CVE: CVE-2024-53224
Published: 2024-12-27
Description: 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: [PII_REDACTED]
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: [PII_REDACTED] RBX: ffff[PII_REDACTED]28 RCX: ffffbcc54068be36
RDX: ffff[PII_REDACTED]00 RSI: [PII_REDACTED] RDI: ffff[PII_REDACTED]28
RBP: [PII_REDACTED] R08: ffff954001be2c20 R09: [PII_REDACTED]
R10: ffff954001be2c20 R11: ffff[PII_REDACTED]c0 R12: [PII_REDACTED]
R13: [PII_REDACTED] R14: [PII_REDACTED] R15: ffff9540ffcb0905
FS: [PII_REDACTED](0000) GS:ffff9540ffc80000(0000) knlGS:[PII_REDACTED]
CS: 0010 DS: 0000 ES: 0000 CR0: [PII_REDACTED]
CR2: [PII_REDACTED] CR3:[PII_REDACTED]25c001 CR4:[PII_REDACTED]3706e0
DR0: [PII_REDACTED] DR1: [PII_REDACTED] DR2: [PII_REDACTED]
DR3: [PII_REDACTED] DR6: 00000000fffe0ff0 DR7: [PII_REDACTED]
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: [PII_REDACTED]
---[ end trace f6f8be4eae12f7bc ]---
CVSS Score: 5.5 (MEDIUM)
CWE: CWE-476, CWE-476
References: https://git.kernel.org/stable/c/542bd62b7a7f37182c9ef192c2bd25d118c144e4; https://git.kernel.org/stable/c/6b0acf6a94c31efa43fce4edc22413a3390f9c05; https://git.kernel.org/stable/c/921fcf2971a1e8d3b904ba2c2905b96f4ec3d4ad