ghsa-2ggg-8w3g-3x2x
Vulnerability from github
Published
2024-12-27 15:31
Modified
2024-12-27 15:31
Details

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

LoongArch: Fix sleeping in atomic context for PREEMPT_RT

Commit bab1c299f3945ffe79 ("LoongArch: Fix sleeping in atomic context in setup_tlb_handler()") changes the gfp flag from GFP_KERNEL to GFP_ATOMIC for alloc_pages_node(). However, for PREEMPT_RT kernels we can still get a "sleeping in atomic context" error:

[ 0.372259] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 [ 0.372266] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1 [ 0.372268] preempt_count: 1, expected: 0 [ 0.372270] RCU nest depth: 1, expected: 1 [ 0.372272] 3 locks held by swapper/1/0: [ 0.372274] #0: 900000000c9f5e60 (&pcp->lock){+.+.}-{3:3}, at: get_page_from_freelist+0x524/0x1c60 [ 0.372294] #1: 90000000087013b8 (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x50/0x140 [ 0.372305] #2: 900000047fffd388 (&zone->lock){+.+.}-{3:3}, at: __rmqueue_pcplist+0x30c/0xea0 [ 0.372314] irq event stamp: 0 [ 0.372316] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 0.372322] hardirqs last disabled at (0): [<9000000005947320>] copy_process+0x9c0/0x26e0 [ 0.372329] softirqs last enabled at (0): [<9000000005947320>] copy_process+0x9c0/0x26e0 [ 0.372335] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 0.372341] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-rc7+ #1891 [ 0.372346] Hardware name: Loongson Loongson-3A5000-7A1000-1w-CRB/Loongson-LS3A5000-7A1000-1w-CRB, BIOS vUDK2018-LoongArch-V2.0.0-prebeta9 10/21/2022 [ 0.372349] Stack : 0000000000000089 9000000005a0db9c 90000000071519c8 9000000100388000 [ 0.372486] 900000010038b890 0000000000000000 900000010038b898 9000000007e53788 [ 0.372492] 900000000815bcc8 900000000815bcc0 900000010038b700 0000000000000001 [ 0.372498] 0000000000000001 4b031894b9d6b725 00000000055ec000 9000000100338fc0 [ 0.372503] 00000000000000c4 0000000000000001 000000000000002d 0000000000000003 [ 0.372509] 0000000000000030 0000000000000003 00000000055ec000 0000000000000003 [ 0.372515] 900000000806d000 9000000007e53788 00000000000000b0 0000000000000004 [ 0.372521] 0000000000000000 0000000000000000 900000000c9f5f10 0000000000000000 [ 0.372526] 90000000076f12d8 9000000007e53788 9000000005924778 0000000000000000 [ 0.372532] 00000000000000b0 0000000000000004 0000000000000000 0000000000070000 [ 0.372537] ... [ 0.372540] Call Trace: [ 0.372542] [<9000000005924778>] show_stack+0x38/0x180 [ 0.372548] [<90000000071519c4>] dump_stack_lvl+0x94/0xe4 [ 0.372555] [<900000000599b880>] __might_resched+0x1a0/0x260 [ 0.372561] [<90000000071675cc>] rt_spin_lock+0x4c/0x140 [ 0.372565] [<9000000005cbb768>] __rmqueue_pcplist+0x308/0xea0 [ 0.372570] [<9000000005cbed84>] get_page_from_freelist+0x564/0x1c60 [ 0.372575] [<9000000005cc0d98>] __alloc_pages_noprof+0x218/0x1820 [ 0.372580] [<900000000593b36c>] tlb_init+0x1ac/0x298 [ 0.372585] [<9000000005924b74>] per_cpu_trap_init+0x114/0x140 [ 0.372589] [<9000000005921964>] cpu_probe+0x4e4/0xa60 [ 0.372592] [<9000000005934874>] start_secondary+0x34/0xc0 [ 0.372599] [<900000000715615c>] smpboot_entry+0x64/0x6c

This is because in PREEMPT_RT kernels normal spinlocks are replaced by rt spinlocks and rt_spin_lock() will cause sleeping. Fix it by disabling NUMA optimization completely for PREEMPT_RT kernels.

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-56585"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-27T15:15:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Fix sleeping in atomic context for PREEMPT_RT\n\nCommit bab1c299f3945ffe79 (\"LoongArch: Fix sleeping in atomic context in\nsetup_tlb_handler()\") changes the gfp flag from GFP_KERNEL to GFP_ATOMIC\nfor alloc_pages_node(). However, for PREEMPT_RT kernels we can still get\na \"sleeping in atomic context\" error:\n\n[    0.372259] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\n[    0.372266] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1\n[    0.372268] preempt_count: 1, expected: 0\n[    0.372270] RCU nest depth: 1, expected: 1\n[    0.372272] 3 locks held by swapper/1/0:\n[    0.372274]  #0: 900000000c9f5e60 (\u0026pcp-\u003elock){+.+.}-{3:3}, at: get_page_from_freelist+0x524/0x1c60\n[    0.372294]  #1: 90000000087013b8 (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x50/0x140\n[    0.372305]  #2: 900000047fffd388 (\u0026zone-\u003elock){+.+.}-{3:3}, at: __rmqueue_pcplist+0x30c/0xea0\n[    0.372314] irq event stamp: 0\n[    0.372316] hardirqs last  enabled at (0): [\u003c0000000000000000\u003e] 0x0\n[    0.372322] hardirqs last disabled at (0): [\u003c9000000005947320\u003e] copy_process+0x9c0/0x26e0\n[    0.372329] softirqs last  enabled at (0): [\u003c9000000005947320\u003e] copy_process+0x9c0/0x26e0\n[    0.372335] softirqs last disabled at (0): [\u003c0000000000000000\u003e] 0x0\n[    0.372341] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-rc7+ #1891\n[    0.372346] Hardware name: Loongson Loongson-3A5000-7A1000-1w-CRB/Loongson-LS3A5000-7A1000-1w-CRB, BIOS vUDK2018-LoongArch-V2.0.0-prebeta9 10/21/2022\n[    0.372349] Stack : 0000000000000089 9000000005a0db9c 90000000071519c8 9000000100388000\n[    0.372486]         900000010038b890 0000000000000000 900000010038b898 9000000007e53788\n[    0.372492]         900000000815bcc8 900000000815bcc0 900000010038b700 0000000000000001\n[    0.372498]         0000000000000001 4b031894b9d6b725 00000000055ec000 9000000100338fc0\n[    0.372503]         00000000000000c4 0000000000000001 000000000000002d 0000000000000003\n[    0.372509]         0000000000000030 0000000000000003 00000000055ec000 0000000000000003\n[    0.372515]         900000000806d000 9000000007e53788 00000000000000b0 0000000000000004\n[    0.372521]         0000000000000000 0000000000000000 900000000c9f5f10 0000000000000000\n[    0.372526]         90000000076f12d8 9000000007e53788 9000000005924778 0000000000000000\n[    0.372532]         00000000000000b0 0000000000000004 0000000000000000 0000000000070000\n[    0.372537]         ...\n[    0.372540] Call Trace:\n[    0.372542] [\u003c9000000005924778\u003e] show_stack+0x38/0x180\n[    0.372548] [\u003c90000000071519c4\u003e] dump_stack_lvl+0x94/0xe4\n[    0.372555] [\u003c900000000599b880\u003e] __might_resched+0x1a0/0x260\n[    0.372561] [\u003c90000000071675cc\u003e] rt_spin_lock+0x4c/0x140\n[    0.372565] [\u003c9000000005cbb768\u003e] __rmqueue_pcplist+0x308/0xea0\n[    0.372570] [\u003c9000000005cbed84\u003e] get_page_from_freelist+0x564/0x1c60\n[    0.372575] [\u003c9000000005cc0d98\u003e] __alloc_pages_noprof+0x218/0x1820\n[    0.372580] [\u003c900000000593b36c\u003e] tlb_init+0x1ac/0x298\n[    0.372585] [\u003c9000000005924b74\u003e] per_cpu_trap_init+0x114/0x140\n[    0.372589] [\u003c9000000005921964\u003e] cpu_probe+0x4e4/0xa60\n[    0.372592] [\u003c9000000005934874\u003e] start_secondary+0x34/0xc0\n[    0.372599] [\u003c900000000715615c\u003e] smpboot_entry+0x64/0x6c\n\nThis is because in PREEMPT_RT kernels normal spinlocks are replaced by\nrt spinlocks and rt_spin_lock() will cause sleeping. Fix it by disabling\nNUMA optimization completely for PREEMPT_RT kernels.",
  "id": "GHSA-2ggg-8w3g-3x2x",
  "modified": "2024-12-27T15:31:54Z",
  "published": "2024-12-27T15:31:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56585"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08715b741f9b2a925d6485491e4907f3b29bac70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6575e0867bd478a5d7ef1783ca1e73160807d238"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88fd2b70120d52c1010257d36776876941375490"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c5f89458a2ea0800866b9fc690d3fa8367dc8f8d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.