cve/2024/CVE-2024-39298.md

### [CVE-2024-39298](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39298)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=6.0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=ceaf8fbea79a854373b9fc03c9fde98eb8712725%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=blue)

### Description

In the Linux kernel, the following vulnerability has been resolved:mm/memory-failure: fix handling of dissolved but not taken off from buddy pagesWhen I did memory failure tests recently, below panic occurs:page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8cee00flags: 0x6fffe0000000000(node=1|zone=2|lastcpupid=0x7fff)raw: 06fffe0000000000 dead000000000100 dead000000000122 0000000000000000raw: 0000000000000000 0000000000000009 00000000ffffffff 0000000000000000page dumped because: VM_BUG_ON_PAGE(!PageBuddy(page))------------[ cut here ]------------kernel BUG at include/linux/page-flags.h:1009!invalid opcode: 0000 [#1] PREEMPT SMP NOPTIRIP: 0010:__del_page_from_free_list+0x151/0x180RSP: 0018:ffffa49c90437998 EFLAGS: 00000046RAX: 0000000000000035 RBX: 0000000000000009 RCX: ffff8dd8dfd1c9c8RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff8dd8dfd1c9c0RBP: ffffd901233b8000 R08: ffffffffab5511f8 R09: 0000000000008c69R10: 0000000000003c15 R11: ffffffffab5511f8 R12: ffff8dd8fffc0c80R13: 0000000000000001 R14: ffff8dd8fffc0c80 R15: 0000000000000009FS:  00007ff916304740(0000) GS:ffff8dd8dfd00000(0000) knlGS:0000000000000000CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033CR2: 000055eae50124c8 CR3: 00000008479e0000 CR4: 00000000000006f0Call Trace: <TASK> __rmqueue_pcplist+0x23b/0x520 get_page_from_freelist+0x26b/0xe40 __alloc_pages_noprof+0x113/0x1120 __folio_alloc_noprof+0x11/0xb0 alloc_buddy_hugetlb_folio.isra.0+0x5a/0x130 __alloc_fresh_hugetlb_folio+0xe7/0x140 alloc_pool_huge_folio+0x68/0x100 set_max_huge_pages+0x13d/0x340 hugetlb_sysctl_handler_common+0xe8/0x110 proc_sys_call_handler+0x194/0x280 vfs_write+0x387/0x550 ksys_write+0x64/0xe0 do_syscall_64+0xc2/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7fRIP: 0033:0x7ff916114887RSP: 002b:00007ffec8a2fd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001RAX: ffffffffffffffda RBX: 000055eae500e350 RCX: 00007ff916114887RDX: 0000000000000004 RSI: 000055eae500e390 RDI: 0000000000000003RBP: 000055eae50104c0 R08: 0000000000000000 R09: 000055eae50104c0R10: 0000000000000077 R11: 0000000000000246 R12: 0000000000000004R13: 0000000000000004 R14: 00007ff916216b80 R15: 00007ff916216a00 </TASK>Modules linked in: mce_inject hwpoison_inject---[ end trace 0000000000000000 ]---And before the panic, there had an warning about bad page state:BUG: Bad page state in process page-types  pfn:8cee00page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8cee00flags: 0x6fffe0000000000(node=1|zone=2|lastcpupid=0x7fff)page_type: 0xffffff7f(buddy)raw: 06fffe0000000000 ffffd901241c0008 ffffd901240f8008 0000000000000000raw: 0000000000000000 0000000000000009 00000000ffffff7f 0000000000000000page dumped because: nonzero mapcountModules linked in: mce_inject hwpoison_injectCPU: 8 PID: 154211 Comm: page-types Not tainted 6.9.0-rc4-00499-g5544ec3178e2-dirty #22Call Trace: <TASK> dump_stack_lvl+0x83/0xa0 bad_page+0x63/0xf0 free_unref_page+0x36e/0x5c0 unpoison_memory+0x50b/0x630 simple_attr_write_xsigned.constprop.0.isra.0+0xb3/0x110 debugfs_attr_write+0x42/0x60 full_proxy_write+0x5b/0x80 vfs_write+0xcd/0x550 ksys_write+0x64/0xe0 do_syscall_64+0xc2/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7fRIP: 0033:0x7f189a514887RSP: 002b:00007ffdcd899718 EFLAGS: 00000246 ORIG_RAX: 0000000000000001RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f189a514887RDX: 0000000000000009 RSI: 00007ffdcd899730 RDI: 0000000000000003RBP: 00007ffdcd8997a0 R08: 0000000000000000 R09: 00007ffdcd8994b2R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdcda199a8R13: 0000000000404af1 R14: 000000000040ad78 R15: 00007f189a7a5040 </TASK>The root cause should be the below race: memory_failure  try_memory_failure_hugetlb   me_huge_page    __page_handle_poison     dissolve_free_hugetlb_folio     drain_all_pages -- Buddy page can be isolated e.g. for compaction.     take_page_off_buddy -- Failed as page is not in the ---truncated---

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds