Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: sparx5: skip ptp deinit if init was skipped sparx5_ptp_init() returns early on the base lan969x variants because they do not have the SPX5_FEATURE_PTP flag. It also returns early when no "ptp" interrupt is described. Unbinding the driver then causes a NULL pointer dereference when cleaning up uninitialized tx_skbs queues: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 Call trace: skb_queue_purge_reason+0x68/0x120 (P) sparx5_ptp_deinit+0x64/0xc0 mchp_sparx5_remove+0x38/0x70 platform_remove+0x20/0x30 device_remove+0x4c/0x80 Before per-port tx_skbs were added, a NULL dereference would have happened when calling ptp_clock_unregister() on the never-registered PTP clocks. Fix by returning early in sparx5_ptp_deinit() if PTP is not used.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0933bd04047c3b96ba49545a8f91e7e6f8f666ff before 35c706d6eb1963735814c5f5bb2674a96eacf3cc; affected 0933bd04047c3b96ba49545a8f91e7e6f8f666ff before 2879b65bfa548e10d59c5fba91d17f8a00cd7029; affected 0933bd04047c3b96ba49545a8f91e7e6f8f666ff before 0d2c49915bc3aea4521cda5e4d42f24f63b94585 |
| Linux / Linux | affected 5.18; unaffected 0 before 5.18; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.