Description
In the Linux kernel, the following vulnerability has been resolved: net: mdio: unexport __init-annotated mdio_bus_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the only in-tree call-site, drivers/net/phy/phy_device.c is never compiled as modular. (CONFIG_PHYLIB is boolean)
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < ab64ec2c75683f30ccde9eaaf0761002f901aa12affected90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < 5534bcd7c40299862237c4a8fd9c5031b3db1538affected90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < 6a90a44d53428a3bf01bd80df9ba78b19959270caffected90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < 7759c3222815b945a94b212bc0c6cdec475cfec2affected90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < 59fa94cddf9eef8d8dae587373eed8b8f4eb11d7affected90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3affected90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < f2f0f8c18b60ca64ff50892ed899cf1c77864755affected90eff9096c01ba90cdae504a6b95ee87fe2556a3 to < 35b42dce619701f1300fb8498dae82c9bb1f0263affected
Linux Linux
Default version status: affected
4.12affected0 to < 4.12unaffected4.14.283 to ≤ 4.14.*unaffected4.19.247 to ≤ 4.19.*unaffected5.4.198 to ≤ 5.4.*unaffected5.10.122 to ≤ 5.10.*unaffected5.15.47 to ≤ 5.15.*unaffected5.17.15 to ≤ 5.17.*unaffected5.18.4 to ≤ 5.18.*unaffected5.19 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ab64ec2c75683f30ccde9eaaf0761002f901aa12 ↗
- https://git.kernel.org/stable/c/5534bcd7c40299862237c4a8fd9c5031b3db1538 ↗
- https://git.kernel.org/stable/c/6a90a44d53428a3bf01bd80df9ba78b19959270c ↗
- https://git.kernel.org/stable/c/7759c3222815b945a94b212bc0c6cdec475cfec2 ↗
- https://git.kernel.org/stable/c/59fa94cddf9eef8d8dae587373eed8b8f4eb11d7 ↗
- https://git.kernel.org/stable/c/f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3 ↗
- https://git.kernel.org/stable/c/f2f0f8c18b60ca64ff50892ed899cf1c77864755 ↗
- https://git.kernel.org/stable/c/35b42dce619701f1300fb8498dae82c9bb1f0263 ↗