------------[ cut here ]------------
WARNING: mm/memcontrol-v1.c:642 at memcg1_swapout+0x6c2/0x8d0 mm/memcontrol-v1.c:642, CPU#1: syz.4.4594/19776
Modules linked in:
CPU: 1 UID: 0 PID: 19776 Comm: syz.4.4594 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:memcg1_swapout+0x6c2/0x8d0 mm/memcontrol-v1.c:642
Code: ce 7e 0d 00 0f 85 01 fa ff ff 48 89 df 48 c7 c6 20 c4 98 8b e8 8f 4e f8 fe c6 05 3b ce 7e 0d 01 90 0f 0b 90 e9 e2 f9 ff ff 90 <0f> 0b 90 e9 eb fb ff ff 90 0f 0b 90 41 80 3c 2e 00 0f 85 d5 fe ff
RSP: 0018:ffffc90003495158 EFLAGS: 00010002
RAX: 0000000000000007 RBX: ffffea00021e7540 RCX: ffff888063fb0150
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc9000b626bf8
RBP: dffffc0000000000 R08: ffffc9000b626bfb R09: 1ffff920016c4d7f
R10: dffffc0000000000 R11: fffff520016c4d80 R12: ffffea00021e7548
R13: 1ffffd400043cea8 R14: 1ffffd400043cea9 R15: ffff8880636c1538
FS:  0000000000000000(0000) GS:ffff888125aad000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fef691fc200 CR3: 000000007e4b2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __remove_mapping+0xac5/0xe30 mm/vmscan.c:764
 shrink_folio_list+0x28d8/0x5320 mm/vmscan.c:1542
 evict_folios+0x473e/0x57f0 mm/vmscan.c:4748
 try_to_shrink_lruvec+0x8be/0xb60 mm/vmscan.c:4911
 lru_gen_shrink_lruvec mm/vmscan.c:5060 [inline]
 shrink_lruvec+0x4a3/0x2a40 mm/vmscan.c:5814
 shrink_node_memcgs mm/vmscan.c:6050 [inline]
 shrink_node+0xa19/0x39c0 mm/vmscan.c:6091
 shrink_zones mm/vmscan.c:6330 [inline]
 do_try_to_free_pages+0x668/0x18a0 mm/vmscan.c:6392
 try_to_free_mem_cgroup_pages+0x2b6/0x730 mm/vmscan.c:6713
 try_charge_memcg+0xa2d/0x1280 mm/memcontrol.c:2414
 try_charge mm/memcontrol.c:2556 [inline]
 charge_memcg+0x9f/0x180 mm/memcontrol.c:4728
 __mem_cgroup_charge+0x25/0x80 mm/memcontrol.c:4745
 mem_cgroup_charge include/linux/memcontrol.h:665 [inline]
 shmem_alloc_and_add_folio+0x790/0xf40 mm/shmem.c:1955
 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2540
 shmem_get_folio mm/shmem.c:2646 [inline]
 shmem_write_begin+0x16c/0x330 mm/shmem.c:3299
 generic_perform_write+0x2c5/0x900 mm/filemap.c:4314
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3474
 __kernel_write_iter+0x428/0x910 fs/read_write.c:621
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0x8a0/0xc90 fs/coredump.c:1372
 elf_core_dump+0x3369/0x3960 fs/binfmt_elf.c:2111
 coredump_write+0x1121/0x18b0 fs/coredump.c:1049
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x3321/0x3e60 fs/coredump.c:1200
 get_signal+0x1108/0x1340 kernel/signal.c:3019
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0x178/0x670 kernel/entry/common.c:196
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f221c04f6b7
Code: 88 15 42 60 ec 00 88 05 3f 60 ec 00 c3 50 48 8d 35 e9 48 1c 00 48 8d 3d ef 48 1c 00 31 c0 e8 20 f7 ff ff 53 89 fb 48 83 ec 10 <64> 8b 04 25 94 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007f221a3d7120 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f221c18f749
RDX: 00007f221a3d7140 RSI: 00007f221a3d7270 RDI: 000000000000000b
RBP: 00007f221c213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f221c3e6038 R14: 00007f221c3e5fa0 R15: 00007ffe0003a098
 </TASK>