Description
In the Linux kernel, the following vulnerability has been resolved: mailbox: qcom-cpucp: handle NULL data in send_data callback mailbox_clear_channel() calls mbox_send_message() with NULL data to notify the remote side that the RX channel has been cleared. qcom_cpucp_mbox_send_data() blindly dereferenced the data pointer, causing a NULL pointer dereference kernel panic when invoked from this path under PREEMPT_RT. Add an explicit NULL check and return early without writing to the TX register, which is the correct behaviour for a channel-clear notification.
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
0e2a9a03106cd5fa0dbc9047675e7645c55e2669 to < 3d11d2a6c9a10de287e0f1b53a5e65d16afe2760affected0e2a9a03106cd5fa0dbc9047675e7645c55e2669 to < 413b0b94d6d06b8d49735280e86a01dac90cf177affected0e2a9a03106cd5fa0dbc9047675e7645c55e2669 to < b3d73e7440e0c40644285be1bda349cdf90122d8affected0e2a9a03106cd5fa0dbc9047675e7645c55e2669 to < fc4f2f99530298a1739226947aa76525142d421daffected
Linux Linux
Default version status: affected
6.11affected0 to < 6.11unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected