RDMA/cma: Allow UD qp_type to join multicast only(CVE-2023-53525)

概要

RDMA/cma: Allow UD qp_type to join multicast only

原文の説明

取得元が公開している説明をそのまま載せています (多くは英語)。

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

RDMA/cma: Allow UD qp_type to join multicast only

As for multicast:

The SIDR is the only mode that makes sense;
Besides PS_UDP, other port spaces like PS_IB is also allowed, as it is
UD compatible. In this case qkey also needs to be set [1].

This patch allows only UD qp_type to join multicast, and set qkey to
default if it's not set, to fix an uninit-value error: the ib->rec.qkey
field is accessed without being initialized.

=====================================================
BUG: KMSAN: uninit-value in cma_set_qkey drivers/infiniband/core/cma.c:510 [inline]
BUG: KMSAN: uninit-value in cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570
cma_set_qkey drivers/infiniband/core/cma.c:510 [inline]
cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570
cma_iboe_join_multicast drivers/infiniband/core/cma.c:4782 [inline]
rdma_join_multicast+0x2b83/0x30a0 drivers/infiniband/core/cma.c:4814
ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479
ucma_join_multicast+0x1e3/0x250 drivers/infiniband/core/ucma.c:1546
ucma_write+0x639/0x6d0 drivers/infiniband/core/ucma.c:1732
vfs_write+0x8ce/0x2030 fs/read_write.c:588
ksys_write+0x28c/0x520 fs/read_write.c:643
__do_sys_write fs/read_write.c:655 [inline]
__se_sys_write fs/read_write.c:652 [inline]
__ia32_sys_write+0xdb/0x120 fs/read_write.c:652
do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
__do_fast_syscall…

出典: OSV.dev (Open Source Vulnerabilities) NVD OSV

影響パッケージ

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"5.10.0"},{"fixed":"5.10.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.108"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.25"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.2.12"}]}]

ディストリビューション別の修正状況

各ディストリビューションが公開している、この CVE の修正パッケージ

Debian DEBIAN-CVE-2023-53525 linux 修正版: 5.10.178-1
Ubuntu UBUNTU-CVE-2023-53525 linux-hwe-edge

概要

原文の説明

影響パッケージ

ディストリビューション別の修正状況

参照URL