CVE-2024-56743

{"id": "CVE-2024-56743", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-12-29T12:15:07.707", "references": [{"url": "https://git.kernel.org/stable/c/3e6e3e97d64f50d9b6b1d62274f08925b1adbfc2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c840b8e1f039e90f97ca55525667eb961422f86c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-667"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfs_common: must not hold RCU while calling nfsd_file_put_local\n\nMove holding the RCU from nfs_to_nfsd_file_put_local to\nnfs_to_nfsd_net_put. It is the call to nfs_to->nfsd_serv_put that\nrequires the RCU anyway (the puts for nfsd_file and netns were\ncombined to avoid an extra indirect reference but that\nmicro-optimization isn't possible now).\n\nThis fixes xfstests generic/013 and it triggering:\n\n\"Voluntary context switch within RCU read-side critical section!\"\n\n[ 143.545738] Call Trace:\n[ 143.546206] <TASK>\n[ 143.546625] ? show_regs+0x6d/0x80\n[ 143.547267] ? __warn+0x91/0x140\n[ 143.547951] ? rcu_note_context_switch+0x496/0x5d0\n[ 143.548856] ? report_bug+0x193/0x1a0\n[ 143.549557] ? handle_bug+0x63/0xa0\n[ 143.550214] ? exc_invalid_op+0x1d/0x80\n[ 143.550938] ? asm_exc_invalid_op+0x1f/0x30\n[ 143.551736] ? rcu_note_context_switch+0x496/0x5d0\n[ 143.552634] ? wakeup_preempt+0x62/0x70\n[ 143.553358] __schedule+0xaa/0x1380\n[ 143.554025] ? _raw_spin_unlock_irqrestore+0x12/0x40\n[ 143.554958] ? try_to_wake_up+0x1fe/0x6b0\n[ 143.555715] ? wake_up_process+0x19/0x20\n[ 143.556452] schedule+0x2e/0x120\n[ 143.557066] schedule_preempt_disabled+0x19/0x30\n[ 143.557933] rwsem_down_read_slowpath+0x24d/0x4a0\n[ 143.558818] ? xfs_efi_item_format+0x50/0xc0 [xfs]\n[ 143.559894] down_read+0x4e/0xb0\n[ 143.560519] xlog_cil_commit+0x1b2/0xbc0 [xfs]\n[ 143.561460] ? _raw_spin_unlock+0x12/0x30\n[ 143.562212] ? xfs_inode_item_precommit+0xc7/0x220 [xfs]\n[ 143.563309] ? xfs_trans_run_precommits+0x69/0xd0 [xfs]\n[ 143.564394] __xfs_trans_commit+0xb5/0x330 [xfs]\n[ 143.565367] xfs_trans_roll+0x48/0xc0 [xfs]\n[ 143.566262] xfs_defer_trans_roll+0x57/0x100 [xfs]\n[ 143.567278] xfs_defer_finish_noroll+0x27a/0x490 [xfs]\n[ 143.568342] xfs_defer_finish+0x1a/0x80 [xfs]\n[ 143.569267] xfs_bunmapi_range+0x4d/0xb0 [xfs]\n[ 143.570208] xfs_itruncate_extents_flags+0x13d/0x230 [xfs]\n[ 143.571353] xfs_free_eofblocks+0x12e/0x190 [xfs]\n[ 143.572359] xfs_file_release+0x12d/0x140 [xfs]\n[ 143.573324] __fput+0xe8/0x2d0\n[ 143.573922] __fput_sync+0x1d/0x30\n[ 143.574574] nfsd_filp_close+0x33/0x60 [nfsd]\n[ 143.575430] nfsd_file_free+0x96/0x150 [nfsd]\n[ 143.576274] nfsd_file_put+0xf7/0x1a0 [nfsd]\n[ 143.577104] nfsd_file_put_local+0x18/0x30 [nfsd]\n[ 143.578070] nfs_close_local_fh+0x101/0x110 [nfs_localio]\n[ 143.579079] __put_nfs_open_context+0xc9/0x180 [nfs]\n[ 143.580031] nfs_file_clear_open_context+0x4a/0x60 [nfs]\n[ 143.581038] nfs_file_release+0x3e/0x60 [nfs]\n[ 143.581879] __fput+0xe8/0x2d0\n[ 143.582464] __fput_sync+0x1d/0x30\n[ 143.583108] __x64_sys_close+0x41/0x80\n[ 143.583823] x64_sys_call+0x189a/0x20d0\n[ 143.584552] do_syscall_64+0x64/0x170\n[ 143.585240] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[ 143.586185] RIP: 0033:0x7f3c5153efd7"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfs_common: no debe mantener la RCU mientras se llama a nfsd_file_put_local Mueva la retenci\u00f3n de la RCU de nfs_to_nfsd_file_put_local a nfs_to_nfsd_net_put. Es la llamada a nfs_to-&gt;nfsd_serv_put la que requiere la RCU de todos modos (las puts para nfsd_file y netns se combinaron para evitar una referencia indirecta adicional, pero esa microoptimizaci\u00f3n ahora no es posible). Esto corrige xfstests generic/013 y su activaci\u00f3n: \"\u00a1Cambio de contexto voluntario dentro de la secci\u00f3n cr\u00edtica del lado de lectura de RCU!\" [ 143.545738] Seguimiento de llamadas: [ 143.546206] [ 143.546625] ? asm_exc_invalid_op+0x1f/0x30 [ 143.551736] ? rcu_note_context_switch+0x496/0x5d0 [ 143.552634] ? wakeup_preempt+0x62/0x70 [ 143.553358] ? __schedule+0xaa/0x1380 [ 143.554025] ? _raw_spin_unlock_irqrestore+0x12/0x40 [ 143.554958] ? try_to_wake_up+0x1fe/0x6b0 [ 143.555715] ? xfs_efi_item_format+0x50/0xc0 [xfs] [ 143.559894] lectura_bajada+0x4e/0xb0 [ 143.560519] xlog_cil_commit+0x1b2/0xbc0 [xfs] [ 143.561460] ? xfs_inode_item_precommit+0xc7/0x220 [xfs] [ 143.563309] ? xfs_trans_run_precommits+0x69/0xd0 [xfs] [ 143.564394] __xfs_trans_commit+0xb5/0x330 [xfs] [ 143.565367] xfs_trans_roll+0x48/0xc0 [xfs] [ 143.566262] xfs_defer_trans_roll+0x57/0x100 [xfs] [ 143.567278] xfs_defer_finish_noroll+0x27a/0x490 [xfs] [ 143.568342] xfs_defer_finish+0x1a/0x80 [xfs] [ 143.569267] xfs_bunmapi_range+0x4d/0xb0 [xfs] [ 143.570208] xfs_itruncate_extents_flags+0x13d/0x230 [xfs] [ 143.571353] xfs_free_eofblocks+0x12e/0x190 [xfs] [ 143.572359] xfs_file_release+0x12d/0x140 [xfs] [ 143.573324] __fput+0xe8/0x2d0 [ 143.573922] __fput_sync+0x1d/0x30 [ 143.574574] nfsd_filp_close+0x33/0x60 [nfsd] [ 143.575430] nfsd_file_free+0x96/0x150 [nfsd] [ 143.576274] nfsd_file_put+0xf7/0x1a0 [nfsd] [ 143.577104] nfsd_file_put_local+0x18/0x30 [nfsd] [ 143.578070] nfs_close_local_fh+0x101/0x110 [nfs_localio] [ 143.579079] __put_nfs_open_context+0xc9/0x180 [nfs] [ 143.580031] nfs_file_clear_open_context+0x4a/0x60 [nfs] [ 143.581038] liberaci\u00f3n_archivo_nfs+0x3e/0x60 [nfs] [ 143.581879] __fput+0xe8/0x2d0 [ 143.582464] __fput_sync+0x1d/0x30 [ 143.583108] __x64_sys_close+0x41/0x80 [ 143.583823] llamada_sys_x64+0x189a/0x20d0 [ 143.584552] llamada_sys_64+0x64/0x170 [ 143.585240] entrada_SYSCALL_64_despu\u00e9s_hwframe+0x76/0x7e [ 143.586185] Descanse en paz: 0033:0x7f3c5153efd7"}], "lastModified": "2025-01-07T22:18:53.437", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D8882B1B-2ABC-4838-AC1D-DBDBB5764776", "versionEndExcluding": "6.12.2", "versionStartIncluding": "6.12"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}