------------[ cut here ]------------ kernel BUG at mm/swap_cgroup.c:78! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 17163 Comm: syz.9.2019 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: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:ffffc9000bb66700 EFLAGS: 00010083 RAX: ffffffff8231116b RBX: 00000000000001ce RCX: 0000000000080000 RDX: ffffc90010468000 RSI: 0000000000049237 RDI: 0000000000049238 RBP: 000000000000000d R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff5200176ccd0 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffc9000b504000 R15: 000000000000000d FS: 00007ff340f6e6c0(0000) GS:ffff888125c07000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff340f6df98 CR3: 0000000058d18000 CR4: 00000000003526f0 DR0: 0000000000800003 DR1: 00000000000001f5 DR2: 0000000000000483 DR3: 0000000000000007 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: 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 reclaim_folio_list+0xeb/0x4e0 mm/vmscan.c:2203 reclaim_pages+0x454/0x520 mm/vmscan.c:2240 madvise_cold_or_pageout_pte_range+0x19a0/0x1ce0 mm/madvise.c:563 walk_pmd_range mm/pagewalk.c:130 [inline] walk_pud_range mm/pagewalk.c:224 [inline] walk_p4d_range mm/pagewalk.c:262 [inline] walk_pgd_range+0x1037/0x1d30 mm/pagewalk.c:303 __walk_page_range+0x14c/0x710 mm/pagewalk.c:410 walk_page_range_vma_unsafe+0x34c/0x400 mm/pagewalk.c:714 madvise_pageout_page_range mm/madvise.c:622 [inline] madvise_pageout mm/madvise.c:647 [inline] madvise_vma_behavior+0x3132/0x4170 mm/madvise.c:1366 madvise_walk_vmas+0x575/0xaf0 mm/madvise.c:1721 madvise_do_behavior+0x38e/0x550 mm/madvise.c:1937 do_madvise+0x1bc/0x270 mm/madvise.c:2030 __do_sys_madvise mm/madvise.c:2039 [inline] __se_sys_madvise mm/madvise.c:2037 [inline] __x64_sys_madvise+0xa7/0xc0 mm/madvise.c:2037 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff34358f749 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:00007ff340f6e038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007ff3437e6360 RCX: 00007ff34358f749 RDX: 0000000000000015 RSI: 0000000000600003 RDI: 0000200000000000 RBP: 00007ff343613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff3437e63f8 R14: 00007ff3437e6360 R15: 00007fff2ea17788 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:ffffc9000bb66700 EFLAGS: 00010083 RAX: ffffffff8231116b RBX: 00000000000001ce RCX: 0000000000080000 RDX: ffffc90010468000 RSI: 0000000000049237 RDI: 0000000000049238 RBP: 000000000000000d R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff5200176ccd0 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffc9000b504000 R15: 000000000000000d FS: 00007ff340f6e6c0(0000) GS:ffff888125c07000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff340f6df98 CR3: 0000000058d18000 CR4: 00000000003526f0 DR0: 0000000000800003 DR1: 00000000000001f5 DR2: 0000000000000483 DR3: 0000000000000007 DR6: 00000000ffff0ff0 DR7: 0000000000000400