ghsa-hqfq-8fx5-m4r2
Vulnerability from github
Published
2025-09-16 15:32
Modified
2025-09-16 15:32
Details

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

mISDN: hfcpci: Fix warning when deleting uninitialized timer

With CONFIG_DEBUG_OBJECTS_TIMERS unloading hfcpci module leads to the following splat:

[ 250.215892] ODEBUG: assert_init not available (active state 0) object: ffffffffc01a3dc0 object type: timer_list hint: 0x0 [ 250.217520] WARNING: CPU: 0 PID: 233 at lib/debugobjects.c:612 debug_print_object+0x1b6/0x2c0 [ 250.218775] Modules linked in: hfcpci(-) mISDN_core [ 250.219537] CPU: 0 UID: 0 PID: 233 Comm: rmmod Not tainted 6.17.0-rc2-g6f713187ac98 #2 PREEMPT(voluntary) [ 250.220940] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 250.222377] RIP: 0010:debug_print_object+0x1b6/0x2c0 [ 250.223131] Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 41 56 48 8b 14 dd a0 4e 01 9f 48 89 ee 48 c7 c7 20 46 01 9f e8 cb 84d [ 250.225805] RSP: 0018:ffff888015ea7c08 EFLAGS: 00010286 [ 250.226608] RAX: 0000000000000000 RBX: 0000000000000005 RCX: ffffffff9be93a95 [ 250.227708] RDX: 1ffff1100d945138 RSI: 0000000000000008 RDI: ffff88806ca289c0 [ 250.228993] RBP: ffffffff9f014a00 R08: 0000000000000001 R09: ffffed1002bd4f39 [ 250.230043] R10: ffff888015ea79cf R11: 0000000000000001 R12: 0000000000000001 [ 250.231185] R13: ffffffff9eea0520 R14: 0000000000000000 R15: ffff888015ea7cc8 [ 250.232454] FS: 00007f3208f01540(0000) GS:ffff8880caf5a000(0000) knlGS:0000000000000000 [ 250.233851] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 250.234856] CR2: 00007f32090a7421 CR3: 0000000004d63000 CR4: 00000000000006f0 [ 250.236117] Call Trace: [ 250.236599] [ 250.236967] ? trace_irq_enable.constprop.0+0xd4/0x130 [ 250.237920] debug_object_assert_init+0x1f6/0x310 [ 250.238762] ? __pfx_debug_object_assert_init+0x10/0x10 [ 250.239658] ? __lock_acquire+0xdea/0x1c70 [ 250.240369] __try_to_del_timer_sync+0x69/0x140 [ 250.241172] ? __pfxtryto_del_timer_sync+0x10/0x10 [ 250.242058] ? timer_delete_sync+0xc6/0x120 [ 250.242842] ? lock_acquire+0x30/0x80 [ 250.243474] ? __timer_delete_sync+0xc6/0x120 [ 250.244262] __timer_delete_sync+0x98/0x120 [ 250.245015] HFC_cleanup+0x10/0x20 [hfcpci] [ 250.245704] __do_sys_delete_module+0x348/0x510 [ 250.246461] ? __pfx___do_sys_delete_module+0x10/0x10 [ 250.247338] do_syscall_64+0xc1/0x360 [ 250.247924] entry_SYSCALL_64_after_hwframe+0x77/0x7f

Fix this by initializing hfc_tl timer with DEFINE_TIMER macro. Also, use mod_timer instead of manual timeout update.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39833"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-16T14:15:51Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmISDN: hfcpci: Fix warning when deleting uninitialized timer\n\nWith CONFIG_DEBUG_OBJECTS_TIMERS unloading hfcpci module leads\nto the following splat:\n\n[  250.215892] ODEBUG: assert_init not available (active state 0) object: ffffffffc01a3dc0 object type: timer_list hint: 0x0\n[  250.217520] WARNING: CPU: 0 PID: 233 at lib/debugobjects.c:612 debug_print_object+0x1b6/0x2c0\n[  250.218775] Modules linked in: hfcpci(-) mISDN_core\n[  250.219537] CPU: 0 UID: 0 PID: 233 Comm: rmmod Not tainted 6.17.0-rc2-g6f713187ac98 #2 PREEMPT(voluntary)\n[  250.220940] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  250.222377] RIP: 0010:debug_print_object+0x1b6/0x2c0\n[  250.223131] Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 41 56 48 8b 14 dd a0 4e 01 9f 48 89 ee 48 c7 c7 20 46 01 9f e8 cb 84d\n[  250.225805] RSP: 0018:ffff888015ea7c08 EFLAGS: 00010286\n[  250.226608] RAX: 0000000000000000 RBX: 0000000000000005 RCX: ffffffff9be93a95\n[  250.227708] RDX: 1ffff1100d945138 RSI: 0000000000000008 RDI: ffff88806ca289c0\n[  250.228993] RBP: ffffffff9f014a00 R08: 0000000000000001 R09: ffffed1002bd4f39\n[  250.230043] R10: ffff888015ea79cf R11: 0000000000000001 R12: 0000000000000001\n[  250.231185] R13: ffffffff9eea0520 R14: 0000000000000000 R15: ffff888015ea7cc8\n[  250.232454] FS:  00007f3208f01540(0000) GS:ffff8880caf5a000(0000) knlGS:0000000000000000\n[  250.233851] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  250.234856] CR2: 00007f32090a7421 CR3: 0000000004d63000 CR4: 00000000000006f0\n[  250.236117] Call Trace:\n[  250.236599]  \u003cTASK\u003e\n[  250.236967]  ? trace_irq_enable.constprop.0+0xd4/0x130\n[  250.237920]  debug_object_assert_init+0x1f6/0x310\n[  250.238762]  ? __pfx_debug_object_assert_init+0x10/0x10\n[  250.239658]  ? __lock_acquire+0xdea/0x1c70\n[  250.240369]  __try_to_del_timer_sync+0x69/0x140\n[  250.241172]  ? __pfx___try_to_del_timer_sync+0x10/0x10\n[  250.242058]  ? __timer_delete_sync+0xc6/0x120\n[  250.242842]  ? lock_acquire+0x30/0x80\n[  250.243474]  ? __timer_delete_sync+0xc6/0x120\n[  250.244262]  __timer_delete_sync+0x98/0x120\n[  250.245015]  HFC_cleanup+0x10/0x20 [hfcpci]\n[  250.245704]  __do_sys_delete_module+0x348/0x510\n[  250.246461]  ? __pfx___do_sys_delete_module+0x10/0x10\n[  250.247338]  do_syscall_64+0xc1/0x360\n[  250.247924]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFix this by initializing hfc_tl timer with DEFINE_TIMER macro.\nAlso, use mod_timer instead of manual timeout update.",
  "id": "GHSA-hqfq-8fx5-m4r2",
  "modified": "2025-09-16T15:32:36Z",
  "published": "2025-09-16T15:32:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39833"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43fc5da8133badf17f5df250ba03b9d882254845"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97766512a9951b9fd6fc97f1b93211642bb0b220"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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