mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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107 lines
11 KiB
JSON
107 lines
11 KiB
JSON
{
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"id": "CVE-2021-47552",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2024-05-24T15:15:20.000",
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"lastModified": "2025-01-06T20:47:35.617",
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"vulnStatus": "Analyzed",
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"cveTags": [],
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: cancel blk-mq dispatch work in both blk_cleanup_queue and disk_release()\n\nFor avoiding to slow down queue destroy, we don't call\nblk_mq_quiesce_queue() in blk_cleanup_queue(), instead of delaying to\ncancel dispatch work in blk_release_queue().\n\nHowever, this way has caused kernel oops[1], reported by Changhui. The log\nshows that scsi_device can be freed before running blk_release_queue(),\nwhich is expected too since scsi_device is released after the scsi disk\nis closed and the scsi_device is removed.\n\nFixes the issue by canceling blk-mq dispatch work in both blk_cleanup_queue()\nand disk_release():\n\n1) when disk_release() is run, the disk has been closed, and any sync\ndispatch activities have been done, so canceling dispatch work is enough to\nquiesce filesystem I/O dispatch activity.\n\n2) in blk_cleanup_queue(), we only focus on passthrough request, and\npassthrough request is always explicitly allocated & freed by\nits caller, so once queue is frozen, all sync dispatch activity\nfor passthrough request has been done, then it is enough to just cancel\ndispatch work for avoiding any dispatch activity.\n\n[1] kernel panic log\n[12622.769416] BUG: kernel NULL pointer dereference, address: 0000000000000300\n[12622.777186] #PF: supervisor read access in kernel mode\n[12622.782918] #PF: error_code(0x0000) - not-present page\n[12622.788649] PGD 0 P4D 0\n[12622.791474] Oops: 0000 [#1] PREEMPT SMP PTI\n[12622.796138] CPU: 10 PID: 744 Comm: kworker/10:1H Kdump: loaded Not tainted 5.15.0+ #1\n[12622.804877] Hardware name: Dell Inc. PowerEdge R730/0H21J3, BIOS 1.5.4 10/002/2015\n[12622.813321] Workqueue: kblockd blk_mq_run_work_fn\n[12622.818572] RIP: 0010:sbitmap_get+0x75/0x190\n[12622.823336] Code: 85 80 00 00 00 41 8b 57 08 85 d2 0f 84 b1 00 00 00 45 31 e4 48 63 cd 48 8d 1c 49 48 c1 e3 06 49 03 5f 10 4c 8d 6b 40 83 f0 01 <48> 8b 33 44 89 f2 4c 89 ef 0f b6 c8 e8 fa f3 ff ff 83 f8 ff 75 58\n[12622.844290] RSP: 0018:ffffb00a446dbd40 EFLAGS: 00010202\n[12622.850120] RAX: 0000000000000001 RBX: 0000000000000300 RCX: 0000000000000004\n[12622.858082] RDX: 0000000000000006 RSI: 0000000000000082 RDI: ffffa0b7a2dfe030\n[12622.866042] RBP: 0000000000000004 R08: 0000000000000001 R09: ffffa0b742721334\n[12622.874003] R10: 0000000000000008 R11: 0000000000000008 R12: 0000000000000000\n[12622.881964] R13: 0000000000000340 R14: 0000000000000000 R15: ffffa0b7a2dfe030\n[12622.889926] FS: 0000000000000000(0000) GS:ffffa0baafb40000(0000) knlGS:0000000000000000\n[12622.898956] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[12622.905367] CR2: 0000000000000300 CR3: 0000000641210001 CR4: 00000000001706e0\n[12622.913328] Call Trace:\n[12622.916055] <TASK>\n[12622.918394] scsi_mq_get_budget+0x1a/0x110\n[12622.922969] __blk_mq_do_dispatch_sched+0x1d4/0x320\n[12622.928404] ? pick_next_task_fair+0x39/0x390\n[12622.933268] __blk_mq_sched_dispatch_requests+0xf4/0x140\n[12622.939194] blk_mq_sched_dispatch_requests+0x30/0x60\n[12622.944829] __blk_mq_run_hw_queue+0x30/0xa0\n[12622.949593] process_one_work+0x1e8/0x3c0\n[12622.954059] worker_thread+0x50/0x3b0\n[12622.958144] ? rescuer_thread+0x370/0x370\n[12622.962616] kthread+0x158/0x180\n[12622.966218] ? set_kthread_struct+0x40/0x40\n[12622.970884] ret_from_fork+0x22/0x30\n[12622.974875] </TASK>\n[12622.977309] Modules linked in: scsi_debug rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs sunrpc dm_multipath intel_rapl_msr intel_rapl_common dell_wmi_descriptor sb_edac rfkill video x86_pkg_temp_thermal intel_powerclamp dcdbas coretemp kvm_intel kvm mgag200 irqbypass i2c_algo_bit rapl drm_kms_helper ipmi_ssif intel_cstate intel_uncore syscopyarea sysfillrect sysimgblt fb_sys_fops pcspkr cec mei_me lpc_ich mei ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter drm fuse xfs libcrc32c sr_mod cdrom sd_mod t10_pi sg ixgbe ahci libahci crct10dif_pclmul crc32_pclmul crc32c_intel libata megaraid_sas ghash_clmulni_intel tg3 wdat_w\n---truncated---"
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},
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{
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"lang": "es",
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk-mq: cancela el trabajo de env\u00edo de blk-mq tanto en blk_cleanup_queue como en disk_release() Para evitar ralentizar la destrucci\u00f3n de la cola, no llamamos a blk_mq_quiesce_queue() en blk_cleanup_queue(). en lugar de retrasar la cancelaci\u00f3n del trabajo de env\u00edo en blk_release_queue(). Sin embargo, esta forma ha provocado errores en el kernel[1], seg\u00fan inform\u00f3 Changhui. El registro muestra que scsi_device se puede liberar antes de ejecutar blk_release_queue(), lo cual tambi\u00e9n se espera ya que scsi_device se libera despu\u00e9s de que se cierra el disco scsi y se elimina scsi_device. Soluciona el problema cancelando el trabajo de env\u00edo de blk-mq tanto en blk_cleanup_queue() como en disk_release(): 1) cuando se ejecuta disk_release(), el disco se ha cerrado y se han realizado todas las actividades de env\u00edo de sincronizaci\u00f3n, por lo que cancelar el trabajo de env\u00edo es suficiente para inmovilizar la actividad de env\u00edo de E/S del sistema de archivos. 2) en blk_cleanup_queue(), solo nos centramos en la solicitud de paso a trav\u00e9s, y la persona que llama siempre asigna y libera expl\u00edcitamente la solicitud de paso a trav\u00e9s, por lo que una vez que la cola se congela, se ha realizado toda la actividad de env\u00edo de sincronizaci\u00f3n para la solicitud de paso a trav\u00e9s, entonces es suficiente con simplemente cancelar el trabajo de despacho para evitar cualquier actividad de despacho. [1] registro de p\u00e1nico del kernel [12622.769416] ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000300 [12622.777186] #PF: acceso de lectura del supervisor en modo kernel [12622.782918] #PF: c\u00f3digo de error (0x0000) - p\u00e1gina no presente [12622.788649] re 0 P4D 0 [12622.791474] Ups: 0000 [#1] PREEMPT SMP PTI [12622.796138] CPU: 10 PID: 744 Comm: kworker/10:1H Kdump: cargado No contaminado 5.15.0+ #1 [12622.804877] Nombre de hardware: Dell Inc. PowerEdge R730/0H21J3, BIOS 1.5.4 10/002/2015 [12622.813321] Cola de trabajo: kblockd blk_mq_run_work_fn [12622.818572] RIP: 0010:sbitmap_get+0x75/0x190 [12622.823336] C\u00f3digo: 85 80 00 00 00 41 8b 57 08 85 d2 0f 84 b1 00 00 00 45 31 e4 48 63 cd 48 8d 1c 49 48 c1 e3 06 49 03 5f 10 4c 8d 6b 40 83 f0 01 <48> 8b 33 44 89 f2 4c 89 ef 0f b6 c8 e 8 fa f3 ff ff 83 f8 ff 75 58 [12622.844290] RSP: 0018:ffffb00a446dbd40 EFLAGS: 00010202 [12622.850120] RAX: 00000000000000001 RBX: 0000000000000300 0000000000000004 [12622.858082] RDX: 0000000000000006 RSI: 0000000000000082 RDI: ffffa0b7a2dfe030 [12622.866042] RBP: 0000000000000004 8: 0000000000000001 R09: ffffa0b742721334 [12622.874003] R10: 0000000000000008 R11: 0000000000000008 R12: 00000000000000000 [12622.881964] R13: 0000340 R14: 0000000000000000 R15: ffffa0b7a2dfe030 [12622.889926] FS: 0000000000000000(0000) GS:ffffa0baafb40000(0000) knlGS:000000000000000 00 [12622.898956] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [12622.905367] CR2: 0000000000000300 CR3: 0000000641210001 CR4: 00000000001706e0 [12622.913 328] Seguimiento de llamadas: [12622.916055] [12622.918394] scsi_mq_get_budget+0x1a/0x110 [12622.922969] __blk_mq_do_dispatch_sched+0x1d4/0x320 [12622.928404] ? pick_next_task_fair+0x39/0x390 [12622.933268] __blk_mq_sched_dispatch_requests+0xf4/0x140 [12622.939194] blk_mq_sched_dispatch_requests+0x30/0x60 [12622.944829] q_run_hw_queue+0x30/0xa0 [12622.949593] proceso_one_work+0x1e8/0x3c0 [12622.954059] trabajador_thread+0x50/0x3b0 [12622.958144] ? hilo_rescate+0x370/0x370 [12622.962616] kthread+0x158/0x180 [12622.966218] ? set_kthread_struct+0x40/0x40 [12622.970884] ret_from_fork+0x22/0x30 [12622.974875] [12622.977309] M\u00f3dulos vinculados en: scsi_debug rpcsec_gss_krb5 auth_rpcgss nfsv4 solucionador nfs lockd gracia fscache netfs sunrpc dm_multipath intel_rapl_msr intel_rapl_common dell_wmi_descriptor sb_edac rfkill video x86_pkg_temp_thermal intel_powerclamp dcdbas coretemp kvm_intel kvm mgag200 irqbypass i2c_algo_bit rapl drm_kms_helper ipmi_ssif intel_cstate intel_uncore syscopyarea ---truncado---"
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}
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],
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"metrics": {
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"cvssMetricV31": [
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{
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"source": "nvd@nist.gov",
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"type": "Primary",
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"cvssData": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 5.5,
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"baseSeverity": "MEDIUM",
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"availabilityImpact": "HIGH"
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},
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"exploitabilityScore": 1.8,
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"impactScore": 3.6
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}
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]
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},
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"weaknesses": [
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{
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"source": "nvd@nist.gov",
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"type": "Primary",
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"description": [
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{
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"lang": "en",
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"value": "CWE-476"
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}
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]
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}
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],
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"configurations": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "5.15.6",
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"matchCriteriaId": "8A9D3A0C-7C16-4DE1-9115-F24F38C1D07F"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*",
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"matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2a19b28f7929866e1cec92a3619f4de9f2d20005",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"tags": [
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"Patch"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/e03513f58919d9e2bc6df765ca2c9da863d03d90",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"tags": [
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"Patch"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/2a19b28f7929866e1cec92a3619f4de9f2d20005",
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"source": "af854a3a-2127-422b-91ae-364da2661108",
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"tags": [
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"Patch"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/e03513f58919d9e2bc6df765ca2c9da863d03d90",
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"source": "af854a3a-2127-422b-91ae-364da2661108",
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"tags": [
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"Patch"
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]
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}
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]
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} |