CVE-2024-53224

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

RDMA/mlx5: Move events notifier registration to be after device registration

Move pkey change work initialization and cleanup from device resources

stage to notifier stage, since this is the stage which handles this work

events.

Fix a race between the device deregistration and pkey change work by moving

MLX5_IB_STAGE_DEVICE_NOTIFIER to be after MLX5_IB_STAGE_IB_REG in order to

ensure that the notifier is deregistered before the device during cleanup.

Which ensures there are no works that are being executed after the

device has already unregistered which can cause the panic below.

BUG: kernel NULL pointer dereference, address: 0000000000000000

PGD 0 P4D 0

Oops: 0000 [#1] PREEMPT SMP PTI

CPU: 1 PID: 630071 Comm: kworker/1:2 Kdump: loaded Tainted: G W OE --------- --- 5.14.0-162.6.1.el9_1.x86_64 #1

Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090008 02/27/2023

Workqueue: events pkey_change_handler [mlx5_ib]

RIP: 0010:setup_qp+0x38/0x1f0 [mlx5_ib]

Code: ee 41 54 45 31 e4 55 89 f5 53 48 89 fb 48 83 ec 20 8b 77 08 65 48 8b 04 25 28 00 00 00 48 89 44 24 18 48 8b 07 48 8d 4c 24 16 <4c> 8b 38 49 8b 87 80 0b 00 00 4c 89 ff 48 8b 80 08 05 00 00 8b 40

RSP: 0018:ffffbcc54068be20 EFLAGS: 00010282

RAX: 0000000000000000 RBX: ffff954054494128 RCX: ffffbcc54068be36

RDX: ffff954004934000 RSI: 0000000000000001 RDI: ffff954054494128

RBP: 0000000000000023 R08: ffff954001be2c20 R09: 0000000000000001

R10: ffff954001be2c20 R11: ffff9540260133c0 R12: 0000000000000000

R13: 0000000000000023 R14: 0000000000000000 R15: ffff9540ffcb0905

FS: 0000000000000000(0000) GS:ffff9540ffc80000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 0000000000000000 CR3: 000000010625c001 CR4: 00000000003706e0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Call Trace:

mlx5_ib_gsi_pkey_change+0x20/0x40 [mlx5_ib]

process_one_work+0x1e8/0x3c0

worker_thread+0x50/0x3b0

? rescuer_thread+0x380/0x380

kthread+0x149/0x170

? set_kthread_struct+0x50/0x50

ret_from_fork+0x22/0x30

Modules linked in: rdma_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_umad(OE) mlx5_ib(OE) mlx5_fwctl(OE) fwctl(OE) ib_uverbs(OE) mlx5_core(OE) mlxdevm(OE) ib_core(OE) mlx_compat(OE) psample mlxfw(OE) tls knem(OE) netconsole nfsv3 nfs_acl nfs lockd grace fscache netfs qrtr rfkill sunrpc intel_rapl_msr intel_rapl_common rapl hv_balloon hv_utils i2c_piix4 pcspkr joydev fuse ext4 mbcache jbd2 sr_mod sd_mod cdrom t10_pi sg ata_generic pci_hyperv pci_hyperv_intf hyperv_drm drm_shmem_helper drm_kms_helper hv_storvsc syscopyarea hv_netvsc sysfillrect sysimgblt hid_hyperv fb_sys_fops scsi_transport_fc hyperv_keyboard drm ata_piix crct10dif_pclmul crc32_pclmul crc32c_intel libata ghash_clmulni_intel hv_vmbus serio_raw [last unloaded: ib_core]

CR2: 0000000000000000

---[ end trace f6f8be4eae12f7bc ]---