Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: initialize ptp_lock at probe time priv->ptp_lock is only initialized in stmmac_ptp_register(), which runs during __stmmac_open(). However, the lock is also used while the interface is down and has never been opened: tc_taprio_configure() invokes the PTP gettime64() callback to compute the EST base time when offloading a TAPRIO schedule, and stmmac_get_time() takes priv->ptp_lock. Using an uninitialized rwlock is undefined behaviour. Move the rwlock_init() to __stmmac_dvr_probe(), together with the other private locks, so that ptp_lock is always valid regardless of the interface state.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b60189e0392fa06348911077ef281eb2b1047b6a before ee33e424d4932c70f103b94a46b685923f236f65; affected b60189e0392fa06348911077ef281eb2b1047b6a before 7ced87834f3a58761d4bbcabf8326478548e6a54; affected b60189e0392fa06348911077ef281eb2b1047b6a before 79fb5bcc50996964e076dffbdc24b7d2c06bd957; affected b60189e0392fa06348911077ef281eb2b1047b6a before 420315413b29635de1d4ea4142e410e6465260f3; affected b60189e0392fa06348911077ef281eb2b1047b6a before 25cc0096efba83b4e0e6fa50f03e9543b41e9d3d; affected b60189e0392fa06348911077ef281eb2b1047b6a before b1986595cf827c38ff929e22fbc9ca8f76379306; affected b60189e0392fa06348911077ef281eb2b1047b6a before 0338c68e22abd2ee509ec2e32508a50896618c32 |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ee33e424d4932c70f103b94a46b685923f236f65
- https://git.kernel.org/stable/c/7ced87834f3a58761d4bbcabf8326478548e6a54
- https://git.kernel.org/stable/c/79fb5bcc50996964e076dffbdc24b7d2c06bd957
- https://git.kernel.org/stable/c/420315413b29635de1d4ea4142e410e6465260f3
- https://git.kernel.org/stable/c/25cc0096efba83b4e0e6fa50f03e9543b41e9d3d
- https://git.kernel.org/stable/c/b1986595cf827c38ff929e22fbc9ca8f76379306
- https://git.kernel.org/stable/c/0338c68e22abd2ee509ec2e32508a50896618c32