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CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-21931

hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio Commit b15c87263a69 ("hwpoison, memory_hotplug: allow hwpoisoned pages to be offlined) add page poison checks in do_migrate_range in order to make offline hwpoisoned page possible by introducing isolate_lru_page and try_to_unmap for hwpoisoned page. However folio lock must be held before calling try_to_unmap. Add it to fix this problem. Warning will be produced if folio is not locked during unmap: ------------[ cut here ]------------ kernel BUG at ./include/linux/swapops.h:400! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 4 UID: 0 PID: 411 Comm: bash Tainted: G W 6.13.0-rc1-00016-g3c434c7ee82a-dirty #41 Tainted: [W]=WARN Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : try_to_unmap_one+0xb08/0xd3c lr : try_to_unmap_one+0x3dc/0xd3c Call trace: try_to_unmap_one+0xb08/0xd3c (P) try_to_unmap_one+0x3dc/0xd3c (L) rmap_walk_anon+0xdc/0x1f8 rmap_walk+0x3c/0x58 try_to_unmap+0x88/0x90 unmap_poisoned_folio+0x30/0xa8 do_migrate_range+0x4a0/0x568 offline_pages+0x5a4/0x670 memory_block_action+0x17c/0x374 memory_subsys_offline+0x3c/0x78 device_offline+0xa4/0xd0 state_store+0x8c/0xf0 dev_attr_store+0x18/0x2c sysfs_kf_write+0x44/0x54 kernfs_fop_write_iter+0x118/0x1a8 vfs_write+0x3a8/0x4bc ksys_write+0x6c/0xf8 __arm64_sys_write+0x1c/0x28 invoke_syscall+0x44/0x100 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x30/0xd0 el0t_64_sync_handler+0xc8/0xcc el0t_64_sync+0x198/0x19c Code: f9407be0 b5fff320 d4210000 17ffff97 (d4210000) ---[ end trace 0000000000000000 ]---

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • b15c87263a69272423771118c653e9a1d0672caa to < 3926b572fd073491bde13ec42ee08ac1b337bf4daffected
  • b15c87263a69272423771118c653e9a1d0672caa to < 93df6da64b004f75d307ed08d3f0f1020280d339affected
  • b15c87263a69272423771118c653e9a1d0672caa to < 576a2f4c437c19bec7d05d05b5990f178d2b0f40affected
  • b15c87263a69272423771118c653e9a1d0672caa to < 629dfc6ba5431056701d4e44830f3409b989955aaffected
  • b15c87263a69272423771118c653e9a1d0672caa to < af288a426c3e3552b62595c6138ec6371a17dbbaaffected
  • 85ef35ab972b7484f41c3bb2bbc79de212e19129affected
  • 060853fdd434ce620dd1dd7619ede834bd33b9d0affected
  • cb1206e85df291fefde27401190329e26996c54caffected
  • 2c25071bed4b1f9c4cfb10a7914847d7069794bfaffected
  • 2c87072a3bf9bbcd747618bb2ccc3cd0da181db6affected
  • a2b977e3d9e4298d28ebe5cfff9e0859b74a7ac7affected
  • 3.16.65 to < 3.17affected
  • 4.4.170 to < 4.5affected
  • 4.9.150 to < 4.10affected
  • 4.14.93 to < 4.15affected
  • 4.19.15 to < 4.20affected
  • 4.20.2 to < 4.21affected

Linux Linux

Default version status: affected

  • 5.0affected
  • 0 to < 5.0unaffected
  • 6.1.140 to ≤ 6.1.*unaffected
  • 6.6.92 to ≤ 6.6.*unaffected
  • 6.12.19 to ≤ 6.12.*unaffected
  • 6.13.7 to ≤ 6.13.*unaffected
  • 6.14 to ≤ *unaffected

References