CVE-2024-36028

In the Linux kernel, the following vulnerability has been resolved:
mm/hugetlb: fix DEBUG_LOCKS_WARN_ON(1) when dissolve_free_hugetlb_folio()
When I did memory failure tests recently, below warning occurs:
DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 8 PID: 1011 at
kernel/locking/lockdep.c:232 __lock_acquire+0xccb/0x1ca0 Modules linked in:
mce_inject hwpoison_inject CPU: 8 PID: 1011 Comm: bash Kdump: loaded Not
tainted 6.9.0-rc3-next-20240410-00012-gdb69f219f4be #3 Hardware name: QEMU
Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP:
0010:__lock_acquire+0xccb/0x1ca0 RSP: 0018:ffffa7a1c7fe3bd0 EFLAGS:
00000082 RAX: 0000000000000000 RBX: eb851eb853975fcf RCX: ffffa1ce5fc1c9c8
RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffffa1ce5fc1c9c0 RBP:
ffffa1c6865d3280 R08: ffffffffb0f570a8 R09: 0000000000009ffb R10:
0000000000000286 R11: ffffffffb0f2ad50 R12: ffffa1c6865d3d10 R13:
ffffa1c6865d3c70 R14: 0000000000000000 R15: 0000000000000004 FS:
00007ff9f32aa740(0000) GS:ffffa1ce5fc00000(0000) knlGS:0000000000000000 CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff9f3134ba0 CR3:
00000008484e4000 CR4: 00000000000006f0 Call Trace: <TASK>
lock_acquire+0xbe/0x2d0 _raw_spin_lock_irqsave+0x3a/0x60
hugepage_subpool_put_pages.part.0+0xe/0xc0 free_huge_folio+0x253/0x3f0
dissolve_free_huge_page+0x147/0x210 __page_handle_poison+0x9/0x70
memory_failure+0x4e6/0x8c0 hard_offline_page_store+0x55/0xa0
kernfs_fop_write_iter+0x12c/0x1d0 vfs_write+0x380/0x540
ksys_write+0x64/0xe0 do_syscall_64+0xbc/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff9f3114887 RSP:
002b:00007ffecbacb458 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX:
ffffffffffffffda RBX: 000000000000000c RCX: 00007ff9f3114887 RDX:
000000000000000c RSI: 0000564494164e10 RDI: 0000000000000001 RBP:
0000564494164e10 R08: 00007ff9f31d1460 R09: 000000007fffffff R10:
0000000000000000 R11: 0000000000000246 R12: 000000000000000c R13:
00007ff9f321b780 R14: 00007ff9f3217600 R15: 00007ff9f3216a00 </TASK> Kernel
panic - not syncing: kernel: panic_on_warn set … CPU: 8 PID: 1011 Comm:
bash Kdump: loaded Not tainted 6.9.0-rc3-next-20240410-00012-gdb69f219f4be
#3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK>
panic+0x326/0x350 check_panic_on_warn+0x4f/0x50 __warn+0x98/0x190
report_bug+0x18e/0x1a0 handle_bug+0x3d/0x70 exc_invalid_op+0x18/0x70
asm_exc_invalid_op+0x1a/0x20 RIP: 0010:__lock_acquire+0xccb/0x1ca0 RSP:
0018:ffffa7a1c7fe3bd0 EFLAGS: 00000082 RAX: 0000000000000000 RBX:
eb851eb853975fcf RCX: ffffa1ce5fc1c9c8 RDX: 00000000ffffffd8 RSI:
0000000000000027 RDI: ffffa1ce5fc1c9c0 RBP: ffffa1c6865d3280 R08:
ffffffffb0f570a8 R09: 0000000000009ffb R10: 0000000000000286 R11:
ffffffffb0f2ad50 R12: ffffa1c6865d3d10 R13: ffffa1c6865d3c70 R14:
0000000000000000 R15: 0000000000000004 lock_acquire+0xbe/0x2d0
_raw_spin_lock_irqsave+0x3a/0x60 hugepage_subpool_put_pages.part.0+0xe/0xc0
free_huge_folio+0x253/0x3f0 dissolve_free_huge_page+0x147/0x210
__page_handle_poison+0x9/0x70 memory_failure+0x4e6/0x8c0
hard_offline_page_store+0x55/0xa0 kernfs_fop_write_iter+0x12c/0x1d0
vfs_write+0x380/0x540 ksys_write+0x64/0xe0 do_syscall_64+0xbc/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff9f3114887 RSP:
002b:00007ffecbacb458 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX:
ffffffffffffffda RBX: 000000000000000c RCX: 00007ff9f3114887 RDX:
000000000000000c RSI: 0000564494164e10 RDI: 0000000000000001 RBP:
0000564494164e10 R08: 00007ff9f31d1460 R09: 000000007fffffff R10:
0000000000000000 R11: 0000000000000246 R12: 000000000000000c R13:
00007ff9f321b780 R14: 00007ff9f3217600 R15: 00007ff9f3216a00 </TASK> After
git bisecting and digging into the code, I believe the root cause is that
_deferred_list field of folio is unioned with _hugetlb_subpool field. In
__update_and_free_hugetlb_folio(), folio->deferred —truncated—