Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix memory leak in error path of hci_alloc_dev() Early failures in Bluetooth HCI UART configuration leak SRCU percpu memory. When device initialization fails before hci_register_dev() completes, the HCI_UNREGISTER flag is never set. As a result, when the device reference count reaches zero, bt_host_release() evaluates this flag as false and falls back to a direct kfree(hdev). Because hci_release_dev() is bypassed, the SRCU struct initialized early in hci_alloc_dev() is never cleaned up, resulting in a leak of percpu memory. Fix the leak by explicitly calling cleanup_srcu_struct() in the fallback (unregistered) branch of bt_host_release() before freeing the device.
Affected products
- Linux / Linux6.15.5 – 6.16
- Linux / Linux6.16 – 6.16
- Linux / Linux0 – 6.16
- Linux / Linux5.15.210 – 5.15.*
- Linux / Linux90dee0a0ff84fac8accd5be98412b3819f667149 – 5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd
- Linux / Linuxc56b177efce8b62798e4d96bdb9867106cb7c4a0 – c016118b9e51eeaf5bc93850d4c455a3b583c0aa
- Linux / Linuxbc0819a25e04cd68ef3568cfa51b63118fea39a7 – 0622e527a31d4b44737fed5c1a2ac1fc2cfb5184
- Linux / Linuxce23b73f0f27e2dbeb81734a79db710f05aa33c6 – bc2efe73c194a74839d7cf57b63880d97e21d309
- Linux / Linux1d6123102e9fbedc8d25bf4731da6d513173e49e – ce4b4cac3c5749b6aa75e62e2991ae2263f2f889
- Linux / Linux1d6123102e9fbedc8d25bf4731da6d513173e49e – f82799407a50af7bcacacf09cc9b279af8fe9b81
- Linux / Linux1d6123102e9fbedc8d25bf4731da6d513173e49e – 37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f
- Linux / Linuxdd4becd3fd4102696e1c15e6d260a1712a2d8685 – dd4becd3fd4102696e1c15e6d260a1712a2d8685
- Linux / Linux0e5c144c557df910ab64d9c25d06399a9a735e65 – 0e5c144c557df910ab64d9c25d06399a9a735e65
- Linux / Linux5.15.209 – 5.15.210
- Linux / Linux6.1.167 – 6.1.176
- Linux / Linux6.6.97 – 6.6.143
- Linux / Linux6.12.36 – 6.12.94
- Linux / Linux5.10.259 – 5.11
- Linux / Linux6.1.176 – 6.1.*
- Linux / Linux6.6.143 – 6.6.*
- Linux / Linux6.12.94 – 6.12.*
- Linux / Linux6.18.36 – 6.18.*
- Linux / Linux7.0.13 – 7.0.*
- Linux / Linux7.1 – *
References
- MISChttps://git.kernel.org/stable/c/5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd
- MISChttps://git.kernel.org/stable/c/c016118b9e51eeaf5bc93850d4c455a3b583c0aa
- MISChttps://git.kernel.org/stable/c/0622e527a31d4b44737fed5c1a2ac1fc2cfb5184
- MISChttps://git.kernel.org/stable/c/bc2efe73c194a74839d7cf57b63880d97e21d309
- MISChttps://git.kernel.org/stable/c/ce4b4cac3c5749b6aa75e62e2991ae2263f2f889
- MISChttps://git.kernel.org/stable/c/f82799407a50af7bcacacf09cc9b279af8fe9b81
- MISChttps://git.kernel.org/stable/c/37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f