Subject: CVE-2024-47735: RDMA/hns: Fix spin_unlock_irqrestore() called with IRQs enabled

From: Greg Kroah-Hartman <[email-masked]>

Description
===========

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

RDMA/hns: Fix spin_unlock_irqrestore() called with IRQs enabled

Fix missuse of spin_lock_irq()/spin_unlock_irq() when
spin_lock_irqsave()/spin_lock_irqrestore() was hold.

This was discovered through the lock debugging, and the corresponding
log is as follows:

raw_local_irq_restore() called with IRQs enabled
WARNING: CPU: 96 PID: 2074 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x30/0x40
...
Call trace:
 warn_bogus_irq_restore+0x30/0x40
 _raw_spin_unlock_irqrestore+0x84/0xc8
 add_qp_to_list+0x11c/0x148 [hns_roce_hw_v2]
 hns_roce_create_qp_common.constprop.0+0x240/0x780 [hns_roce_hw_v2]
 hns_roce_create_qp+0x98/0x160 [hns_roce_hw_v2]
 create_qp+0x138/0x258
 ib_create_qp_kernel+0x50/0xe8
 create_mad_qp+0xa8/0x128
 ib_mad_port_open+0x218/0x448
 ib_mad_init_device+0x70/0x1f8
 add_client_context+0xfc/0x220
 enable_device_and_get+0xd0/0x140
 ib_register_device.part.0+0xf4/0x1c8
 ib_register_device+0x34/0x50
 hns_roce_register_device+0x174/0x3d0 [hns_roce_hw_v2]
 hns_roce_init+0xfc/0x2c0 [hns_roce_hw_v2]
 __hns_roce_hw_v2_init_instance+0x7c/0x1d0 [hns_roce_hw_v2]
 hns_roce_hw_v2_init_instance+0x9c/0x180 [hns_roce_hw_v2]

The Linux kernel CVE team has assigned CVE-2024-47735 to this issue.

Affected and fixed versions
===========================

	Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 5.10.227 with commit 07f0f643d7e5
	Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 5.15.168 with commit 29c0f546d3fd
	Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.1.113 with commit 425589d4af09
	Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.6.54 with commit 094a1821903f
	Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.10.13 with commit 2656336a84fc
	Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.11.2 with commit a1a3403bb182
	Issue introduced in 4.9 with commit 9a4435375cd1 and fixed in 6.12-rc1 with commit 74d315b5af18

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2024-47735
will be updated if fixes are backported, please check that for the most
up to date information about this issue.

Affected files
==============

The file(s) affected by this issue are:
	drivers/infiniband/hw/hns/hns_roce_qp.c

Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/07f0f643d7e570dbe8ef6f5c3367a43e3086a335
	https://git.kernel.org/stable/c/29c0f546d3fd66238b42cf25bcd5f193bb1cf794
	https://git.kernel.org/stable/c/425589d4af09c49574bd71ac31f811362a5126c3
	https://git.kernel.org/stable/c/094a1821903f33fb91de4b71087773ee16aeb3a0
	https://git.kernel.org/stable/c/2656336a84fcb6802f6e6c233f4661891deea24f
	https://git.kernel.org/stable/c/a1a3403bb1826c8ec787f0d60c3e7b54f419129e
	https://git.kernel.org/stable/c/74d315b5af180220d561684d15897730135733a6