BUG: kernel NULL pointer dereference, address: 0000000000000164
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 800000002015b067 P4D 800000002015b067 PUD 0 
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6054 Comm: syz.0.61 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:get_partial_node+0x30/0x4a0
Code: 55 41 54 53 48 83 ec 58 48 89 54 24 10 48 89 3c 24 65 48 8b 05 e1 46 aa 10 48 89 44 24 50 48 85 f6 0f 84 1a 04 00 00 48 89 f3 <48> 83 7e 40 00 0f 84 0c 04 00 00 48 8b 44 24 10 f6 40 01 0c 74 0f
RSP: 0018:ffffc9000370e4b0 EFLAGS: 00010206
RAX: 57c1c2061902f500 RBX: 0000000000000124 RCX: 0000000000202801
RDX: ffffc9000370e5a0 RSI: 0000000000000124 RDI: ffffffff8ed0afc0
RBP: 0000000000000000 R08: ffff88804467ea00 R09: 00000000ffffffff
R10: 00000000fffffff0 R11: 0000000000000002 R12: ffffc9000370e5a0
R13: 00000000ffffffff R14: ffff88804467ea00 R15: 0000000000012800
FS:  00007f0393cdf6c0(0000) GS:ffff8880b83dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000164 CR3: 0000000027a46000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ___slab_alloc+0xdea/0x1920
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_noprof+0x3f9/0x6e0
 zs_malloc+0x88/0x720
 zswap_store+0x1062/0x1f40
 swap_writeout+0x710/0xd70
 shrink_folio_list+0x3011/0x4c70
 reclaim_folio_list+0xeb/0x500
 reclaim_pages+0x454/0x520
 madvise_cold_or_pageout_pte_range+0x1974/0x1d00
 walk_pgd_range+0xfe9/0x1d40
 __walk_page_range+0x14c/0x710
 walk_page_range_vma+0x393/0x440
 madvise_vma_behavior+0x311f/0x3a10
 madvise_walk_vmas+0x51c/0xa30
 madvise_do_behavior+0x38e/0x550
 do_madvise+0x1bc/0x270
 __x64_sys_madvise+0xa7/0xc0
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0392d8ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0393cdf038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f0392fd5fa0 RCX: 00007f0392d8ec29
RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000200000000000
RBP: 00007f0392e11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0392fd6038 R14: 00007f0392fd5fa0 R15: 00007ffd7ddb23c8
 </TASK>
Modules linked in:
CR2: 0000000000000164
---[ end trace 0000000000000000 ]---
RIP: 0010:get_partial_node+0x30/0x4a0
Code: 55 41 54 53 48 83 ec 58 48 89 54 24 10 48 89 3c 24 65 48 8b 05 e1 46 aa 10 48 89 44 24 50 48 85 f6 0f 84 1a 04 00 00 48 89 f3 <48> 83 7e 40 00 0f 84 0c 04 00 00 48 8b 44 24 10 f6 40 01 0c 74 0f
RSP: 0018:ffffc9000370e4b0 EFLAGS: 00010206
RAX: 57c1c2061902f500 RBX: 0000000000000124 RCX: 0000000000202801
RDX: ffffc9000370e5a0 RSI: 0000000000000124 RDI: ffffffff8ed0afc0
RBP: 0000000000000000 R08: ffff88804467ea00 R09: 00000000ffffffff
R10: 00000000fffffff0 R11: 0000000000000002 R12: ffffc9000370e5a0
R13: 00000000ffffffff R14: ffff88804467ea00 R15: 0000000000012800
FS:  00007f0393cdf6c0(0000) GS:ffff8880b83dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000164 CR3: 0000000027a46000 CR4: 00000000000006f0
