Description
In the Linux kernel, the following vulnerability has been resolved: phy: mdio: fix memory leak Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic. MDIOBUS_ALLOCATED indicates 2 states: 1. Bus is only allocated 2. Bus allocated and __mdiobus_register() fails, but device_register() was called In case of device_register() has been called we should call put_device() to correctly free the memory allocated for this device, but mdiobus_free() calls just kfree(dev) in case of MDIOBUS_ALLOCATED state To avoid this behaviour we need to set bus->state to MDIOBUS_UNREGISTERED _before_ calling device_register(), because put_device() should be called even in case of device_register() failure.
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
46abc02175b3c246dd5141d878f565a8725060c9 to < 25e9f88c7e3cc35f5e3d3db199660d28a15df639affected46abc02175b3c246dd5141d878f565a8725060c9 to < 2250392d930bd0d989f24d355d6355b0150256e7affected46abc02175b3c246dd5141d878f565a8725060c9 to < f4f502a04ee1e543825af78f47eb7785015cd9f6affected46abc02175b3c246dd5141d878f565a8725060c9 to < 2397b9e118721292429fea8807a698e71b94795faffected46abc02175b3c246dd5141d878f565a8725060c9 to < 414bb4ead1362ef2c8592db723c017258f213988affected46abc02175b3c246dd5141d878f565a8725060c9 to < 0d2dd40a7be61b89a7c99dae8ee96389d27b413aaffected46abc02175b3c246dd5141d878f565a8725060c9 to < 064c2616234a7394867c924b5c1303974f3a4f4daffected46abc02175b3c246dd5141d878f565a8725060c9 to < ca6e11c337daf7925ff8a2aac8e84490a8691905affected
Linux Linux
Default version status: affected
2.6.28affected0 to < 2.6.28unaffected4.4.289 to ≤ 4.4.*unaffected4.9.287 to ≤ 4.9.*unaffected4.14.251 to ≤ 4.14.*unaffected4.19.211 to ≤ 4.19.*unaffected5.4.153 to ≤ 5.4.*unaffected5.10.73 to ≤ 5.10.*unaffected5.14.12 to ≤ 5.14.*unaffected5.15 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639 ↗
- https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7 ↗
- https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6 ↗
- https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f ↗
- https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988 ↗
- https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a ↗
- https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d ↗
- https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905 ↗