[BUG] kernel BUG in mark_free_pages

[Farhad Alemi]

Hello,

As part of the kernel research at ASU's SEFCOM
lab, we hit the crash below. Crash reports can be found here:

  https://github.com/farhad-alemi/public_bug_reports/tree/main/181-kernel-bug-in-mark-free-pages/

  page:ffffea0004c00000 is uninitialized and poisoned
  page dumped because: VM_BUG_ON_PAGE(PagePoisoned(page))
  kernel BUG at ./include/linux/mm.h:2265!
  Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
  RIP: 0010:page_to_nid include/linux/mm.h:2265 [inline]
  RIP: 0010:mark_free_pages+0x49e/0x4b0 kernel/power/snapshot.c:1265
  Call Trace:
   mark_free_pages+0x49e/0x4b0 kernel/power/snapshot.c:1265
   count_data_pages kernel/power/snapshot.c:1417 [inline]
   hibernate_preallocate_memory+0x14f/0x750 kernel/power/snapshot.c:1859
   hibernation_snapshot+0xaa/0x3d0 kernel/power/hibernate.c:429
   hibernate+0x28f/0x680 kernel/power/hibernate.c:839
   state_store+0x234/0x290 kernel/power/main.c:821
   kernfs_fop_write_iter+0x2fa/0x480 fs/kernfs/file.c:352
   ksys_write+0x14d/0x260 fs/read_write.c:740

Our reproducer.c is available upon request.

Happy to test a patch if that would help.

Regards,