CVE-2021-47090
Vulnerability from cvelistv5
Published
2024-03-04 18:10
Modified
2024-12-19 07:35
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()
Hulk Robot reported a panic in put_page_testzero() when testing
madvise() with MADV_SOFT_OFFLINE. The BUG() is triggered when retrying
get_any_page(). This is because we keep MF_COUNT_INCREASED flag in
second try but the refcnt is not increased.
page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)
------------[ cut here ]------------
kernel BUG at include/linux/mm.h:737!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 5 PID: 2135 Comm: sshd Tainted: G B 5.16.0-rc6-dirty #373
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
RIP: release_pages+0x53f/0x840
Call Trace:
free_pages_and_swap_cache+0x64/0x80
tlb_flush_mmu+0x6f/0x220
unmap_page_range+0xe6c/0x12c0
unmap_single_vma+0x90/0x170
unmap_vmas+0xc4/0x180
exit_mmap+0xde/0x3a0
mmput+0xa3/0x250
do_exit+0x564/0x1470
do_group_exit+0x3b/0x100
__do_sys_exit_group+0x13/0x20
__x64_sys_exit_group+0x16/0x20
do_syscall_64+0x34/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
Modules linked in:
---[ end trace e99579b570fe0649 ]---
RIP: 0010:release_pages+0x53f/0x840
References
Impacted products
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The BUG() is triggered when retrying\nget_any_page(). This is because we keep MF_COUNT_INCREASED flag in\nsecond try but the refcnt is not increased.\n\n page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)\n ------------[ cut here ]------------\n kernel BUG at include/linux/mm.h:737!\n invalid opcode: 0000 [#1] PREEMPT SMP\n CPU: 5 PID: 2135 Comm: sshd Tainted: G B 5.16.0-rc6-dirty #373\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\n RIP: release_pages+0x53f/0x840\n Call Trace:\n free_pages_and_swap_cache+0x64/0x80\n tlb_flush_mmu+0x6f/0x220\n unmap_page_range+0xe6c/0x12c0\n unmap_single_vma+0x90/0x170\n unmap_vmas+0xc4/0x180\n exit_mmap+0xde/0x3a0\n mmput+0xa3/0x250\n do_exit+0x564/0x1470\n do_group_exit+0x3b/0x100\n __do_sys_exit_group+0x13/0x20\n __x64_sys_exit_group+0x16/0x20\n do_syscall_64+0x34/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n Modules linked in:\n ---[ end trace e99579b570fe0649 ]---\n RIP: 0010:release_pages+0x53f/0x840" } ], "providerMetadata": { "dateUpdated": "2024-12-19T07:35:02.065Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5" }, { "url": "https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3" }, { "url": "https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418" } ], "title": "mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()", "x_generator": { "engine": "bippy-5f407fcff5a0" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-47090", "datePublished": "2024-03-04T18:10:28.887Z", "dateReserved": "2024-02-29T22:33:44.300Z", "dateUpdated": "2024-12-19T07:35:02.065Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "vulnerability-lookup:meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-47090\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-04T18:15:07.610\",\"lastModified\":\"2024-11-21T06:35:22.647\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()\\n\\nHulk Robot reported a panic in put_page_testzero() when testing\\nmadvise() with MADV_SOFT_OFFLINE. The BUG() is triggered when retrying\\nget_any_page(). This is because we keep MF_COUNT_INCREASED flag in\\nsecond try but the refcnt is not increased.\\n\\n page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)\\n ------------[ cut here ]------------\\n kernel BUG at include/linux/mm.h:737!\\n invalid opcode: 0000 [#1] PREEMPT SMP\\n CPU: 5 PID: 2135 Comm: sshd Tainted: G B 5.16.0-rc6-dirty #373\\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\\n RIP: release_pages+0x53f/0x840\\n Call Trace:\\n free_pages_and_swap_cache+0x64/0x80\\n tlb_flush_mmu+0x6f/0x220\\n unmap_page_range+0xe6c/0x12c0\\n unmap_single_vma+0x90/0x170\\n unmap_vmas+0xc4/0x180\\n exit_mmap+0xde/0x3a0\\n mmput+0xa3/0x250\\n do_exit+0x564/0x1470\\n do_group_exit+0x3b/0x100\\n __do_sys_exit_group+0x13/0x20\\n __x64_sys_exit_group+0x16/0x20\\n do_syscall_64+0x34/0x80\\n entry_SYSCALL_64_after_hwframe+0x44/0xae\\n Modules linked in:\\n ---[ end trace e99579b570fe0649 ]---\\n RIP: 0010:release_pages+0x53f/0x840\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mm/hwpoison: borre MF_COUNT_INCREASED antes de volver a intentar get_any_page() Hulk Robot inform\u00f3 un p\u00e1nico en put_page_testzero() al probar madvise() con MADV_SOFT_OFFLINE. El ERROR() se activa al volver a intentar get_any_page(). Esto se debe a que mantenemos el indicador MF_COUNT_INCREASED en el segundo intento pero el refcnt no aumenta. p\u00e1gina volcada porque: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cortar aqu\u00ed ]------------ ERROR del kernel en include/linux/mm .h:737! c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] PREEMPT SMP CPU: 5 PID: 2135 Comm: sshd Contaminado: GB 5.16.0-rc6-dirty #373 Nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0- 1ubuntu1.1 01/04/2014 RIP: release_pages+0x53f/0x840 Seguimiento de llamadas: free_pages_and_swap_cache+0x64/0x80 tlb_flush_mmu+0x6f/0x220 unmap_page_range+0xe6c/0x12c0 unmap_single_vma+0x90/0x170 unmap _vmas+0xc4/0x180 salida_mmap+0xde/0x3a0 mmput+ 0xa3/0x250 do_exit+0x564/0x1470 do_group_exit+0x3b/0x100 __do_sys_exit_group+0x13/0x20 __x64_sys_exit_group+0x16/0x20 do_syscall_64+0x34/0x80 Entry_SYSCALL_64_after_hwframe+ 0x44/0xae M\u00f3dulos vinculados en: ---[ end trace e99579b570fe0649 ]--- RIP: 0010:p\u00e1ginas_de_liberaci\u00f3n+0x53f/0x840\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}" } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.