fkie_cve-2025-39956
Vulnerability from fkie_nvd
Published
2025-10-09 10:15
Modified
2025-10-09 15:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: igc: don't fail igc_probe() on LED setup error When igc_led_setup() fails, igc_probe() fails and triggers kernel panic in free_netdev() since unregister_netdev() is not called. [1] This behavior can be tested using fault-injection framework, especially the failslab feature. [2] Since LED support is not mandatory, treat LED setup failures as non-fatal and continue probe with a warning message, consequently avoiding the kernel panic. [1] kernel BUG at net/core/dev.c:12047! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 0 UID: 0 PID: 937 Comm: repro-igc-led-e Not tainted 6.17.0-rc4-enjuk-tnguy-00865-gc4940196ab02 #64 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:free_netdev+0x278/0x2b0 [...] Call Trace: <TASK> igc_probe+0x370/0x910 local_pci_probe+0x3a/0x80 pci_device_probe+0xd1/0x200 [...] [2] #!/bin/bash -ex FAILSLAB_PATH=/sys/kernel/debug/failslab/ DEVICE=0000:00:05.0 START_ADDR=$(grep " igc_led_setup" /proc/kallsyms \ | awk '{printf("0x%s", $1)}') END_ADDR=$(printf "0x%x" $((START_ADDR + 0x100))) echo $START_ADDR > $FAILSLAB_PATH/require-start echo $END_ADDR > $FAILSLAB_PATH/require-end echo 1 > $FAILSLAB_PATH/times echo 100 > $FAILSLAB_PATH/probability echo N > $FAILSLAB_PATH/ignore-gfp-wait echo $DEVICE > /sys/bus/pci/drivers/igc/bind
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/528eb4e19ec0df30d0c9ae4074ce945667dde919
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bec504867acc7315de9cd96ef9161fa52a25abe8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f05e82d8553232cef150a6dbb70ed67d162abb2b
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nigc: don\u0027t fail igc_probe() on LED setup error\n\nWhen igc_led_setup() fails, igc_probe() fails and triggers kernel panic\nin free_netdev() since unregister_netdev() is not called. [1]\nThis behavior can be tested using fault-injection framework, especially\nthe failslab feature. [2]\n\nSince LED support is not mandatory, treat LED setup failures as\nnon-fatal and continue probe with a warning message, consequently\navoiding the kernel panic.\n\n[1]\n kernel BUG at net/core/dev.c:12047!\n Oops: invalid opcode: 0000 [#1] SMP NOPTI\n CPU: 0 UID: 0 PID: 937 Comm: repro-igc-led-e Not tainted 6.17.0-rc4-enjuk-tnguy-00865-gc4940196ab02 #64 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n RIP: 0010:free_netdev+0x278/0x2b0\n [...]\n Call Trace:\n  \u003cTASK\u003e\n  igc_probe+0x370/0x910\n  local_pci_probe+0x3a/0x80\n  pci_device_probe+0xd1/0x200\n [...]\n\n[2]\n #!/bin/bash -ex\n\n FAILSLAB_PATH=/sys/kernel/debug/failslab/\n DEVICE=0000:00:05.0\n START_ADDR=$(grep \" igc_led_setup\" /proc/kallsyms \\\n         | awk \u0027{printf(\"0x%s\", $1)}\u0027)\n END_ADDR=$(printf \"0x%x\" $((START_ADDR + 0x100)))\n\n echo $START_ADDR \u003e $FAILSLAB_PATH/require-start\n echo $END_ADDR \u003e $FAILSLAB_PATH/require-end\n echo 1 \u003e $FAILSLAB_PATH/times\n echo 100 \u003e $FAILSLAB_PATH/probability\n echo N \u003e $FAILSLAB_PATH/ignore-gfp-wait\n\n echo $DEVICE \u003e /sys/bus/pci/drivers/igc/bind"
    }
  ],
  "id": "CVE-2025-39956",
  "lastModified": "2025-10-09T15:50:04.013",
  "metrics": {},
  "published": "2025-10-09T10:15:36.813",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/528eb4e19ec0df30d0c9ae4074ce945667dde919"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bec504867acc7315de9cd96ef9161fa52a25abe8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f05e82d8553232cef150a6dbb70ed67d162abb2b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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