cve-2021-47090
Vulnerability from cvelistv5
Published
2024-03-04 18:10
Modified
2024-12-19 07:35
Severity ?
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1f207076740101fed87074a6bc924dbe806f08a5
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2a57d83c78f889bf3f54eede908d0643c40d5418
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c691e7575eff76e563b0199c23ec46bd454f43e3
Impacted products
Vendor Product Version
Linux Linux Version: 5.10
Show details on NVD website

To clipboard 

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    "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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