{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38358", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.007Z", "datePublished": "2025-07-25T12:47:29.515Z", "dateUpdated": "2026-05-11T21:26:26.720Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:26:26.720Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix race between async reclaim worker and close_ctree()\n\nSyzbot reported an assertion failure due to an attempt to add a delayed\niput after we have set BTRFS_FS_STATE_NO_DELAYED_IPUT in the fs_info\nstate:\n\n WARNING: CPU: 0 PID: 65 at fs/btrfs/inode.c:3420 btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420\n Modules linked in:\n CPU: 0 UID: 0 PID: 65 Comm: kworker/u8:4 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full)\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\n Workqueue: btrfs-endio-write btrfs_work_helper\n RIP: 0010:btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420\n Code: 4e ad 5d (...)\n RSP: 0018:ffffc9000213f780 EFLAGS: 00010293\n RAX: ffffffff83c635b7 RBX: ffff888058920000 RCX: ffff88801c769e00\n RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000\n RBP: 0000000000000001 R08: ffff888058921b67 R09: 1ffff1100b12436c\n R10: dffffc0000000000 R11: ffffed100b12436d R12: 0000000000000001\n R13: dffffc0000000000 R14: ffff88807d748000 R15: 0000000000000100\n FS: 0000000000000000(0000) GS:ffff888125c53000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00002000000bd038 CR3: 000000006a142000 CR4: 00000000003526f0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n btrfs_put_ordered_extent+0x19f/0x470 fs/btrfs/ordered-data.c:635\n btrfs_finish_one_ordered+0x11d8/0x1b10 fs/btrfs/inode.c:3312\n btrfs_work_helper+0x399/0xc20 fs/btrfs/async-thread.c:312\n process_one_work kernel/workqueue.c:3238 [inline]\n process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321\n worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402\n kthread+0x70e/0x8a0 kernel/kthread.c:464\n ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\nThis can happen due to a race with the async reclaim worker like this:\n\n1) The async metadata reclaim worker enters shrink_delalloc(), which calls\n btrfs_start_delalloc_roots() with an nr_pages argument that has a value\n less than LONG_MAX, and that in turn enters start_delalloc_inodes(),\n which sets the local variable 'full_flush' to false because\n wbc->nr_to_write is less than LONG_MAX;\n\n2) There it finds inode X in a root's delalloc list, grabs a reference for\n inode X (with igrab()), and triggers writeback for it with\n filemap_fdatawrite_wbc(), which creates an ordered extent for inode X;\n\n3) The unmount sequence starts from another task, we enter close_ctree()\n and we flush the workqueue fs_info->endio_write_workers, which waits\n for the ordered extent for inode X to complete and when dropping the\n last reference of the ordered extent, with btrfs_put_ordered_extent(),\n when we call btrfs_add_delayed_iput() we don't add the inode to the\n list of delayed iputs because it has a refcount of 2, so we decrement\n it to 1 and return;\n\n4) Shortly after at close_ctree() we call btrfs_run_delayed_iputs() which\n runs all delayed iputs, and then we set BTRFS_FS_STATE_NO_DELAYED_IPUT\n in the fs_info state;\n\n5) The async reclaim worker, after calling filemap_fdatawrite_wbc(), now\n calls btrfs_add_delayed_iput() for inode X and there we trigger an\n assertion failure since the fs_info state has the flag\n BTRFS_FS_STATE_NO_DELAYED_IPUT set.\n\nFix this by setting BTRFS_FS_STATE_NO_DELAYED_IPUT only after we wait for\nthe async reclaim workers to finish, after we call cancel_work_sync() for\nthem at close_ctree(), and by running delayed iputs after wait for the\nreclaim workers to finish and before setting the bit.\n\nThis race was recently introduced by commit 19e60b2a95f5 (\"btrfs: add\nextra warning if delayed iput is added when it's not allowed\"). Without\nthe new validation at btrfs_add_delayed_iput(), \n---truncated---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/disk-io.c"], "versions": [{"version": "19e60b2a95f5d6b77d972c7bec35a11e70fd118c", "lessThan": "4693cda2c06039c875f2eef0123b22340c34bfa0", "status": "affected", "versionType": "git"}, {"version": "19e60b2a95f5d6b77d972c7bec35a11e70fd118c", "lessThan": "a26bf338cdad3643a6e7c3d78a172baadba15c1a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/disk-io.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.5", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.15.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4693cda2c06039c875f2eef0123b22340c34bfa0"}, {"url": "https://git.kernel.org/stable/c/a26bf338cdad3643a6e7c3d78a172baadba15c1a"}], "title": "btrfs: fix race between async reclaim worker and close_ctree()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F4823E88-411C-4CCD-AA8D-3917D070E873", "versionEndExcluding": "6.15.5", "versionStartIncluding": "6.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*", "matchCriteriaId": "6D4894DB-CCFE-4602-B1BF-3960B2E19A01", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*", "matchCriteriaId": "09709862-E348-4378-8632-5A7813EDDC86", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*", "matchCriteriaId": "415BF58A-8197-43F5-B3D7-D1D63057A26E", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix race between async reclaim worker and close_ctree()\n\nSyzbot reported an assertion failure due to an attempt to add a delayed\niput after we have set BTRFS_FS_STATE_NO_DELAYED_IPUT in the fs_info\nstate:\n\n WARNING: CPU: 0 PID: 65 at fs/btrfs/inode.c:3420 btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420\n Modules linked in:\n CPU: 0 UID: 0 PID: 65 Comm: kworker/u8:4 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full)\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\n Workqueue: btrfs-endio-write btrfs_work_helper\n RIP: 0010:btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420\n Code: 4e ad 5d (...)\n RSP: 0018:ffffc9000213f780 EFLAGS: 00010293\n RAX: ffffffff83c635b7 RBX: ffff888058920000 RCX: ffff88801c769e00\n RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000\n RBP: 0000000000000001 R08: ffff888058921b67 R09: 1ffff1100b12436c\n R10: dffffc0000000000 R11: ffffed100b12436d R12: 0000000000000001\n R13: dffffc0000000000 R14: ffff88807d748000 R15: 0000000000000100\n FS: 0000000000000000(0000) GS:ffff888125c53000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00002000000bd038 CR3: 000000006a142000 CR4: 00000000003526f0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n btrfs_put_ordered_extent+0x19f/0x470 fs/btrfs/ordered-data.c:635\n btrfs_finish_one_ordered+0x11d8/0x1b10 fs/btrfs/inode.c:3312\n btrfs_work_helper+0x399/0xc20 fs/btrfs/async-thread.c:312\n process_one_work kernel/workqueue.c:3238 [inline]\n process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321\n worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402\n kthread+0x70e/0x8a0 kernel/kthread.c:464\n ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\nThis can happen due to a race with the async reclaim worker like this:\n\n1) The async metadata reclaim worker enters shrink_delalloc(), which calls\n btrfs_start_delalloc_roots() with an nr_pages argument that has a value\n less than LONG_MAX, and that in turn enters start_delalloc_inodes(),\n which sets the local variable 'full_flush' to false because\n wbc->nr_to_write is less than LONG_MAX;\n\n2) There it finds inode X in a root's delalloc list, grabs a reference for\n inode X (with igrab()), and triggers writeback for it with\n filemap_fdatawrite_wbc(), which creates an ordered extent for inode X;\n\n3) The unmount sequence starts from another task, we enter close_ctree()\n and we flush the workqueue fs_info->endio_write_workers, which waits\n for the ordered extent for inode X to complete and when dropping the\n last reference of the ordered extent, with btrfs_put_ordered_extent(),\n when we call btrfs_add_delayed_iput() we don't add the inode to the\n list of delayed iputs because it has a refcount of 2, so we decrement\n it to 1 and return;\n\n4) Shortly after at close_ctree() we call btrfs_run_delayed_iputs() which\n runs all delayed iputs, and then we set BTRFS_FS_STATE_NO_DELAYED_IPUT\n in the fs_info state;\n\n5) The async reclaim worker, after calling filemap_fdatawrite_wbc(), now\n calls btrfs_add_delayed_iput() for inode X and there we trigger an\n assertion failure since the fs_info state has the flag\n BTRFS_FS_STATE_NO_DELAYED_IPUT set.\n\nFix this by setting BTRFS_FS_STATE_NO_DELAYED_IPUT only after we wait for\nthe async reclaim workers to finish, after we call cancel_work_sync() for\nthem at close_ctree(), and by running delayed iputs after wait for the\nreclaim workers to finish and before setting the bit.\n\nThis race was recently introduced by commit 19e60b2a95f5 (\"btrfs: add\nextra warning if delayed iput is added when it's not allowed\"). Without\nthe new validation at btrfs_add_delayed_iput(), \n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: correcci\u00f3n de la ejecuci\u00f3n entre el trabajador de recuperaci\u00f3n as\u00edncrono y close_ctree() Syzbot inform\u00f3 de un error de aserci\u00f3n debido a un intento de agregar una entrada retrasada despu\u00e9s de que hayamos establecido BTRFS_FS_STATE_NO_DELAYED_IPUT en el estado WARNING: CPU: 0 PID: 65 at fs/btrfs/inode.c:3420 btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420 Modules linked in: CPU: 0 UID: 0 PID: 65 Comm: kworker/u8:4 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: btrfs-endio-write btrfs_work_helper RIP: 0010:btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420 Code: 4e ad 5d (...) RSP: 0018:ffffc9000213f780 EFLAGS: 00010293 RAX: ffffffff83c635b7 RBX: ffff888058920000 RCX: ffff88801c769e00 RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffff888058921b67 R09: 1ffff1100b12436c R10: dffffc0000000000 R11: ffffed100b12436d R12: 0000000000000001 R13: dffffc0000000000 R14: ffff88807d748000 R15: 0000000000000100 FS: 0000000000000000(0000) GS:ffff888125c53000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 ---truncado--- Call Trace: btrfs_put_ordered_extent+0x19f/0x470 fs/btrfs/ordered-data.c:635 btrfs_finish_one_ordered+0x11d8/0x1b10 fs/btrfs/inode.c:3312 btrfs_work_helper+0x399/0xc20 fs/btrfs/async-thread.c:312 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Esto puede suceder debido a una ejecuci\u00f3n con el trabajador de recuperaci\u00f3n as\u00edncrono como este: 1) El trabajador de recuperaci\u00f3n de metadatos as\u00edncrono ingresa a shrink_delalloc(), que llama a btrfs_start_delalloc_roots() con un argumento nr_pages que tiene un valor menor que LONG_MAX, y que a su vez ingresa a start_delalloc_inodes(), que establece la variable local 'full_flush' en falso porque wbc-&gt;nr_to_write es menor que LONG_MAX; 2) All\u00ed encuentra el inodo X en una lista delalloc de la ra\u00edz, toma una referencia para el inodo X (con igrab()), y activa la escritura diferida para \u00e9l con filemap_fdatawrite_wbc(), que crea una extensi\u00f3n ordenada para el inodo X; 3) La secuencia de desmontaje comienza desde otra tarea, ingresamos close_ctree() y limpiamos la cola de trabajo fs_info-&gt;endio_write_workers, que espera a que se complete la extensi\u00f3n ordenada para el inodo X y cuando eliminamos la \u00faltima referencia de la extensi\u00f3n ordenada, con btrfs_put_ordered_extent(), cuando llamamos a btrfs_add_delayed_iput() no agregamos el inodo a la lista de entradas retrasadas porque tiene un refcount de 2, por lo que lo decrementamos a 1 y regresamos; 4) Poco despu\u00e9s, en close_ctree(), llamamos a btrfs_run_delayed_iputs(), que ejecuta todas las entradas retrasadas, y luego establecemos BTRFS_FS_STATE_NO_DELAYED_IPUT en el estado fs_info. 5) El trabajador de recuperaci\u00f3n as\u00edncrono, despu\u00e9s de llamar a filemap_fdatawrite_wbc(), ahora llama a btrfs_add_delayed_iput() para el inodo X y all\u00ed desencadenamos un error de aserci\u00f3n, ya que el estado fs_info tiene el indicador BTRFS_FS_STATE_NO_DELAYED_IPUT establecido. Solucione esto estableciendo BTRFS_FS_STATE_NO_DELAYED_IPUT solo despu\u00e9s de esperar a que finalicen los trabajadores de recuperaci\u00f3n as\u00edncronos, despu\u00e9s de llamar a cancel_work_sync() para ellos en close_ctree(), y ejecutando las entradas retrasadas despu\u00e9s de esperar a que finalicen los trabajadores de recuperaci\u00f3n y antes de establecer el bit. Esta ejecuci\u00f3n se introdujo recientemente mediante el commit 19e60b2a95f5 (\"btrfs: a\u00f1adir una advertencia adicional si se a\u00f1ade una entrada retardada cuando no est\u00e1 permitida\"). Sin la nueva validaci\u00f3n en btrfs_add_delayed_iput(), ---truncado---"}], "id": "CVE-2025-38358", "lastModified": "2025-11-18T20:34:06.943", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-07-25T13:15:24.573", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4693cda2c06039c875f2eef0123b22340c34bfa0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a26bf338cdad3643a6e7c3d78a172baadba15c1a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: btrfs: fix race between async reclaim worker and close_ctree()", "id": "2383444", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2383444"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: fix race between async reclaim worker and close_ctree()\nSyzbot reported an assertion failure due to an attempt to add a delayed\niput after we have set BTRFS_FS_STATE_NO_DELAYED_IPUT in the fs_info\nstate:\nWARNING: CPU: 0 PID: 65 at fs/btrfs/inode.c:3420 btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420\nModules linked in:\nCPU: 0 UID: 0 PID: 65 Comm: kworker/u8:4 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\nWorkqueue: btrfs-endio-write btrfs_work_helper\nRIP: 0010:btrfs_add_delayed_iput+0x2f8/0x370 fs/btrfs/inode.c:3420\nCode: 4e ad 5d (...)\nRSP: 0018:ffffc9000213f780 EFLAGS: 00010293\nRAX: ffffffff83c635b7 RBX: ffff888058920000 RCX: ffff88801c769e00\nRDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000\nRBP: 0000000000000001 R08: ffff888058921b67 R09: 1ffff1100b12436c\nR10: dffffc0000000000 R11: ffffed100b12436d R12: 0000000000000001\nR13: dffffc0000000000 R14: ffff88807d748000 R15: 0000000000000100\nFS: 0000000000000000(0000) GS:ffff888125c53000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00002000000bd038 CR3: 000000006a142000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\nbtrfs_put_ordered_extent+0x19f/0x470 fs/btrfs/ordered-data.c:635\nbtrfs_finish_one_ordered+0x11d8/0x1b10 fs/btrfs/inode.c:3312\nbtrfs_work_helper+0x399/0xc20 fs/btrfs/async-thread.c:312\nprocess_one_work kernel/workqueue.c:3238 [inline]\nprocess_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321\nworker_thread+0x8a0/0xda0 kernel/workqueue.c:3402\nkthread+0x70e/0x8a0 kernel/kthread.c:464\nret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148\nret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n</TASK>\nThis can happen due to a race with the async reclaim worker like this:\n1) The async metadata reclaim worker enters shrink_delalloc(), which calls\nbtrfs_start_delalloc_roots() with an nr_pages argument that has a value\nless than LONG_MAX, and that in turn enters start_delalloc_inodes(),\nwhich sets the local variable 'full_flush' to false because\nwbc->nr_to_write is less than LONG_MAX;\n2) There it finds inode X in a root's delalloc list, grabs a reference for\ninode X (with igrab()), and triggers writeback for it with\nfilemap_fdatawrite_wbc(), which creates an ordered extent for inode X;\n3) The unmount sequence starts from another task, we enter close_ctree()\nand we flush the workqueue fs_info->endio_write_workers, which waits\nfor the ordered extent for inode X to complete and when dropping the\nlast reference of the ordered extent, with btrfs_put_ordered_extent(),\nwhen we call btrfs_add_delayed_iput() we don't add the inode to the\nlist of delayed iputs because it has a refcount of 2, so we decrement\nit to 1 and return;\n4) Shortly after at close_ctree() we call btrfs_run_delayed_iputs() which\nruns all delayed iputs, and then we set BTRFS_FS_STATE_NO_DELAYED_IPUT\nin the fs_info state;\n5) The async reclaim worker, after calling filemap_fdatawrite_wbc(), now\ncalls btrfs_add_delayed_iput() for inode X and there we trigger an\nassertion failure since the fs_info state has the flag\nBTRFS_FS_STATE_NO_DELAYED_IPUT set.\nFix this by setting BTRFS_FS_STATE_NO_DELAYED_IPUT only after we wait for\nthe async reclaim workers to finish, after we call cancel_work_sync() for\nthem at close_ctree(), and by running delayed iputs after wait for the\nreclaim workers to finish and before setting the bit.\nThis race was recently introduced by commit 19e60b2a95f5 (\"btrfs: add\nextra warning if delayed iput is added when it's not allowed\"). Without\nthe new validation at btrfs_add_delayed_iput(), \n---truncated---"], "name": "CVE-2025-38358", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38358\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38358\nhttps://lore.kernel.org/linux-cve-announce/2025072556-CVE-2025-38358-8d7f@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-28T12:45:56.224534+00:00", "updated": "2025-07-28T12:45:56.224587+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}