fkie_cve-2023-53339
Vulnerability from fkie_nvd
Published
2025-09-17 15:15
Modified
2025-09-18 13:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix BUG_ON condition in btrfs_cancel_balance Pausing and canceling balance can race to interrupt balance lead to BUG_ON panic in btrfs_cancel_balance. The BUG_ON condition in btrfs_cancel_balance does not take this race scenario into account. However, the race condition has no other side effects. We can fix that. Reproducing it with panic trace like this: kernel BUG at fs/btrfs/volumes.c:4618! RIP: 0010:btrfs_cancel_balance+0x5cf/0x6a0 Call Trace: <TASK> ? do_nanosleep+0x60/0x120 ? hrtimer_nanosleep+0xb7/0x1a0 ? sched_core_clone_cookie+0x70/0x70 btrfs_ioctl_balance_ctl+0x55/0x70 btrfs_ioctl+0xa46/0xd20 __x64_sys_ioctl+0x7d/0xa0 do_syscall_64+0x38/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Race scenario as follows: > mutex_unlock(&fs_info->balance_mutex); > -------------------- > .......issue pause and cancel req in another thread > -------------------- > ret = __btrfs_balance(fs_info); > > mutex_lock(&fs_info->balance_mutex); > if (ret == -ECANCELED && atomic_read(&fs_info->balance_pause_req)) { > btrfs_info(fs_info, "balance: paused"); > btrfs_exclop_balance(fs_info, BTRFS_EXCLOP_BALANCE_PAUSED); > }
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29eefa6d0d07e185f7bfe9576f91e6dba98189c2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c93b89cd46636b5e74c12fa21dd86167bc6ea8d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0a462a0f20926918d6009f0b4b25673e883fc98
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae81329f7de3aa6f34ecdfa5412e72161a30e9ce
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b966e9e1e250dfdb41a7f41775faea4a37af923c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd7bef82ce0e929ef4cf63a34990545aaca28077
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ceb9ba8e30833a4823e2dc73f80ebcdf2498d01a
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\nbtrfs: fix BUG_ON condition in btrfs_cancel_balance\n\nPausing and canceling balance can race to interrupt balance lead to BUG_ON\npanic in btrfs_cancel_balance. The BUG_ON condition in btrfs_cancel_balance\ndoes not take this race scenario into account.\n\nHowever, the race condition has no other side effects. We can fix that.\n\nReproducing it with panic trace like this:\n\n  kernel BUG at fs/btrfs/volumes.c:4618!\n  RIP: 0010:btrfs_cancel_balance+0x5cf/0x6a0\n  Call Trace:\n   \u003cTASK\u003e\n   ? do_nanosleep+0x60/0x120\n   ? hrtimer_nanosleep+0xb7/0x1a0\n   ? sched_core_clone_cookie+0x70/0x70\n   btrfs_ioctl_balance_ctl+0x55/0x70\n   btrfs_ioctl+0xa46/0xd20\n   __x64_sys_ioctl+0x7d/0xa0\n   do_syscall_64+0x38/0x80\n   entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n  Race scenario as follows:\n  \u003e mutex_unlock(\u0026fs_info-\u003ebalance_mutex);\n  \u003e --------------------\n  \u003e .......issue pause and cancel req in another thread\n  \u003e --------------------\n  \u003e ret = __btrfs_balance(fs_info);\n  \u003e\n  \u003e mutex_lock(\u0026fs_info-\u003ebalance_mutex);\n  \u003e if (ret == -ECANCELED \u0026\u0026 atomic_read(\u0026fs_info-\u003ebalance_pause_req)) {\n  \u003e         btrfs_info(fs_info, \"balance: paused\");\n  \u003e         btrfs_exclop_balance(fs_info, BTRFS_EXCLOP_BALANCE_PAUSED);\n  \u003e }"
    }
  ],
  "id": "CVE-2023-53339",
  "lastModified": "2025-09-18T13:43:34.310",
  "metrics": {},
  "published": "2025-09-17T15:15:37.030",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29eefa6d0d07e185f7bfe9576f91e6dba98189c2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7c93b89cd46636b5e74c12fa21dd86167bc6ea8d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a0a462a0f20926918d6009f0b4b25673e883fc98"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ae81329f7de3aa6f34ecdfa5412e72161a30e9ce"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b966e9e1e250dfdb41a7f41775faea4a37af923c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd7bef82ce0e929ef4cf63a34990545aaca28077"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ceb9ba8e30833a4823e2dc73f80ebcdf2498d01a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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