{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-21754", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.760Z", "datePublished": "2025-02-27T02:12:23.738Z", "dateUpdated": "2026-05-11T21:05:47.261Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:05:47.261Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix assertion failure when splitting ordered extent after transaction abort\n\nIf while we are doing a direct IO write a transaction abort happens, we\nmark all existing ordered extents with the BTRFS_ORDERED_IOERR flag (done\nat btrfs_destroy_ordered_extents()), and then after that if we enter\nbtrfs_split_ordered_extent() and the ordered extent has bytes left\n(meaning we have a bio that doesn't cover the whole ordered extent, see\ndetails at btrfs_extract_ordered_extent()), we will fail on the following\nassertion at btrfs_split_ordered_extent():\n\n ASSERT(!(flags & ~BTRFS_ORDERED_TYPE_FLAGS));\n\nbecause the BTRFS_ORDERED_IOERR flag is set and the definition of\nBTRFS_ORDERED_TYPE_FLAGS is just the union of all flags that identify the\ntype of write (regular, nocow, prealloc, compressed, direct IO, encoded).\n\nFix this by returning an error from btrfs_extract_ordered_extent() if we\nfind the BTRFS_ORDERED_IOERR flag in the ordered extent. The error will\nbe the error that resulted in the transaction abort or -EIO if no\ntransaction abort happened.\n\nThis was recently reported by syzbot with the following trace:\n\n FAULT_INJECTION: forcing a failure.\n name failslab, interval 1, probability 0, space 0, times 1\n CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller #0\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\n Call Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n fail_dump lib/fault-inject.c:53 [inline]\n should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154\n should_failslab+0xac/0x100 mm/failslab.c:46\n slab_pre_alloc_hook mm/slub.c:4072 [inline]\n slab_alloc_node mm/slub.c:4148 [inline]\n __do_kmalloc_node mm/slub.c:4297 [inline]\n __kmalloc_noprof+0xdd/0x4c0 mm/slub.c:4310\n kmalloc_noprof include/linux/slab.h:905 [inline]\n kzalloc_noprof include/linux/slab.h:1037 [inline]\n btrfs_chunk_alloc_add_chunk_item+0x244/0x1100 fs/btrfs/volumes.c:5742\n reserve_chunk_space+0x1ca/0x2c0 fs/btrfs/block-group.c:4292\n check_system_chunk fs/btrfs/block-group.c:4319 [inline]\n do_chunk_alloc fs/btrfs/block-group.c:3891 [inline]\n btrfs_chunk_alloc+0x77b/0xf80 fs/btrfs/block-group.c:4187\n find_free_extent_update_loop fs/btrfs/extent-tree.c:4166 [inline]\n find_free_extent+0x42d1/0x5810 fs/btrfs/extent-tree.c:4579\n btrfs_reserve_extent+0x422/0x810 fs/btrfs/extent-tree.c:4672\n btrfs_new_extent_direct fs/btrfs/direct-io.c:186 [inline]\n btrfs_get_blocks_direct_write+0x706/0xfa0 fs/btrfs/direct-io.c:321\n btrfs_dio_iomap_begin+0xbb7/0x1180 fs/btrfs/direct-io.c:525\n iomap_iter+0x697/0xf60 fs/iomap/iter.c:90\n __iomap_dio_rw+0xeb9/0x25b0 fs/iomap/direct-io.c:702\n btrfs_dio_write fs/btrfs/direct-io.c:775 [inline]\n btrfs_direct_write+0x610/0xa30 fs/btrfs/direct-io.c:880\n btrfs_do_write_iter+0x2a0/0x760 fs/btrfs/file.c:1397\n do_iter_readv_writev+0x600/0x880\n vfs_writev+0x376/0xba0 fs/read_write.c:1050\n do_pwritev fs/read_write.c:1146 [inline]\n __do_sys_pwritev2 fs/read_write.c:1204 [inline]\n __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x7f1281f85d29\n RSP: 002b:00007f12819fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148\n RAX: ffffffffffffffda RBX: 00007f1282176080 RCX: 00007f1281f85d29\n RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000005\n RBP: 00007f12819fe090 R08: 0000000000000000 R09: 0000000000000003\n R10: 0000000000007000 R11: 0000000000000246 R12: 0000000000000002\n R13: 0000000000000000 R14: 00007f1282176080 R15: 00007ffcb9e23328\n </TASK>\n BTRFS error (device loop0 state A): Transaction aborted (error -12)\n BTRFS: error (device loop0 state A\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/ordered-data.c"], "versions": [{"version": "52b1fdca23ac0fbcad363a1a5b426bf0d56b715a", "lessThan": "927b930f117bbae730a853c1dc43da8afe8380fa", "status": "affected", "versionType": "git"}, {"version": "52b1fdca23ac0fbcad363a1a5b426bf0d56b715a", "lessThan": "0ff88c2a742a7cbaa4d08507d864737d099b435a", "status": "affected", "versionType": "git"}, {"version": "52b1fdca23ac0fbcad363a1a5b426bf0d56b715a", "lessThan": "8ea8db4216d1029527ab4666f730650419451e32", "status": "affected", "versionType": "git"}, {"version": "52b1fdca23ac0fbcad363a1a5b426bf0d56b715a", "lessThan": "0d85f5c2dd91df6b5da454406756f463ba923b69", "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/ordered-data.c"], "versions": [{"version": "6.5", "status": "affected"}, {"version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.78", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.14", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.3", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14", "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": "6.5", "versionEndExcluding": "6.6.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.12.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.13.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/927b930f117bbae730a853c1dc43da8afe8380fa"}, {"url": "https://git.kernel.org/stable/c/0ff88c2a742a7cbaa4d08507d864737d099b435a"}, {"url": "https://git.kernel.org/stable/c/8ea8db4216d1029527ab4666f730650419451e32"}, {"url": "https://git.kernel.org/stable/c/0d85f5c2dd91df6b5da454406756f463ba923b69"}], "title": "btrfs: fix assertion failure when splitting ordered extent after transaction abort", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "620D4308-FEF2-4D7F-84A9-21E66BDB5A28", "versionEndExcluding": "6.6.78", "versionStartIncluding": "6.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "033BB7EE-C9A2-45EA-BAC9-87BB9D951BCD", "versionEndExcluding": "6.12.14", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0E92CEE3-1FC3-4AFC-A513-DEDBA7414F00", "versionEndExcluding": "6.13.3", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*", "matchCriteriaId": "186716B6-2B66-4BD0-852E-D48E71C0C85F", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix assertion failure when splitting ordered extent after transaction abort\n\nIf while we are doing a direct IO write a transaction abort happens, we\nmark all existing ordered extents with the BTRFS_ORDERED_IOERR flag (done\nat btrfs_destroy_ordered_extents()), and then after that if we enter\nbtrfs_split_ordered_extent() and the ordered extent has bytes left\n(meaning we have a bio that doesn't cover the whole ordered extent, see\ndetails at btrfs_extract_ordered_extent()), we will fail on the following\nassertion at btrfs_split_ordered_extent():\n\n ASSERT(!(flags & ~BTRFS_ORDERED_TYPE_FLAGS));\n\nbecause the BTRFS_ORDERED_IOERR flag is set and the definition of\nBTRFS_ORDERED_TYPE_FLAGS is just the union of all flags that identify the\ntype of write (regular, nocow, prealloc, compressed, direct IO, encoded).\n\nFix this by returning an error from btrfs_extract_ordered_extent() if we\nfind the BTRFS_ORDERED_IOERR flag in the ordered extent. The error will\nbe the error that resulted in the transaction abort or -EIO if no\ntransaction abort happened.\n\nThis was recently reported by syzbot with the following trace:\n\n FAULT_INJECTION: forcing a failure.\n name failslab, interval 1, probability 0, space 0, times 1\n CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller #0\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\n Call Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n fail_dump lib/fault-inject.c:53 [inline]\n should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154\n should_failslab+0xac/0x100 mm/failslab.c:46\n slab_pre_alloc_hook mm/slub.c:4072 [inline]\n slab_alloc_node mm/slub.c:4148 [inline]\n __do_kmalloc_node mm/slub.c:4297 [inline]\n __kmalloc_noprof+0xdd/0x4c0 mm/slub.c:4310\n kmalloc_noprof include/linux/slab.h:905 [inline]\n kzalloc_noprof include/linux/slab.h:1037 [inline]\n btrfs_chunk_alloc_add_chunk_item+0x244/0x1100 fs/btrfs/volumes.c:5742\n reserve_chunk_space+0x1ca/0x2c0 fs/btrfs/block-group.c:4292\n check_system_chunk fs/btrfs/block-group.c:4319 [inline]\n do_chunk_alloc fs/btrfs/block-group.c:3891 [inline]\n btrfs_chunk_alloc+0x77b/0xf80 fs/btrfs/block-group.c:4187\n find_free_extent_update_loop fs/btrfs/extent-tree.c:4166 [inline]\n find_free_extent+0x42d1/0x5810 fs/btrfs/extent-tree.c:4579\n btrfs_reserve_extent+0x422/0x810 fs/btrfs/extent-tree.c:4672\n btrfs_new_extent_direct fs/btrfs/direct-io.c:186 [inline]\n btrfs_get_blocks_direct_write+0x706/0xfa0 fs/btrfs/direct-io.c:321\n btrfs_dio_iomap_begin+0xbb7/0x1180 fs/btrfs/direct-io.c:525\n iomap_iter+0x697/0xf60 fs/iomap/iter.c:90\n __iomap_dio_rw+0xeb9/0x25b0 fs/iomap/direct-io.c:702\n btrfs_dio_write fs/btrfs/direct-io.c:775 [inline]\n btrfs_direct_write+0x610/0xa30 fs/btrfs/direct-io.c:880\n btrfs_do_write_iter+0x2a0/0x760 fs/btrfs/file.c:1397\n do_iter_readv_writev+0x600/0x880\n vfs_writev+0x376/0xba0 fs/read_write.c:1050\n do_pwritev fs/read_write.c:1146 [inline]\n __do_sys_pwritev2 fs/read_write.c:1204 [inline]\n __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x7f1281f85d29\n RSP: 002b:00007f12819fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148\n RAX: ffffffffffffffda RBX: 00007f1282176080 RCX: 00007f1281f85d29\n RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000005\n RBP: 00007f12819fe090 R08: 0000000000000000 R09: 0000000000000003\n R10: 0000000000007000 R11: 0000000000000246 R12: 0000000000000002\n R13: 0000000000000000 R14: 00007f1282176080 R15: 00007ffcb9e23328\n </TASK>\n BTRFS error (device loop0 state A): Transaction aborted (error -12)\n BTRFS: error (device loop0 state A\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: corrige el error de aserci\u00f3n al dividir la extensi\u00f3n ordenada despu\u00e9s de la interrupci\u00f3n de la transacci\u00f3n Si mientras estamos realizando una escritura de E/S directa ocurre una interrupci\u00f3n de la transacci\u00f3n, marcamos todas las extensiones ordenadas existentes con el indicador BTRFS_ORDERED_IOERR (hecho en btrfs_destroy_ordered_extents()), y luego de eso si ingresamos btrfs_split_ordered_extent() y la extensi\u00f3n ordenada tiene bytes restantes (lo que significa que tenemos una biograf\u00eda que no cubre toda la extensi\u00f3n ordenada, vea los detalles en btrfs_extract_ordered_extent()), fallaremos en la siguiente aserci\u00f3n en btrfs_split_ordered_extent(): ASSERT(!(flags &amp; ~BTRFS_ORDERED_TYPE_FLAGS)); porque el indicador BTRFS_ORDERED_IOERR est\u00e1 configurado y la definici\u00f3n de BTRFS_ORDERED_TYPE_FLAGS es solo la uni\u00f3n de todos los indicadores que identifican el tipo de escritura (regular, nocow, prealloc, comprimido, E/S directa, codificado). Solucione esto devolviendo un error de btrfs_extract_ordered_extent() si encontramos el indicador BTRFS_ORDERED_IOERR en la extensi\u00f3n ordenada. El error ser\u00e1 el error que result\u00f3 en la interrupci\u00f3n de la transacci\u00f3n o -EIO si no ocurri\u00f3 ninguna interrupci\u00f3n de la transacci\u00f3n. Esto fue informado recientemente por syzbot con el siguiente seguimiento: FAULT_INJECTION: forzando una falla. nombre failslab, intervalo 1, probabilidad 0, espacio 0, multiplicado por 1 CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 No contaminado 6.13.0-rc5-syzkaller #0 Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 01/04/2014 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:94 [en l\u00ednea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 fail_dump lib/fault-inject.c:53 [en l\u00ednea] should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154 should_failslab+0xac/0x100 mm/failslab.c:46 slab_pre_alloc_hook mm/slub.c:4072 [en l\u00ednea] slab_alloc_node mm/slub.c:4148 [en l\u00ednea] __do_kmalloc_node mm/slub.c:4297 [en l\u00ednea] __kmalloc_noprof+0xdd/0x4c0 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [en l\u00ednea] kzalloc_noprof include/linux/slab.h:1037 [en l\u00ednea] btrfs_chunk_alloc_add_chunk_item+0x244/0x1100 fs/btrfs/volumes.c:5742 reserve_chunk_space+0x1ca/0x2c0 fs/btrfs/block-group.c:4292 check_system_chunk fs/btrfs/block-group.c:4319 [en l\u00ednea] do_chunk_alloc fs/btrfs/block-group.c:3891 [en l\u00ednea] btrfs_chunk_alloc+0x77b/0xf80 fs/btrfs/block-group.c:4187 find_free_extent_update_loop fs/btrfs/extent-tree.c:4166 [en l\u00ednea] find_free_extent+0x42d1/0x5810 fs/btrfs/extent-tree.c:4579 btrfs_reserve_extent+0x422/0x810 fs/btrfs/extent-tree.c:4672 btrfs_new_extent_direct fs/btrfs/direct-io.c:186 [en l\u00ednea] btrfs_get_blocks_direct_write+0x706/0xfa0 fs/btrfs/direct-io.c:321 btrfs_dio_iomap_begin+0xbb7/0x1180 fs/btrfs/direct-io.c:525 iomap_iter+0x697/0xf60 fs/iomap/iter.c:90 __iomap_dio_rw+0xeb9/0x25b0 fs/iomap/direct-io.c:702 btrfs_dio_write fs/btrfs/direct-io.c:775 [en l\u00ednea] btrfs_direct_write+0x610/0xa30 fs/btrfs/direct-io.c:880 btrfs_do_write_iter+0x2a0/0x760 fs/btrfs/file.c:1397 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1050 do_pwritev fs/read_write.c:1146 [en l\u00ednea] __do_sys_pwritev2 fs/read_write.c:1204 [en l\u00ednea] __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1281f85d29 RSP: 002b:00007f12819fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f1282176080 RCX: 00007f1281f85d29 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 00000000000000005 RBP: 00007f12819fe090 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007000 R11: 0000000000000246 R12: 0000000000000002 R13: 0000000000000000 R14: 00007f1282176080 R15: 00007ffcb9e23328 Error BTRFS (estado A del bucle 0 del dispositivo): transacci\u00f3n abortada (error -12) BTRFS: ---truncado---"}], "id": "CVE-2025-21754", "lastModified": "2025-10-28T20:50:26.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-27T03:15:16.050", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0d85f5c2dd91df6b5da454406756f463ba923b69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0ff88c2a742a7cbaa4d08507d864737d099b435a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8ea8db4216d1029527ab4666f730650419451e32"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/927b930f117bbae730a853c1dc43da8afe8380fa"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: btrfs: fix assertion failure when splitting ordered extent after transaction abort", "id": "2348548", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348548"}, "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 assertion failure when splitting ordered extent after transaction abort\nIf while we are doing a direct IO write a transaction abort happens, we\nmark all existing ordered extents with the BTRFS_ORDERED_IOERR flag (done\nat btrfs_destroy_ordered_extents()), and then after that if we enter\nbtrfs_split_ordered_extent() and the ordered extent has bytes left\n(meaning we have a bio that doesn't cover the whole ordered extent, see\ndetails at btrfs_extract_ordered_extent()), we will fail on the following\nassertion at btrfs_split_ordered_extent():\nASSERT(!(flags & ~BTRFS_ORDERED_TYPE_FLAGS));\nbecause the BTRFS_ORDERED_IOERR flag is set and the definition of\nBTRFS_ORDERED_TYPE_FLAGS is just the union of all flags that identify the\ntype of write (regular, nocow, prealloc, compressed, direct IO, encoded).\nFix this by returning an error from btrfs_extract_ordered_extent() if we\nfind the BTRFS_ORDERED_IOERR flag in the ordered extent. The error will\nbe the error that resulted in the transaction abort or -EIO if no\ntransaction abort happened.\nThis was recently reported by syzbot with the following trace:\nFAULT_INJECTION: forcing a failure.\nname failslab, interval 1, probability 0, space 0, times 1\nCPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nCall Trace:\n<TASK>\n__dump_stack lib/dump_stack.c:94 [inline]\ndump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\nfail_dump lib/fault-inject.c:53 [inline]\nshould_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154\nshould_failslab+0xac/0x100 mm/failslab.c:46\nslab_pre_alloc_hook mm/slub.c:4072 [inline]\nslab_alloc_node mm/slub.c:4148 [inline]\n__do_kmalloc_node mm/slub.c:4297 [inline]\n__kmalloc_noprof+0xdd/0x4c0 mm/slub.c:4310\nkmalloc_noprof include/linux/slab.h:905 [inline]\nkzalloc_noprof include/linux/slab.h:1037 [inline]\nbtrfs_chunk_alloc_add_chunk_item+0x244/0x1100 fs/btrfs/volumes.c:5742\nreserve_chunk_space+0x1ca/0x2c0 fs/btrfs/block-group.c:4292\ncheck_system_chunk fs/btrfs/block-group.c:4319 [inline]\ndo_chunk_alloc fs/btrfs/block-group.c:3891 [inline]\nbtrfs_chunk_alloc+0x77b/0xf80 fs/btrfs/block-group.c:4187\nfind_free_extent_update_loop fs/btrfs/extent-tree.c:4166 [inline]\nfind_free_extent+0x42d1/0x5810 fs/btrfs/extent-tree.c:4579\nbtrfs_reserve_extent+0x422/0x810 fs/btrfs/extent-tree.c:4672\nbtrfs_new_extent_direct fs/btrfs/direct-io.c:186 [inline]\nbtrfs_get_blocks_direct_write+0x706/0xfa0 fs/btrfs/direct-io.c:321\nbtrfs_dio_iomap_begin+0xbb7/0x1180 fs/btrfs/direct-io.c:525\niomap_iter+0x697/0xf60 fs/iomap/iter.c:90\n__iomap_dio_rw+0xeb9/0x25b0 fs/iomap/direct-io.c:702\nbtrfs_dio_write fs/btrfs/direct-io.c:775 [inline]\nbtrfs_direct_write+0x610/0xa30 fs/btrfs/direct-io.c:880\nbtrfs_do_write_iter+0x2a0/0x760 fs/btrfs/file.c:1397\ndo_iter_readv_writev+0x600/0x880\nvfs_writev+0x376/0xba0 fs/read_write.c:1050\ndo_pwritev fs/read_write.c:1146 [inline]\n__do_sys_pwritev2 fs/read_write.c:1204 [inline]\n__se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f1281f85d29\nRSP: 002b:00007f12819fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148\nRAX: ffffffffffffffda RBX: 00007f1282176080 RCX: 00007f1281f85d29\nRDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000005\nRBP: 00007f12819fe090 R08: 0000000000000000 R09: 0000000000000003\nR10: 0000000000007000 R11: 0000000000000246 R12: 0000000000000002\nR13: 0000000000000000 R14: 00007f1282176080 R15: 00007ffcb9e23328\n</TASK>\nBTRFS error (device loop0 state A): Transaction aborted (error -12)\nBTRFS: error (device loop0 state A\n---truncated---"], "name": "CVE-2025-21754", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2025-02-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21754\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21754\nhttps://lore.kernel.org/linux-cve-announce/2025022602-CVE-2025-21754-9daa@gregkh/T"], "threat_severity": "Low"}

{}