CVE-2023-52877 Affecting dlm-kmp-default package, versions <6.4.0-150600.23.14.2

Note: Versions mentioned in the description apply only to the upstream dlm-kmp-default package and not the dlm-kmp-default package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

usb: typec: tcpm: Fix NULL pointer dereference in tcpm_pd_svdm()

It is possible that typec_register_partner() returns ERR_PTR on failure. When port->partner is an error, a NULL pointer dereference may occur as shown below.

[91222.095236][ T319] typec port0: failed to register partner (-17) ... [91225.061491][ T319] Unable to handle kernel NULL pointer dereference at virtual address 000000000000039f [91225.274642][ T319] pc : tcpm_pd_data_request+0x310/0x13fc [91225.274646][ T319] lr : tcpm_pd_data_request+0x298/0x13fc [91225.308067][ T319] Call trace: [91225.308070][ T319] tcpm_pd_data_request+0x310/0x13fc [91225.308073][ T319] tcpm_pd_rx_handler+0x100/0x9e8 [91225.355900][ T319] kthread_worker_fn+0x178/0x58c [91225.355902][ T319] kthread+0x150/0x200 [91225.355905][ T319] ret_from_fork+0x10/0x30

Add a check for port->partner to avoid dereferencing a NULL pointer.

• https://www.suse.com/security/cve/CVE-2023-52877.html
• https://bugzilla.suse.com/1224944
• https://git.kernel.org/stable/c/4987daf86c152ff882d51572d154ad12e4ff3a4b
• https://git.kernel.org/stable/c/9ee038590d808a95d16adf92818dcd4752273c08
• https://git.kernel.org/stable/c/b37a168c0137156042a0ca9626651b5a789e822b
• https://git.kernel.org/stable/c/e5f53a68a596e04df3fde3099273435a30b6fdac
• https://git.kernel.org/stable/c/e7a802447c491903aa7cb45967aa2a934a4e63fc