smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ------------[ cut here ]------------ kernel BUG at mm/z3fold.c:1293! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 7645 Comm: syz.3.748 Not tainted 6.14.0-rc6-syzkaller-00212-geb88e6bfbc0a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:z3fold_page_migrate+0xc37/0x12d0 mm/z3fold.c:1293 Code: 26 93 ff 48 c7 c6 80 ff 7d 8b 48 89 ef e8 11 a5 d9 ff 90 0f 0b e8 39 26 93 ff 48 c7 c6 e0 ff 7d 8b 48 89 ef e8 fa a4 d9 ff 90 <0f> 0b e8 22 26 93 ff 48 8d bb a0 00 00 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc900037162d0 EFLAGS: 00010246 RAX: 0000000000080000 RBX: 0000000000000000 RCX: ffffc9000c803000 RDX: 0000000000080000 RSI: ffffffff8226cb96 RDI: ffff888025082884 RBP: ffffea00010dba80 R08: 0000000000000001 R09: fffffbfff2dd83ac R10: ffffffff96ec1d67 R11: 000000000000030a R12: ffffea0001e48000 R13: ffffea00010dbaa8 R14: 0000000000000001 R15: ffffea00010dba98 FS: 0000000000000000(0000) GS:ffff88802b400000(0063) knlGS:00000000f5066b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f70a526f CR3: 00000000695f4000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: move_to_new_folio+0x449/0x700 mm/migrate.c:1071 migrate_folio_move mm/migrate.c:1360 [inline] migrate_folios_move mm/migrate.c:1712 [inline] migrate_pages_batch+0x2009/0x3150 mm/migrate.c:1959 migrate_pages_sync+0x4f1/0x910 mm/migrate.c:2016 migrate_pages+0x1acf/0x2290 mm/migrate.c:2098 compact_zone+0x1f66/0x4220 mm/compaction.c:2663 compact_zone_order+0x16b/0x240 mm/compaction.c:2798 try_to_compact_pages+0x357/0xa80 mm/compaction.c:2859 __alloc_pages_direct_compact+0x138/0x590 mm/page_alloc.c:3685 __alloc_pages_slowpath mm/page_alloc.c:4389 [inline] __alloc_frozen_pages_noprof+0xbe5/0x2470 mm/page_alloc.c:4753 alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline] alloc_pages_noprof+0x131/0x390 mm/mempolicy.c:2361 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x721/0x1530 mm/vmalloc.c:3846 __kvmalloc_node_noprof+0x14f/0x1a0 mm/util.c:687 hash_netiface_create+0x3ea/0x1250 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0x7cb/0x14d0 net/netfilter/ipset/ip_set_core.c:1109 nfnetlink_rcv_msg+0x9c3/0x11e0 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2533 nfnetlink_rcv+0x1b4/0x430 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:733 [inline] ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627 __sys_sendmsg+0x16e/0x220 net/socket.c:2659 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:387 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:412 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f42579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f506655c EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 0000000080000040 RDX: 0000000000000800 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:z3fold_page_migrate+0xc37/0x12d0 mm/z3fold.c:1293 Code: 26 93 ff 48 c7 c6 80 ff 7d 8b 48 89 ef e8 11 a5 d9 ff 90 0f 0b e8 39 26 93 ff 48 c7 c6 e0 ff 7d 8b 48 89 ef e8 fa a4 d9 ff 90 <0f> 0b e8 22 26 93 ff 48 8d bb a0 00 00 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc900037162d0 EFLAGS: 00010246 RAX: 0000000000080000 RBX: 0000000000000000 RCX: ffffc9000c803000 RDX: 0000000000080000 RSI: ffffffff8226cb96 RDI: ffff888025082884 RBP: ffffea00010dba80 R08: 0000000000000001 R09: fffffbfff2dd83ac R10: ffffffff96ec1d67 R11: 000000000000030a R12: ffffea0001e48000 R13: ffffea00010dbaa8 R14: 0000000000000001 R15: ffffea00010dba98 FS: 0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f5066b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f70c526f CR3: 00000000695f4000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi