{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47178", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.112Z", "datePublished": "2024-03-25T09:16:28.024Z", "dateUpdated": "2024-11-04T12:00:55.604Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:00:55.604Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: core: Avoid smp_processor_id() in preemptible code\n\nThe BUG message \"BUG: using smp_processor_id() in preemptible [00000000]\ncode\" was observed for TCMU devices with kernel config DEBUG_PREEMPT.\n\nThe message was observed when blktests block/005 was run on TCMU devices\nwith fileio backend or user:zbc backend [1]. The commit 1130b499b4a7\n(\"scsi: target: tcm_loop: Use LIO wq cmd submission helper\") triggered the\nsymptom. The commit modified work queue to handle commands and changed\n'current->nr_cpu_allowed' at smp_processor_id() call.\n\nThe message was also observed at system shutdown when TCMU devices were not\ncleaned up [2]. The function smp_processor_id() was called in SCSI host\nwork queue for abort handling, and triggered the BUG message. This symptom\nwas observed regardless of the commit 1130b499b4a7 (\"scsi: target:\ntcm_loop: Use LIO wq cmd submission helper\").\n\nTo avoid the preemptible code check at smp_processor_id(), get CPU ID with\nraw_smp_processor_id() instead. The CPU ID is used for performance\nimprovement then thread move to other CPU will not affect the code.\n\n[1]\n\n[ 56.468103] run blktests block/005 at 2021-05-12 14:16:38\n[ 57.369473] check_preemption_disabled: 85 callbacks suppressed\n[ 57.369480] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1511\n[ 57.369506] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1510\n[ 57.369512] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1506\n[ 57.369552] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369606] CPU: 4 PID: 1506 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.369613] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.369617] Call Trace:\n[ 57.369621] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1507\n[ 57.369628] dump_stack+0x6d/0x89\n[ 57.369642] check_preemption_disabled+0xc8/0xd0\n[ 57.369628] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369655] __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369695] target_init_cmd+0x76/0x90 [target_core_mod]\n[ 57.369732] tcm_loop_queuecommand+0x109/0x210 [tcm_loop]\n[ 57.369744] scsi_queue_rq+0x38e/0xc40\n[ 57.369761] __blk_mq_try_issue_directly+0x109/0x1c0\n[ 57.369779] blk_mq_try_issue_directly+0x43/0x90\n[ 57.369790] blk_mq_submit_bio+0x4e5/0x5d0\n[ 57.369812] submit_bio_noacct+0x46e/0x4e0\n[ 57.369830] __blkdev_direct_IO_simple+0x1a3/0x2d0\n[ 57.369859] ? set_init_blocksize.isra.0+0x60/0x60\n[ 57.369880] generic_file_read_iter+0x89/0x160\n[ 57.369898] blkdev_read_iter+0x44/0x60\n[ 57.369906] new_sync_read+0x102/0x170\n[ 57.369929] vfs_read+0xd4/0x160\n[ 57.369941] __x64_sys_pread64+0x6e/0xa0\n[ 57.369946] ? lockdep_hardirqs_on+0x79/0x100\n[ 57.369958] do_syscall_64+0x3a/0x70\n[ 57.369965] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 57.369973] RIP: 0033:0x7f7ed4c1399f\n[ 57.369979] Code: 08 89 3c 24 48 89 4c 24 18 e8 7d f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 cd f3 ff ff 48 8b\n[ 57.369983] RSP: 002b:00007ffd7918c580 EFLAGS: 00000293 ORIG_RAX: 0000000000000011\n[ 57.369990] RAX: ffffffffffffffda RBX: 00000000015b4540 RCX: 00007f7ed4c1399f\n[ 57.369993] RDX: 0000000000001000 RSI: 00000000015de000 RDI: 0000000000000009\n[ 57.369996] RBP: 00000000015b4540 R08: 0000000000000000 R09: 0000000000000001\n[ 57.369999] R10: 0000000000e5c000 R11: 0000000000000293 R12: 00007f7eb5269a70\n[ 57.370002] R13: 0000000000000000 R14: 0000000000001000 R15: 00000000015b4568\n[ 57.370031] CPU: 7 PID: 1507 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.370036] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.370039] Call Trace:\n[ 57.370045] dump_stack+0x6d/0x89\n[ 57.370056] ch\n---truncated---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/target/target_core_transport.c"], "versions": [{"version": "008b936bbde3", "lessThan": "a222d2794c53", "status": "affected", "versionType": "git"}, {"version": "1526d9f10c61", "lessThan": "a20b6eaf4f35", "status": "affected", "versionType": "git"}, {"version": "1526d9f10c61", "lessThan": "70ca3c57ff91", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/target/target_core_transport.c"], "versions": [{"version": "5.11", "status": "affected"}, {"version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.9", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/a222d2794c53f8165de20aa91b39e35e4b72bce9"}, {"url": "https://git.kernel.org/stable/c/a20b6eaf4f35046a429cde57bee7eb5f13d6857f"}, {"url": "https://git.kernel.org/stable/c/70ca3c57ff914113f681e657634f7fbfa68e1ad1"}], "title": "scsi: target: core: Avoid smp_processor_id() in preemptible code", "x_generator": {"engine": "bippy-9e1c9544281a"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.944Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/a222d2794c53f8165de20aa91b39e35e4b72bce9", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a20b6eaf4f35046a429cde57bee7eb5f13d6857f", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/70ca3c57ff914113f681e657634f7fbfa68e1ad1", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47178", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:54:21.876109Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:47.925Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/a222d2794c53f8165de20aa91b39e35e4b72bce9", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a20b6eaf4f35046a429cde57bee7eb5f13d6857f", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/70ca3c57ff914113f681e657634f7fbfa68e1ad1", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.944Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47178", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:54:21.876109Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:18.789Z"}}], "cna": {"title": "scsi: target: core: Avoid smp_processor_id() in preemptible code", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "008b936bbde3", "lessThan": "a222d2794c53", "versionType": "git"}, {"status": "affected", "version": "1526d9f10c61", "lessThan": "a20b6eaf4f35", "versionType": "git"}, {"status": "affected", "version": "1526d9f10c61", "lessThan": "70ca3c57ff91", "versionType": "git"}], "programFiles": ["drivers/target/target_core_transport.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"status": "unaffected", "version": "0", "lessThan": "5.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.12.9", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "semver", "lessThanOrEqual": "*"}], "programFiles": ["drivers/target/target_core_transport.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/a222d2794c53f8165de20aa91b39e35e4b72bce9"}, {"url": "https://git.kernel.org/stable/c/a20b6eaf4f35046a429cde57bee7eb5f13d6857f"}, {"url": "https://git.kernel.org/stable/c/70ca3c57ff914113f681e657634f7fbfa68e1ad1"}], "x_generator": {"engine": "bippy-c8e10e5f6187"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: core: Avoid smp_processor_id() in preemptible code\n\nThe BUG message \"BUG: using smp_processor_id() in preemptible [00000000]\ncode\" was observed for TCMU devices with kernel config DEBUG_PREEMPT.\n\nThe message was observed when blktests block/005 was run on TCMU devices\nwith fileio backend or user:zbc backend [1]. The commit 1130b499b4a7\n(\"scsi: target: tcm_loop: Use LIO wq cmd submission helper\") triggered the\nsymptom. The commit modified work queue to handle commands and changed\n'current->nr_cpu_allowed' at smp_processor_id() call.\n\nThe message was also observed at system shutdown when TCMU devices were not\ncleaned up [2]. The function smp_processor_id() was called in SCSI host\nwork queue for abort handling, and triggered the BUG message. This symptom\nwas observed regardless of the commit 1130b499b4a7 (\"scsi: target:\ntcm_loop: Use LIO wq cmd submission helper\").\n\nTo avoid the preemptible code check at smp_processor_id(), get CPU ID with\nraw_smp_processor_id() instead. The CPU ID is used for performance\nimprovement then thread move to other CPU will not affect the code.\n\n[1]\n\n[ 56.468103] run blktests block/005 at 2021-05-12 14:16:38\n[ 57.369473] check_preemption_disabled: 85 callbacks suppressed\n[ 57.369480] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1511\n[ 57.369506] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1510\n[ 57.369512] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1506\n[ 57.369552] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369606] CPU: 4 PID: 1506 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.369613] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.369617] Call Trace:\n[ 57.369621] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1507\n[ 57.369628] dump_stack+0x6d/0x89\n[ 57.369642] check_preemption_disabled+0xc8/0xd0\n[ 57.369628] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369655] __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369695] target_init_cmd+0x76/0x90 [target_core_mod]\n[ 57.369732] tcm_loop_queuecommand+0x109/0x210 [tcm_loop]\n[ 57.369744] scsi_queue_rq+0x38e/0xc40\n[ 57.369761] __blk_mq_try_issue_directly+0x109/0x1c0\n[ 57.369779] blk_mq_try_issue_directly+0x43/0x90\n[ 57.369790] blk_mq_submit_bio+0x4e5/0x5d0\n[ 57.369812] submit_bio_noacct+0x46e/0x4e0\n[ 57.369830] __blkdev_direct_IO_simple+0x1a3/0x2d0\n[ 57.369859] ? set_init_blocksize.isra.0+0x60/0x60\n[ 57.369880] generic_file_read_iter+0x89/0x160\n[ 57.369898] blkdev_read_iter+0x44/0x60\n[ 57.369906] new_sync_read+0x102/0x170\n[ 57.369929] vfs_read+0xd4/0x160\n[ 57.369941] __x64_sys_pread64+0x6e/0xa0\n[ 57.369946] ? lockdep_hardirqs_on+0x79/0x100\n[ 57.369958] do_syscall_64+0x3a/0x70\n[ 57.369965] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 57.369973] RIP: 0033:0x7f7ed4c1399f\n[ 57.369979] Code: 08 89 3c 24 48 89 4c 24 18 e8 7d f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 cd f3 ff ff 48 8b\n[ 57.369983] RSP: 002b:00007ffd7918c580 EFLAGS: 00000293 ORIG_RAX: 0000000000000011\n[ 57.369990] RAX: ffffffffffffffda RBX: 00000000015b4540 RCX: 00007f7ed4c1399f\n[ 57.369993] RDX: 0000000000001000 RSI: 00000000015de000 RDI: 0000000000000009\n[ 57.369996] RBP: 00000000015b4540 R08: 0000000000000000 R09: 0000000000000001\n[ 57.369999] R10: 0000000000e5c000 R11: 0000000000000293 R12: 00007f7eb5269a70\n[ 57.370002] R13: 0000000000000000 R14: 0000000000001000 R15: 00000000015b4568\n[ 57.370031] CPU: 7 PID: 1507 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.370036] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.370039] Call Trace:\n[ 57.370045] dump_stack+0x6d/0x89\n[ 57.370056] ch\n---truncated---"}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T11:36:15.766Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47178", "state": "PUBLISHED", "dateUpdated": "2024-11-04T11:36:15.766Z", "dateReserved": "2024-03-25T09:12:14.112Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-03-25T09:16:28.024Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: core: Avoid smp_processor_id() in preemptible code\n\nThe BUG message \"BUG: using smp_processor_id() in preemptible [00000000]\ncode\" was observed for TCMU devices with kernel config DEBUG_PREEMPT.\n\nThe message was observed when blktests block/005 was run on TCMU devices\nwith fileio backend or user:zbc backend [1]. The commit 1130b499b4a7\n(\"scsi: target: tcm_loop: Use LIO wq cmd submission helper\") triggered the\nsymptom. The commit modified work queue to handle commands and changed\n'current->nr_cpu_allowed' at smp_processor_id() call.\n\nThe message was also observed at system shutdown when TCMU devices were not\ncleaned up [2]. The function smp_processor_id() was called in SCSI host\nwork queue for abort handling, and triggered the BUG message. This symptom\nwas observed regardless of the commit 1130b499b4a7 (\"scsi: target:\ntcm_loop: Use LIO wq cmd submission helper\").\n\nTo avoid the preemptible code check at smp_processor_id(), get CPU ID with\nraw_smp_processor_id() instead. The CPU ID is used for performance\nimprovement then thread move to other CPU will not affect the code.\n\n[1]\n\n[ 56.468103] run blktests block/005 at 2021-05-12 14:16:38\n[ 57.369473] check_preemption_disabled: 85 callbacks suppressed\n[ 57.369480] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1511\n[ 57.369506] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1510\n[ 57.369512] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1506\n[ 57.369552] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369606] CPU: 4 PID: 1506 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.369613] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.369617] Call Trace:\n[ 57.369621] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1507\n[ 57.369628] dump_stack+0x6d/0x89\n[ 57.369642] check_preemption_disabled+0xc8/0xd0\n[ 57.369628] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369655] __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369695] target_init_cmd+0x76/0x90 [target_core_mod]\n[ 57.369732] tcm_loop_queuecommand+0x109/0x210 [tcm_loop]\n[ 57.369744] scsi_queue_rq+0x38e/0xc40\n[ 57.369761] __blk_mq_try_issue_directly+0x109/0x1c0\n[ 57.369779] blk_mq_try_issue_directly+0x43/0x90\n[ 57.369790] blk_mq_submit_bio+0x4e5/0x5d0\n[ 57.369812] submit_bio_noacct+0x46e/0x4e0\n[ 57.369830] __blkdev_direct_IO_simple+0x1a3/0x2d0\n[ 57.369859] ? set_init_blocksize.isra.0+0x60/0x60\n[ 57.369880] generic_file_read_iter+0x89/0x160\n[ 57.369898] blkdev_read_iter+0x44/0x60\n[ 57.369906] new_sync_read+0x102/0x170\n[ 57.369929] vfs_read+0xd4/0x160\n[ 57.369941] __x64_sys_pread64+0x6e/0xa0\n[ 57.369946] ? lockdep_hardirqs_on+0x79/0x100\n[ 57.369958] do_syscall_64+0x3a/0x70\n[ 57.369965] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 57.369973] RIP: 0033:0x7f7ed4c1399f\n[ 57.369979] Code: 08 89 3c 24 48 89 4c 24 18 e8 7d f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 cd f3 ff ff 48 8b\n[ 57.369983] RSP: 002b:00007ffd7918c580 EFLAGS: 00000293 ORIG_RAX: 0000000000000011\n[ 57.369990] RAX: ffffffffffffffda RBX: 00000000015b4540 RCX: 00007f7ed4c1399f\n[ 57.369993] RDX: 0000000000001000 RSI: 00000000015de000 RDI: 0000000000000009\n[ 57.369996] RBP: 00000000015b4540 R08: 0000000000000000 R09: 0000000000000001\n[ 57.369999] R10: 0000000000e5c000 R11: 0000000000000293 R12: 00007f7eb5269a70\n[ 57.370002] R13: 0000000000000000 R14: 0000000000001000 R15: 00000000015b4568\n[ 57.370031] CPU: 7 PID: 1507 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.370036] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.370039] Call Trace:\n[ 57.370045] dump_stack+0x6d/0x89\n[ 57.370056] ch\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: target: core: Evite smp_processor_id() en c\u00f3digo interrumpible Se observ\u00f3 el mensaje de ERROR \"ERROR: usar smp_processor_id() en c\u00f3digo interrumpible [00000000]\" para dispositivos TCMU con configuraci\u00f3n de kernel DEBUG_PREEMPT. El mensaje se observ\u00f3 cuando se ejecut\u00f3 blktests block/005 en dispositivos TCMU con backend fileio o usuario:zbc [1]. La confirmaci\u00f3n 1130b499b4a7 (\"scsi: target: tcm_loop: Use el asistente de env\u00edo LIO wq cmd\") desencaden\u00f3 el s\u00edntoma. La confirmaci\u00f3n modific\u00f3 la cola de trabajo para manejar comandos y cambi\u00f3 'current-&gt;nr_cpu_allowed' en la llamada a smp_processor_id(). El mensaje tambi\u00e9n se observ\u00f3 al apagar el sistema cuando los dispositivos TCMU no se limpiaron [2]. La funci\u00f3n smp_processor_id() fue llamada en la cola de trabajo del host SCSI para el manejo de abortos y activ\u00f3 el mensaje de ERROR. Este s\u00edntoma se observ\u00f3 independientemente de la confirmaci\u00f3n 1130b499b4a7 (\"scsi: target: tcm_loop: Use el asistente de env\u00edo LIO wq cmd\"). Para evitar la verificaci\u00f3n del c\u00f3digo interrumpible en smp_processor_id(), obtenga el ID de la CPU con raw_smp_processor_id() en su lugar. El ID de la CPU se utiliza para mejorar el rendimiento, luego el movimiento del subproceso a otra CPU no afectar\u00e1 el c\u00f3digo. [1] [56.468103] ejecute blktests block/005 el 2021-05-12 14:16:38 [57.369473] check_preemption_disabled: 85 devoluciones de llamada suprimidas [57.369480] ERROR: usar smp_processor_id() en c\u00f3digo preferente [00000000]: fio/151 1 [ 57.369506] ERROR: usar smp_processor_id() en c\u00f3digo interrumpible [00000000]: fio/1510 [57.369512] ERROR: usar smp_processor_id() en c\u00f3digo interrumpible [00000000]: fio/1506 [57.369552] la persona que llama es __target_init_cmd+0 x157/0x170 [objetivo_core_mod] [ 57.369606] CPU: 4 PID: 1506 Comm: fio Not tainted 5.13.0-rc1+ #34 [ 57.369613] Nombre del hardware: Fabricante del sistema Nombre del producto del sistema/PRIME Z270-A, BIOS 1302 15/03/2018 [ 57.369617] Seguimiento de llamadas : [57.369621] ERROR: usar smp_processor_id() en c\u00f3digo interrumpible [00000000]: fio/1507 [57.369628] dump_stack+0x6d/0x89 [57.369642] check_preemption_disabled+0xc8/0xd0 [57.369628] la persona que llama es __ target_init_cmd+0x157/0x170 [target_core_mod] [ 57.369655] __target_init_cmd+0x157/0x170 [target_core_mod] [ 57.369695] target_init_cmd+0x76/0x90 [target_core_mod] [ 57.369732] tcm_loop_queuecommand+0x109/0x210 [tcm_loop] [ 57 .369744] scsi_queue_rq+0x38e/0xc40 [ 57.369761] __blk_mq_try_issue_directly+0x109/0x1c0 [ 57.369779 ] blk_mq_try_issue_directly+0x43/0x90 [ 57.369790] blk_mq_submit_bio+0x4e5/0x5d0 [ 57.369812] submit_bio_noacct+0x46e/0x4e0 [ 57.369830] __blkdev_direct_IO_simple+0x1a3/0x2 d0 [57.369859]? set_init_blocksize.isra.0+0x60/0x60 [ 57.369880] generic_file_read_iter+0x89/0x160 [ 57.369898] blkdev_read_iter+0x44/0x60 [ 57.369906] new_sync_read+0x102/0x170 [ 57.369929 ] vfs_read+0xd4/0x160 [ 57.369941] __x64_sys_pread64+0x6e/0xa0 [ 57.369946] ? lockdep_hardirqs_on+0x79/0x100 [ 57.369958] do_syscall_64+0x3a/0x70 [ 57.369965] Entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.369973] RIP: 0033:0x7f7ed4c1399f [ 5 7.369979] C\u00f3digo: 08 89 3c 24 48 89 4c 24 18 e8 7d f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 05 &lt;48&gt; 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 cd f3 ff ff 48 8b [ 57.369983] RSP: 002b:00007ffd7918c580 EFLAGS: 00000293 ORIG_RAX: 0000000000000011 [ 57.369990] RAX: fffffffffffffffda RBX: 00000000015b4540 RCX: 00 007f7ed4c1399f [ 57.369993] RDX: 0000000000001000 RSI: 00000000015de000 RDI: 000000000000000009 [ 57.369996] RBP: 00000000015b4540 R08: 000 0000000000000 R09: 0000000000000001 [ 57.369999] R10: 0000000000e5c000 R11: 0000000000000293 R12: 00007f7eb5269a70 [ 57.370002] R13: 00000000000000000 R14: 000000000000 1000 R15: 00000000015b4568 [57.370031] CPU: 7 PID: 1507 ---truncado---"}], "id": "CVE-2021-47178", "lastModified": "2024-04-04T14:15:08.850", "metrics": {}, "published": "2024-03-25T10:15:09.267", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70ca3c57ff914113f681e657634f7fbfa68e1ad1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a20b6eaf4f35046a429cde57bee7eb5f13d6857f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a222d2794c53f8165de20aa91b39e35e4b72bce9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: scsi: target: core: Avoid smp_processor_id() in preemptible code", "id": "2271461", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2271461"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nscsi: target: core: Avoid smp_processor_id() in preemptible code\nThe BUG message \"BUG: using smp_processor_id() in preemptible [00000000]\ncode\" was observed for TCMU devices with kernel config DEBUG_PREEMPT.\nThe message was observed when blktests block/005 was run on TCMU devices\nwith fileio backend or user:zbc backend [1]. The commit 1130b499b4a7\n(\"scsi: target: tcm_loop: Use LIO wq cmd submission helper\") triggered the\nsymptom. The commit modified work queue to handle commands and changed\n'current->nr_cpu_allowed' at smp_processor_id() call.\nThe message was also observed at system shutdown when TCMU devices were not\ncleaned up [2]. The function smp_processor_id() was called in SCSI host\nwork queue for abort handling, and triggered the BUG message. This symptom\nwas observed regardless of the commit 1130b499b4a7 (\"scsi: target:\ntcm_loop: Use LIO wq cmd submission helper\").\nTo avoid the preemptible code check at smp_processor_id(), get CPU ID with\nraw_smp_processor_id() instead. The CPU ID is used for performance\nimprovement then thread move to other CPU will not affect the code.\n[1]\n[ 56.468103] run blktests block/005 at 2021-05-12 14:16:38\n[ 57.369473] check_preemption_disabled: 85 callbacks suppressed\n[ 57.369480] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1511\n[ 57.369506] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1510\n[ 57.369512] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1506\n[ 57.369552] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369606] CPU: 4 PID: 1506 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.369613] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.369617] Call Trace:\n[ 57.369621] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1507\n[ 57.369628] dump_stack+0x6d/0x89\n[ 57.369642] check_preemption_disabled+0xc8/0xd0\n[ 57.369628] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369655] __target_init_cmd+0x157/0x170 [target_core_mod]\n[ 57.369695] target_init_cmd+0x76/0x90 [target_core_mod]\n[ 57.369732] tcm_loop_queuecommand+0x109/0x210 [tcm_loop]\n[ 57.369744] scsi_queue_rq+0x38e/0xc40\n[ 57.369761] __blk_mq_try_issue_directly+0x109/0x1c0\n[ 57.369779] blk_mq_try_issue_directly+0x43/0x90\n[ 57.369790] blk_mq_submit_bio+0x4e5/0x5d0\n[ 57.369812] submit_bio_noacct+0x46e/0x4e0\n[ 57.369830] __blkdev_direct_IO_simple+0x1a3/0x2d0\n[ 57.369859] ? set_init_blocksize.isra.0+0x60/0x60\n[ 57.369880] generic_file_read_iter+0x89/0x160\n[ 57.369898] blkdev_read_iter+0x44/0x60\n[ 57.369906] new_sync_read+0x102/0x170\n[ 57.369929] vfs_read+0xd4/0x160\n[ 57.369941] __x64_sys_pread64+0x6e/0xa0\n[ 57.369946] ? lockdep_hardirqs_on+0x79/0x100\n[ 57.369958] do_syscall_64+0x3a/0x70\n[ 57.369965] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 57.369973] RIP: 0033:0x7f7ed4c1399f\n[ 57.369979] Code: 08 89 3c 24 48 89 4c 24 18 e8 7d f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 cd f3 ff ff 48 8b\n[ 57.369983] RSP: 002b:00007ffd7918c580 EFLAGS: 00000293 ORIG_RAX: 0000000000000011\n[ 57.369990] RAX: ffffffffffffffda RBX: 00000000015b4540 RCX: 00007f7ed4c1399f\n[ 57.369993] RDX: 0000000000001000 RSI: 00000000015de000 RDI: 0000000000000009\n[ 57.369996] RBP: 00000000015b4540 R08: 0000000000000000 R09: 0000000000000001\n[ 57.369999] R10: 0000000000e5c000 R11: 0000000000000293 R12: 00007f7eb5269a70\n[ 57.370002] R13: 0000000000000000 R14: 0000000000001000 R15: 00000000015b4568\n[ 57.370031] CPU: 7 PID: 1507 Comm: fio Not tainted 5.13.0-rc1+ #34\n[ 57.370036] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[ 57.370039] Call Trace:\n[ 57.370045] dump_stack+0x6d/0x89\n[ 57.370056] ch\n---truncated---"], "name": "CVE-2021-47178", "package_state": [{"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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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": "2024-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47178\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47178\nhttps://lore.kernel.org/linux-cve-announce/2024032538-CVE-2021-47178-6167@gregkh/T"], "threat_severity": "Low", "upstream_fix": "kernel 5.12.9, kernel 5.13"}