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CVE-2024-58089 (GCVE-0-2024-58089)

Vulnerability from cvelistv5 – Published: 2025-03-12 09:41 – Updated: 2026-08-05 11:47
VLAI
Title
btrfs: fix double accounting race when btrfs_run_delalloc_range() failed
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix double accounting race when btrfs_run_delalloc_range() failed [BUG] When running btrfs with block size (4K) smaller than page size (64K, aarch64), there is a very high chance to crash the kernel at generic/750, with the following messages: (before the call traces, there are 3 extra debug messages added) BTRFS warning (device dm-3): read-write for sector size 4096 with page size 65536 is experimental BTRFS info (device dm-3): checking UUID tree hrtimer: interrupt took 5451385 ns BTRFS error (device dm-3): cow_file_range failed, root=4957 inode=257 start=1605632 len=69632: -28 BTRFS error (device dm-3): run_delalloc_nocow failed, root=4957 inode=257 start=1605632 len=69632: -28 BTRFS error (device dm-3): failed to run delalloc range, root=4957 ino=257 folio=1572864 submit_bitmap=8-15 start=1605632 len=69632: -28 ------------[ cut here ]------------ WARNING: CPU: 2 PID: 3020984 at ordered-data.c:360 can_finish_ordered_extent+0x370/0x3b8 [btrfs] CPU: 2 UID: 0 PID: 3020984 Comm: kworker/u24:1 Tainted: G OE 6.13.0-rc1-custom+ #89 Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022 Workqueue: events_unbound btrfs_async_reclaim_data_space [btrfs] pc : can_finish_ordered_extent+0x370/0x3b8 [btrfs] lr : can_finish_ordered_extent+0x1ec/0x3b8 [btrfs] Call trace: can_finish_ordered_extent+0x370/0x3b8 [btrfs] (P) can_finish_ordered_extent+0x1ec/0x3b8 [btrfs] (L) btrfs_mark_ordered_io_finished+0x130/0x2b8 [btrfs] extent_writepage+0x10c/0x3b8 [btrfs] extent_write_cache_pages+0x21c/0x4e8 [btrfs] btrfs_writepages+0x94/0x160 [btrfs] do_writepages+0x74/0x190 filemap_fdatawrite_wbc+0x74/0xa0 start_delalloc_inodes+0x17c/0x3b0 [btrfs] btrfs_start_delalloc_roots+0x17c/0x288 [btrfs] shrink_delalloc+0x11c/0x280 [btrfs] flush_space+0x288/0x328 [btrfs] btrfs_async_reclaim_data_space+0x180/0x228 [btrfs] process_one_work+0x228/0x680 worker_thread+0x1bc/0x360 kthread+0x100/0x118 ret_from_fork+0x10/0x20 ---[ end trace 0000000000000000 ]--- BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1605632 OE len=16384 to_dec=16384 left=0 BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1622016 OE len=12288 to_dec=12288 left=0 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1634304 OE len=8192 to_dec=4096 left=0 CPU: 1 UID: 0 PID: 3286940 Comm: kworker/u24:3 Tainted: G W OE 6.13.0-rc1-custom+ #89 Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022 Workqueue: btrfs_work_helper [btrfs] (btrfs-endio-write) pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : process_one_work+0x110/0x680 lr : worker_thread+0x1bc/0x360 Call trace: process_one_work+0x110/0x680 (P) worker_thread+0x1bc/0x360 (L) worker_thread+0x1bc/0x360 kthread+0x100/0x118 ret_from_fork+0x10/0x20 Code: f84086a1 f9000fe1 53041c21 b9003361 (f9400661) ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Oops: Fatal exception SMP: stopping secondary CPUs SMP: failed to stop secondary CPUs 2-3 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: 0x275bb9540000 from 0xffff800080000000 PHYS_OFFSET: 0xffff8fbba0000000 CPU features: 0x100,00000070,00801250,8201720b [CAUSE] The above warning is triggered immediately after the delalloc range failure, this happens in the following sequence: - Range [1568K, 1636K) is dirty 1536K 1568K 1600K 1636K 1664K | |/////////|////////| | Where 1536K, 1600K and 1664K are page boundaries (64K page size) - Enter extent_writepage() for page 1536K - Enter run_delalloc_nocow() with locke ---truncated---
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:26 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d1051d6ebf8ef3517a5a3cf82bba8436d190f1c2 , < 21333148b5c9e52f41fafcedec3810b56a5e0e40 (git)
Affected: d1051d6ebf8ef3517a5a3cf82bba8436d190f1c2 , < 0283ee1912c8e243c931f4ee5b3672e954fe0384 (git)
Affected: d1051d6ebf8ef3517a5a3cf82bba8436d190f1c2 , < 72dad8e377afa50435940adfb697e070d3556670 (git)
Affected: eb124aaa2e85e9dceac37be5b7166a04b9b26735 (git)
Affected: 4.19.73 , < 4.20 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (semver)
Unaffected: 6.12.17 , ≤ 6.12.* (semver)
Unaffected: 6.13.5 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix double accounting race when btrfs_run_delalloc_range() failed\n\n[BUG]\nWhen running btrfs with block size (4K) smaller than page size (64K,\naarch64), there is a very high chance to crash the kernel at\ngeneric/750, with the following messages:\n(before the call traces, there are 3 extra debug messages added)\n\n  BTRFS warning (device dm-3): read-write for sector size 4096 with page size 65536 is experimental\n  BTRFS info (device dm-3): checking UUID tree\n  hrtimer: interrupt took 5451385 ns\n  BTRFS error (device dm-3): cow_file_range failed, root=4957 inode=257 start=1605632 len=69632: -28\n  BTRFS error (device dm-3): run_delalloc_nocow failed, root=4957 inode=257 start=1605632 len=69632: -28\n  BTRFS error (device dm-3): failed to run delalloc range, root=4957 ino=257 folio=1572864 submit_bitmap=8-15 start=1605632 len=69632: -28\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 3020984 at ordered-data.c:360 can_finish_ordered_extent+0x370/0x3b8 [btrfs]\n  CPU: 2 UID: 0 PID: 3020984 Comm: kworker/u24:1 Tainted: G           OE      6.13.0-rc1-custom+ #89\n  Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n  Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n  Workqueue: events_unbound btrfs_async_reclaim_data_space [btrfs]\n  pc : can_finish_ordered_extent+0x370/0x3b8 [btrfs]\n  lr : can_finish_ordered_extent+0x1ec/0x3b8 [btrfs]\n  Call trace:\n   can_finish_ordered_extent+0x370/0x3b8 [btrfs] (P)\n   can_finish_ordered_extent+0x1ec/0x3b8 [btrfs] (L)\n   btrfs_mark_ordered_io_finished+0x130/0x2b8 [btrfs]\n   extent_writepage+0x10c/0x3b8 [btrfs]\n   extent_write_cache_pages+0x21c/0x4e8 [btrfs]\n   btrfs_writepages+0x94/0x160 [btrfs]\n   do_writepages+0x74/0x190\n   filemap_fdatawrite_wbc+0x74/0xa0\n   start_delalloc_inodes+0x17c/0x3b0 [btrfs]\n   btrfs_start_delalloc_roots+0x17c/0x288 [btrfs]\n   shrink_delalloc+0x11c/0x280 [btrfs]\n   flush_space+0x288/0x328 [btrfs]\n   btrfs_async_reclaim_data_space+0x180/0x228 [btrfs]\n   process_one_work+0x228/0x680\n   worker_thread+0x1bc/0x360\n   kthread+0x100/0x118\n   ret_from_fork+0x10/0x20\n  ---[ end trace 0000000000000000 ]---\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1605632 OE len=16384 to_dec=16384 left=0\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1622016 OE len=12288 to_dec=12288 left=0\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1634304 OE len=8192 to_dec=4096 left=0\n  CPU: 1 UID: 0 PID: 3286940 Comm: kworker/u24:3 Tainted: G        W  OE      6.13.0-rc1-custom+ #89\n  Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n  Workqueue:  btrfs_work_helper [btrfs] (btrfs-endio-write)\n  pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n  pc : process_one_work+0x110/0x680\n  lr : worker_thread+0x1bc/0x360\n  Call trace:\n   process_one_work+0x110/0x680 (P)\n   worker_thread+0x1bc/0x360 (L)\n   worker_thread+0x1bc/0x360\n   kthread+0x100/0x118\n   ret_from_fork+0x10/0x20\n  Code: f84086a1 f9000fe1 53041c21 b9003361 (f9400661)\n  ---[ end trace 0000000000000000 ]---\n  Kernel panic - not syncing: Oops: Fatal exception\n  SMP: stopping secondary CPUs\n  SMP: failed to stop secondary CPUs 2-3\n  Dumping ftrace buffer:\n     (ftrace buffer empty)\n  Kernel Offset: 0x275bb9540000 from 0xffff800080000000\n  PHYS_OFFSET: 0xffff8fbba0000000\n  CPU features: 0x100,00000070,00801250,8201720b\n\n[CAUSE]\nThe above warning is triggered immediately after the delalloc range\nfailure, this happens in the following sequence:\n\n- Range [1568K, 1636K) is dirty\n\n   1536K  1568K     1600K    1636K  1664K\n   |      |/////////|////////|      |\n\n  Where 1536K, 1600K and 1664K are page boundaries (64K page size)\n\n- Enter extent_writepage() for page 1536K\n\n- Enter run_delalloc_nocow() with locke\n---truncated---"
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              "value": "AV:L - The vulnerable path is reached through ordinary filesystem syscalls (buffered write/fallocate on a mounted btrfs) with writeback executed by a kernel worker; no network or remote peer data is involved.\nAC:L - The attacker controls both sides of the race \u2014 they fill the filesystem to force the `btrfs_reserve_extent()` ENOSPC failure and issue the concurrent dirtying/writeback that leaves the ordered extent still in the io tree \u2014 and the upstream reproducer (generic/750) crashes with \"very high chance\"; subpage btrfs needs no kernel CONFIG, only a 4K-sector filesystem on a 64K/16K-page kernel, and the compressed-writeback variant exists on all page sizes.\nPR:L - Any unprivileged local user with write access to a btrfs filesystem (e.g. /home, /var/tmp) can create prealloc extents, drive the filesystem to ENOSPC, and dirty pages; no capabilities and no mount privileges are required.\nUI:N - Exploitation needs only the attacker\u0027s own writes on an already-mounted filesystem; writeback is initiated by the kernel (shrink_delalloc/reclaim worker) with no victim action.\nS:U - The corruption is confined to kernel memory and the btrfs filesystem within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The double `btrfs_remove_ordered_extent()`/`btrfs_put_ordered_extent()` frees the ordered-extent slab object while its embedded `btrfs_work` remains linked, giving a use-after-free on a sprayable kmem_cache object, and the duplicated extent/metadata accounting can hand the same on-disk extent to two files, exposing other users\u0027 data.\nI:H - The bug yields workqueue and rb-tree list corruption (re-INIT of a linked node plus double `list_add_tail`, `rb_erase` on a cleared node) and a UAF write primitive, plus doubled delalloc metadata release and `nr_ordered_extents` underflow that corrupt on-disk space accounting.\nA:H - The upstream report shows a WARNING followed by a NULL pointer dereference in `process_one_work` and \"Kernel panic - not syncing: Oops: Fatal exception\"; the reachable `BUG_ON(list_empty(\u0026root-\u003eordered_root))` gives a second guaranteed-crash path."
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix double accounting race when btrfs_run_delalloc_range() failed\n\n[BUG]\nWhen running btrfs with block size (4K) smaller than page size (64K,\naarch64), there is a very high chance to crash the kernel at\ngeneric/750, with the following messages:\n(before the call traces, there are 3 extra debug messages added)\n\n  BTRFS warning (device dm-3): read-write for sector size 4096 with page size 65536 is experimental\n  BTRFS info (device dm-3): checking UUID tree\n  hrtimer: interrupt took 5451385 ns\n  BTRFS error (device dm-3): cow_file_range failed, root=4957 inode=257 start=1605632 len=69632: -28\n  BTRFS error (device dm-3): run_delalloc_nocow failed, root=4957 inode=257 start=1605632 len=69632: -28\n  BTRFS error (device dm-3): failed to run delalloc range, root=4957 ino=257 folio=1572864 submit_bitmap=8-15 start=1605632 len=69632: -28\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 3020984 at ordered-data.c:360 can_finish_ordered_extent+0x370/0x3b8 [btrfs]\n  CPU: 2 UID: 0 PID: 3020984 Comm: kworker/u24:1 Tainted: G           OE      6.13.0-rc1-custom+ #89\n  Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n  Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n  Workqueue: events_unbound btrfs_async_reclaim_data_space [btrfs]\n  pc : can_finish_ordered_extent+0x370/0x3b8 [btrfs]\n  lr : can_finish_ordered_extent+0x1ec/0x3b8 [btrfs]\n  Call trace:\n   can_finish_ordered_extent+0x370/0x3b8 [btrfs] (P)\n   can_finish_ordered_extent+0x1ec/0x3b8 [btrfs] (L)\n   btrfs_mark_ordered_io_finished+0x130/0x2b8 [btrfs]\n   extent_writepage+0x10c/0x3b8 [btrfs]\n   extent_write_cache_pages+0x21c/0x4e8 [btrfs]\n   btrfs_writepages+0x94/0x160 [btrfs]\n   do_writepages+0x74/0x190\n   filemap_fdatawrite_wbc+0x74/0xa0\n   start_delalloc_inodes+0x17c/0x3b0 [btrfs]\n   btrfs_start_delalloc_roots+0x17c/0x288 [btrfs]\n   shrink_delalloc+0x11c/0x280 [btrfs]\n   flush_space+0x288/0x328 [btrfs]\n   btrfs_async_reclaim_data_space+0x180/0x228 [btrfs]\n   process_one_work+0x228/0x680\n   worker_thread+0x1bc/0x360\n   kthread+0x100/0x118\n   ret_from_fork+0x10/0x20\n  ---[ end trace 0000000000000000 ]---\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1605632 OE len=16384 to_dec=16384 left=0\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1622016 OE len=12288 to_dec=12288 left=0\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1634304 OE len=8192 to_dec=4096 left=0\n  CPU: 1 UID: 0 PID: 3286940 Comm: kworker/u24:3 Tainted: G        W  OE      6.13.0-rc1-custom+ #89\n  Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n  Workqueue:  btrfs_work_helper [btrfs] (btrfs-endio-write)\n  pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n  pc : process_one_work+0x110/0x680\n  lr : worker_thread+0x1bc/0x360\n  Call trace:\n   process_one_work+0x110/0x680 (P)\n   worker_thread+0x1bc/0x360 (L)\n   worker_thread+0x1bc/0x360\n   kthread+0x100/0x118\n   ret_from_fork+0x10/0x20\n  Code: f84086a1 f9000fe1 53041c21 b9003361 (f9400661)\n  ---[ end trace 0000000000000000 ]---\n  Kernel panic - not syncing: Oops: Fatal exception\n  SMP: stopping secondary CPUs\n  SMP: failed to stop secondary CPUs 2-3\n  Dumping ftrace buffer:\n     (ftrace buffer empty)\n  Kernel Offset: 0x275bb9540000 from 0xffff800080000000\n  PHYS_OFFSET: 0xffff8fbba0000000\n  CPU features: 0x100,00000070,00801250,8201720b\n\n[CAUSE]\nThe above warning is triggered immediately after the delalloc range\nfailure, this happens in the following sequence:\n\n- Range [1568K, 1636K) is dirty\n\n   1536K  1568K     1600K    1636K  1664K\n   |      |/////////|////////|      |\n\n  Where 1536K, 1600K and 1664K are page boundaries (64K page size)\n\n- Enter extent_writepage() for page 1536K\n\n- Enter run_delalloc_nocow() with locke\n---truncated---"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: se corrige la doble ejecuci\u00f3n de contabilidad cuando btrfs_run_delalloc_range() falla [ERROR] Al ejecutar btrfs con un tama\u00f1o de bloque (4K) menor que el tama\u00f1o de p\u00e1gina (64K, aarch64), hay una gran posibilidad de que se bloquee el kernel en generic/750, con los siguientes mensajes: (antes de los seguimientos de llamadas, se agregan 3 mensajes de depuraci\u00f3n adicionales) Advertencia de BTRFS (dispositivo dm-3): lectura y escritura para tama\u00f1o de sector 4096 con tama\u00f1o de p\u00e1gina 65536 es experimental Informaci\u00f3n de BTRFS (dispositivo dm-3): comprobando \u00e1rbol UUID hrtimer: la interrupci\u00f3n tom\u00f3 5451385 ns Error de BTRFS (dispositivo dm-3): cow_file_range fall\u00f3, root=4957 inode=257 start=1605632 len=69632: -28 Error de BTRFS (dispositivo dm-3): run_delalloc_nocow fall\u00f3, ra\u00edz=4957 inodo=257 inicio=1605632 len=69632: -28 Error de BTRFS (dispositivo dm-3): no se pudo ejecutar el rango delalloc, ra\u00edz=4957 ino=257 folio=1572864 submit_bitmap=8-15 inicio=1605632 len=69632: -28 ------------[ cortar aqu\u00ed ]------------ ADVERTENCIA: CPU: 2 PID: 3020984 at ordered-data.c:360 can_finish_ordered_extent+0x370/0x3b8 [btrfs] CPU: 2 UID: 0 PID: 3020984 Comm: kworker/u24:1 Tainted: G OE 6.13.0-rc1-custom+ #89 Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022 Workqueue: events_unbound btrfs_async_reclaim_data_space [btrfs] pc : can_finish_ordered_extent+0x370/0x3b8 [btrfs] lr : can_finish_ordered_extent+0x1ec/0x3b8 [btrfs] Call trace: can_finish_ordered_extent+0x370/0x3b8 [btrfs] (P) can_finish_ordered_extent+0x1ec/0x3b8 [btrfs] (L) btrfs_mark_ordered_io_finished+0x130/0x2b8 [btrfs] extent_writepage+0x10c/0x3b8 [btrfs] extent_write_cache_pages+0x21c/0x4e8 [btrfs] btrfs_writepages+0x94/0x160 [btrfs] do_writepages+0x74/0x190 filemap_fdatawrite_wbc+0x74/0xa0 start_delalloc_inodes+0x17c/0x3b0 [btrfs] btrfs_start_delalloc_roots+0x17c/0x288 [btrfs] shrink_delalloc+0x11c/0x280 [btrfs] flush_space+0x288/0x328 [btrfs] btrfs_async_reclaim_data_space+0x180/0x228 [btrfs] process_one_work+0x228/0x680 worker_thread+0x1bc/0x360 kthread+0x100/0x118 ret_from_fork+0x10/0x20 ---[ end trace 0000000000000000 ]--- BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1605632 OE len=16384 to_dec=16384 left=0 BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1622016 OE len=12288 to_dec=12288 left=0 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1634304 OE len=8192 to_dec=4096 left=0 CPU: 1 UID: 0 PID: 3286940 Comm: kworker/u24:3 Tainted: G W OE 6.13.0-rc1-custom+ #89 Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022 Workqueue: btrfs_work_helper [btrfs] (btrfs-endio-write) pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : process_one_work+0x110/0x680 lr : worker_thread+0x1bc/0x360 Call trace: process_one_work+0x110/0x680 (P) worker_thread+0x1bc/0x360 (L) worker_thread+0x1bc/0x360 kthread+0x100/0x118 ret_from_fork+0x10/0x20 Code: f84086a1 f9000fe1 53041c21 b9003361 (f9400661) ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Oops: Fatal exception SMP: stopping secondary CPUs SMP: failed to stop secondary CPUs 2-3 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: 0x275bb9540000 from 0xffff800080000000 PHYS_OFFSET: 0xffff8fbba0000000 CPU features: 0x100,00000070,00801250,8201720b [CAUSE] The above warning is triggered immediately after the delalloc range failure, this happens in the following sequence: - Range [1568K, 1636K) is dirty 1536K 1568K 1600K 1636K 1664K | |/////////|////////| | Where 1536K, 1600K and 1664K are page boundaries (64K page size) - Enter extent_writepage() for page 1536K - Enter run_delalloc_nocow() with locke ---truncado---"
          }
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        "id": "CVE-2024-58089",
        "lastModified": "2026-08-04T11:22:38.967",
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            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix double accounting race when btrfs_run_delalloc_range() failed\n\n[BUG]\nWhen running btrfs with block size (4K) smaller than page size (64K,\naarch64), there is a very high chance to crash the kernel at\ngeneric/750, with the following messages:\n(before the call traces, there are 3 extra debug messages added)\n\n  BTRFS warning (device dm-3): read-write for sector size 4096 with page size 65536 is experimental\n  BTRFS info (device dm-3): checking UUID tree\n  hrtimer: interrupt took 5451385 ns\n  BTRFS error (device dm-3): cow_file_range failed, root=4957 inode=257 start=1605632 len=69632: -28\n  BTRFS error (device dm-3): run_delalloc_nocow failed, root=4957 inode=257 start=1605632 len=69632: -28\n  BTRFS error (device dm-3): failed to run delalloc range, root=4957 ino=257 folio=1572864 submit_bitmap=8-15 start=1605632 len=69632: -28\n  ------------[ cut here ]------------\n  WARNING: CPU: 2 PID: 3020984 at ordered-data.c:360 can_finish_ordered_extent+0x370/0x3b8 [btrfs]\n  CPU: 2 UID: 0 PID: 3020984 Comm: kworker/u24:1 Tainted: G           OE      6.13.0-rc1-custom+ #89\n  Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n  Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n  Workqueue: events_unbound btrfs_async_reclaim_data_space [btrfs]\n  pc : can_finish_ordered_extent+0x370/0x3b8 [btrfs]\n  lr : can_finish_ordered_extent+0x1ec/0x3b8 [btrfs]\n  Call trace:\n   can_finish_ordered_extent+0x370/0x3b8 [btrfs] (P)\n   can_finish_ordered_extent+0x1ec/0x3b8 [btrfs] (L)\n   btrfs_mark_ordered_io_finished+0x130/0x2b8 [btrfs]\n   extent_writepage+0x10c/0x3b8 [btrfs]\n   extent_write_cache_pages+0x21c/0x4e8 [btrfs]\n   btrfs_writepages+0x94/0x160 [btrfs]\n   do_writepages+0x74/0x190\n   filemap_fdatawrite_wbc+0x74/0xa0\n   start_delalloc_inodes+0x17c/0x3b0 [btrfs]\n   btrfs_start_delalloc_roots+0x17c/0x288 [btrfs]\n   shrink_delalloc+0x11c/0x280 [btrfs]\n   flush_space+0x288/0x328 [btrfs]\n   btrfs_async_reclaim_data_space+0x180/0x228 [btrfs]\n   process_one_work+0x228/0x680\n   worker_thread+0x1bc/0x360\n   kthread+0x100/0x118\n   ret_from_fork+0x10/0x20\n  ---[ end trace 0000000000000000 ]---\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1605632 OE len=16384 to_dec=16384 left=0\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1622016 OE len=12288 to_dec=12288 left=0\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n  BTRFS critical (device dm-3): bad ordered extent accounting, root=4957 ino=257 OE offset=1634304 OE len=8192 to_dec=4096 left=0\n  CPU: 1 UID: 0 PID: 3286940 Comm: kworker/u24:3 Tainted: G        W  OE      6.13.0-rc1-custom+ #89\n  Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022\n  Workqueue:  btrfs_work_helper [btrfs] (btrfs-endio-write)\n  pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n  pc : process_one_work+0x110/0x680\n  lr : worker_thread+0x1bc/0x360\n  Call trace:\n   process_one_work+0x110/0x680 (P)\n   worker_thread+0x1bc/0x360 (L)\n   worker_thread+0x1bc/0x360\n   kthread+0x100/0x118\n   ret_from_fork+0x10/0x20\n  Code: f84086a1 f9000fe1 53041c21 b9003361 (f9400661)\n  ---[ end trace 0000000000000000 ]---\n  Kernel panic - not syncing: Oops: Fatal exception\n  SMP: stopping secondary CPUs\n  SMP: failed to stop secondary CPUs 2-3\n  Dumping ftrace buffer:\n     (ftrace buffer empty)\n  Kernel Offset: 0x275bb9540000 from 0xffff800080000000\n  PHYS_OFFSET: 0xffff8fbba0000000\n  CPU features: 0x100,00000070,00801250,8201720b\n\n[CAUSE]\nThe above warning is triggered immediately after the delalloc range\nfailure, this happens in the following sequence:\n\n- Range [1568K, 1636K) is dirty\n\n   1536K  1568K     1600K    1636K  1664K\n   |      |/////////|////////|      |\n\n  Where 1536K, 1600K and 1664K are page boundaries (64K page size)\n\n- Enter extent_writepage() for page 1536K\n\n- Enter run_delalloc_nocow() with locke\n---truncated---"
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The vulnerable path is reached through ordinary filesystem syscalls (buffered write/fallocate on a mounted btrfs) with writeback executed by a kernel worker; no network or remote peer data is involved.\nAC:L - The attacker controls both sides of the race \u2014 they fill the filesystem to force the `btrfs_reserve_extent()` ENOSPC failure and issue the concurrent dirtying/writeback that leaves the ordered extent still in the io tree \u2014 and the upstream reproducer (generic/750) crashes with \"very high chance\"; subpage btrfs needs no kernel CONFIG, only a 4K-sector filesystem on a 64K/16K-page kernel, and the compressed-writeback variant exists on all page sizes.\nPR:L - Any unprivileged local user with write access to a btrfs filesystem (e.g. /home, /var/tmp) can create prealloc extents, drive the filesystem to ENOSPC, and dirty pages; no capabilities and no mount privileges are required.\nUI:N - Exploitation needs only the attacker\u0027s own writes on an already-mounted filesystem; writeback is initiated by the kernel (shrink_delalloc/reclaim worker) with no victim action.\nS:U - The corruption is confined to kernel memory and the btrfs filesystem within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The double `btrfs_remove_ordered_extent()`/`btrfs_put_ordered_extent()` frees the ordered-extent slab object while its embedded `btrfs_work` remains linked, giving a use-after-free on a sprayable kmem_cache object, and the duplicated extent/metadata accounting can hand the same on-disk extent to two files, exposing other users\u0027 data.\nI:H - The bug yields workqueue and rb-tree list corruption (re-INIT of a linked node plus double `list_add_tail`, `rb_erase` on a cleared node) and a UAF write primitive, plus doubled delalloc metadata release and `nr_ordered_extents` underflow that corrupt on-disk space accounting.\nA:H - The upstream report shows a WARNING followed by a NULL pointer dereference in `process_one_work` and \"Kernel panic - not syncing: Oops: Fatal exception\"; the reachable `BUG_ON(list_empty(\u0026root-\u003eordered_root))` gives a second guaranteed-crash path."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:47:39.479Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/21333148b5c9e52f41fafcedec3810b56a5e0e40"
            },
            {
              "url": "https://git.kernel.org/stable/c/0283ee1912c8e243c931f4ee5b3672e954fe0384"
            },
            {
              "url": "https://git.kernel.org/stable/c/72dad8e377afa50435940adfb697e070d3556670"
            }
          ],
          "title": "btrfs: fix double accounting race when btrfs_run_delalloc_range() failed",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-58089",
        "datePublished": "2025-03-12T09:41:59.709Z",
        "dateReserved": "2025-03-06T15:52:09.187Z",
        "dateUpdated": "2026-08-05T11:47:39.479Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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