CVE-2021-47090
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47090
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47090.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47090
- Downstream
- Published
- 2024-03-04T18:15:07Z
- Modified
- 2025-08-09T19:01:26Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
mm/hwpoison: clear MFCOUNTINCREASED before retrying getanypage()
Hulk Robot reported a panic in putpagetestzero() when testing madvise() with MADVSOFTOFFLINE. The BUG() is triggered when retrying getanypage(). This is because we keep MFCOUNTINCREASED 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