry() is non-NULL. This appears to be intended to guard against the list chip->mdios being empty. However, it is not the correct check as the implementation of list_first_entry is not designed to return NULL for empty lists. Instead, use list_first_entry_or_null() which does return NULL if the list is empty. Flagged by Smatch. Compile tested only.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=4.11<4.19.318 | |
| Linux Linux kernel | >=4.20<5.4.280 | |
| Linux Linux kernel | >=5.5<5.10.222 | |
| Linux Linux kernel | >=5.11<5.15.163 | |
| Linux Linux kernel | >=5.16<6.1.98 | |
| Linux Linux kernel | >=6.2<6.6.39 | |
| Linux Linux kernel | >=6.7<6.9.9 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 |
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Reference Links
- https://git.kernel.org/stable/c/2a2fe25a103cef73cde356e6d09da10f607e93f5
- https://git.kernel.org/stable/c/3bf8d70e1455f87856640c3433b3660a31001618
- https://git.kernel.org/stable/c/3f25b5f1635449036692a44b771f39f772190c1d
- https://git.kernel.org/stable/c/47d28dde172696031c880c5778633cdca30394ee
- https://git.kernel.org/stable/c/4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19b
- https://git.kernel.org/stable/c/8c2c3cca816d074c75a2801d1ca0dea7b0148114
- https://git.kernel.org/stable/c/aa03f591ef31ba603a4a99d05d25a0f21ab1cd89
- https://git.kernel.org/stable/c/f75625db838ade28f032dacd0f0c8baca42ecde4
- https://git.kernel.org/linus/4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19b
- https://security-tracker.debian.org/tracker/CVE-2024-42224
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-42224
- https://nvd.nist.gov/vuln/detail/CVE-2024-42224
- https://launchpad.net/bugs/cve/CVE-2024-42224
- https://ubuntu.com/security/CVE-2024-42224
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