syzbot

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kernel BUG at mm/swap_cgroup.c:78!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 87 Comm: kswapd0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:swap_cgroup_record+0x19c/0x1c0 mm/swap_cgroup.c:78
Code: 02 e9 6d ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 35 ff ff ff 4c 89 f7 e8 ff 79 f6 ff e9 28 ff ff ff e8 55 a9 8f ff 90 <0f> 0b e8 4d a9 8f ff 4c 89 f7 48 c7 c6 e0 f6 98 8b e8 3e f7 f6 fe
RSP: 0018:ffffc9000238ec20 EFLAGS: 00010093
RAX: ffffffff8231116b RBX: 0000000000000f7b RCX: ffff88801bf45ac0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000471d74 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffc9000b41c000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125c07000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2faaf9f7d0 CR3: 00000000774da000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 memcg1_swapout+0x2fa/0x830 mm/memcontrol-v1.c:645
 __remove_mapping+0xac5/0xe30 mm/vmscan.c:764
 shrink_folio_list+0x28a8/0x5200 mm/vmscan.c:1523
 evict_folios+0x473e/0x57f0 mm/vmscan.c:4729
 try_to_shrink_lruvec+0x8be/0xb60 mm/vmscan.c:4892
 shrink_one+0x25c/0x720 mm/vmscan.c:4937
 shrink_many mm/vmscan.c:5000 [inline]
 lru_gen_shrink_node mm/vmscan.c:5078 [inline]
 shrink_node+0x3033/0x3720 mm/vmscan.c:6065
 kswapd_shrink_node mm/vmscan.c:6912 [inline]
 balance_pgdat mm/vmscan.c:7088 [inline]
 kswapd+0x13d2/0x27f0 mm/vmscan.c:7358
 kthread+0x389/0x480 kernel/kthread.c:467
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:swap_cgroup_record+0x19c/0x1c0 mm/swap_cgroup.c:78
Code: 02 e9 6d ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 35 ff ff ff 4c 89 f7 e8 ff 79 f6 ff e9 28 ff ff ff e8 55 a9 8f ff 90 <0f> 0b e8 4d a9 8f ff 4c 89 f7 48 c7 c6 e0 f6 98 8b e8 3e f7 f6 fe
RSP: 0018:ffffc9000238ec20 EFLAGS: 00010093
RAX: ffffffff8231116b RBX: 0000000000000f7b RCX: ffff88801bf45ac0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000471d74 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffc9000b41c000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125c07000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2faaf9f7d0 CR3: 00000000774da000 CR4: 00000000003526f0