list_add corruption. next->prev should be prev (ffff88021fffa630), but was ffffea00045333e0. (next=ffffea0004532060).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:25!
invalid opcode: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 11372 Comm: modprobe Not tainted 4.17.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid+0x275/0x450 lib/list_debug.c:23
RSP: 0000:ffff8800852cef78 EFLAGS: 00010086
RAX: 0000000000000075 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88021fd36eec
RBP: ffff8800852cefe0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff86575950 R12: ffffea0004532060
R13: ffffea00045333e0 R14: 0000000000000000 R15: ffffffff8b58d000
FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe15139f360 CR3: 000000000ac30000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __list_add include/linux/list.h:60 [inline]
 list_add include/linux/list.h:79 [inline]
 __free_one_page+0x1483/0x1800 mm/page_alloc.c:876
 free_pcppages_bulk+0x1039/0x12e0 mm/page_alloc.c:1160
 free_unref_page_commit+0x358/0x4d0 mm/page_alloc.c:2778
 free_unref_page mm/page_alloc.c:2794 [inline]
 __free_pages+0x1b9/0x240 mm/page_alloc.c:4440
 kmsan_free_page+0x197/0x2e0 mm/kmsan/kmsan.c:959
 free_pages_prepare mm/page_alloc.c:996 [inline]
 free_pcp_prepare mm/page_alloc.c:1060 [inline]
 free_unref_page_prepare+0x234/0x620 mm/page_alloc.c:2741
 free_unref_page_list+0x278/0x8b0 mm/page_alloc.c:2810
 release_pages+0x1637/0x1650 mm/swap.c:791
 free_pages_and_swap_cache+0x55b/0x580 mm/swap_state.c:322
 tlb_flush_mmu_free mm/memory.c:260 [inline]
 tlb_flush_mmu mm/memory.c:269 [inline]
 arch_tlb_finish_mmu mm/memory.c:284 [inline]
 tlb_finish_mmu+0x290/0x5c0 mm/memory.c:434
 exit_mmap+0x539/0x980 mm/mmap.c:3107
 __mmput+0x158/0x600 kernel/fork.c:962
 mmput+0xab/0xf0 kernel/fork.c:983
 exit_mm+0x6ed/0x7a0 kernel/exit.c:545
 do_exit+0xc12/0x3930 kernel/exit.c:854
 do_group_exit+0x1a0/0x360 kernel/exit.c:970
 get_signal+0x1405/0x1ec0 kernel/signal.c:2482
 do_signal+0xb8/0x1d20 arch/x86/kernel/signal.c:810
 exit_to_usermode_loop arch/x86/entry/common.c:162 [inline]
 prepare_exit_to_usermode+0x271/0x3a0 arch/x86/entry/common.c:196
 retint_user+0x8/0x8
RIP: 0033:0x7fe151835c70
RSP: 002b:00007ffce71a9950 EFLAGS: 00010206
RAX: 00007fe15139f360 RBX: 00007fe151a489a8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000fefa3223 RDI: 0000000000000006
RBP: 00007ffce71a9a30 R08: 000000000000003f R09: 0000000000000001
R10: 00007fe1512a5af0 R11: 00007ffce71a9780 R12: 00007fe151287000
R13: 00007fe15160e038 R14: 00007fe1512a5ac0 R15: 00007fe15160ed98
Code: 87 80 0c 00 00 00 00 00 00 41 c7 87 20 03 00 00 00 00 00 00 48 c7 c7 e4 b0 9c 8a 31 c0 48 89 d6 4c 89 ea 4c 89 e1 e8 1b a5 3e fd <0f> 0b 66 0f 1f 84 00 00 00 00 00 eb fe 48 8b 7d c8 e8 b5 9d be 
RIP: __list_add_valid+0x275/0x450 lib/list_debug.c:23 RSP: ffff8800852cef78
---[ end trace e32c364d784b000b ]---