CVE-2024-42110

2024-07-3008:15:03

Linux

web.nvd.nist.gov

linux kernel

vulnerability

netif_rx

idxd

interrupt context

dmaengine drivers

AI Score

6.7

Confidence

High

EPSS

Percentile

16.2%

JSON

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

net: ntb_netdev: Move ntb_netdev_rx_handler() to call netif_rx() from __netif_rx()

The following is emitted when using idxd (DSA) dmanegine as the data
mover for ntb_transport that ntb_netdev uses.

[74412.546922] BUG: using smp_processor_id() in preemptible [00000000] code: irq/52-idxd-por/14526
[74412.556784] caller is netif_rx_internal+0x42/0x130
[74412.562282] CPU: 6 PID: 14526 Comm: irq/52-idxd-por Not tainted 6.9.5 #5
[74412.569870] Hardware name: Intel Corporation ArcherCity/ArcherCity, BIOS EGSDCRB1.E9I.1752.P05.2402080856 02/08/2024
[74412.581699] Call Trace:
[74412.584514] <TASK>
[74412.586933] dump_stack_lvl+0x55/0x70
[74412.591129] check_preemption_disabled+0xc8/0xf0
[74412.596374] netif_rx_internal+0x42/0x130
[74412.600957] __netif_rx+0x20/0xd0
[74412.604743] ntb_netdev_rx_handler+0x66/0x150 [ntb_netdev]
[74412.610985] ntb_complete_rxc+0xed/0x140 [ntb_transport]
[74412.617010] ntb_rx_copy_callback+0x53/0x80 [ntb_transport]
[74412.623332] idxd_dma_complete_txd+0xe3/0x160 [idxd]
[74412.628963] idxd_wq_thread+0x1a6/0x2b0 [idxd]
[74412.634046] irq_thread_fn+0x21/0x60
[74412.638134] ? irq_thread+0xa8/0x290
[74412.642218] irq_thread+0x1a0/0x290
[74412.646212] ? __pfx_irq_thread_fn+0x10/0x10
[74412.651071] ? __pfx_irq_thread_dtor+0x10/0x10
[74412.656117] ? __pfx_irq_thread+0x10/0x10
[74412.660686] kthread+0x100/0x130
[74412.664384] ? __pfx_kthread+0x10/0x10
[74412.668639] ret_from_fork+0x31/0x50
[74412.672716] ? __pfx_kthread+0x10/0x10
[74412.676978] ret_from_fork_asm+0x1a/0x30
[74412.681457] </TASK>

The cause is due to the idxd driver interrupt completion handler uses
threaded interrupt and the threaded handler is not hard or soft interrupt
context. However __netif_rx() can only be called from interrupt context.
Change the call to netif_rx() in order to allow completion via normal
context for dmaengine drivers that utilize threaded irq handling.

While the following commit changed from netif_rx() to __netif_rx(),
baebdf48c360 (“net: dev: Makes sure netif_rx() can be invoked in any context.”),
the change should’ve been a noop instead. However, the code precedes this
fix should’ve been using netif_rx_ni() or netif_rx_any_context().

Affected configurations

Vulners

Node

linuxlinux_kernelRange3.9–6.1.98

linuxlinux_kernelRange6.2.0–6.6.39

linuxlinux_kernelRange6.7.0–6.9.9

linuxlinux_kernelRange6.10.0≥

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ntb_netdev.c"
    ],
    "versions": [
      {
        "version": "548c237c0a99",
        "lessThan": "4b3b6c7efee6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "548c237c0a99",
        "lessThan": "e3af5b14e763",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "548c237c0a99",
        "lessThan": "858ae09f0367",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "548c237c0a99",
        "lessThan": "e15a5d821e51",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ntb_netdev.c"
    ],
    "versions": [
      {
        "version": "3.9",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.9",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.98",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.39",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.9",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]