Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 10287 Comm: syz.4.1140 Not tainted 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:migrate_to_node mm/mempolicy.c:1090 [inline] RIP: 0010:do_migrate_pages+0x403/0x6f0 mm/mempolicy.c:1194 Code: 8b 54 24 30 41 83 c8 10 80 3a 00 4d 63 c0 0f 85 d1 02 00 00 48 89 c1 48 8b 54 24 18 48 be 00 00 00 00 00 fc ff df 48 c1 e9 03 <80> 3c 31 00 48 8b 92 b0 00 00 00 0f 85 74 02 00 00 48 8b 30 49 89 RSP: 0018:ffffc90018e9fd08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90018e9fd78 RCX: 0000000000000000 RDX: ffff88807f31b0c0 RSI: dffffc0000000000 RDI: ffff8880258ba244 RBP: ffff88807f31b230 R08: 0000000000000012 R09: fffffbfff2039772 R10: ffffffff901cbb97 R11: 0000000000000000 R12: 0000000000000001 R13: ffffc90018e9fe90 R14: ffffc90018e9fe98 R15: ffffc90018e9fdf8 FS: 00007f16f0b946c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f16efdde8f8 CR3: 0000000071acc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernel_migrate_pages+0x5b2/0x750 mm/mempolicy.c:1709 __do_sys_migrate_pages mm/mempolicy.c:1727 [inline] __se_sys_migrate_pages mm/mempolicy.c:1723 [inline] __x64_sys_migrate_pages+0x96/0x100 mm/mempolicy.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f16efd7fed9 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:00007f16f0b94058 EFLAGS: 00000246 ORIG_RAX: 0000000000000100 RAX: ffffffffffffffda RBX: 00007f16eff45fa0 RCX: 00007f16efd7fed9 RDX: 00000000200001c0 RSI: 000000000000000c RDI: 000000000000026c RBP: 00007f16efdf3cc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000200 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f16eff45fa0 R15: 00007fff32ca58c8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:migrate_to_node mm/mempolicy.c:1090 [inline] RIP: 0010:do_migrate_pages+0x403/0x6f0 mm/mempolicy.c:1194 Code: 8b 54 24 30 41 83 c8 10 80 3a 00 4d 63 c0 0f 85 d1 02 00 00 48 89 c1 48 8b 54 24 18 48 be 00 00 00 00 00 fc ff df 48 c1 e9 03 <80> 3c 31 00 48 8b 92 b0 00 00 00 0f 85 74 02 00 00 48 8b 30 49 89 RSP: 0018:ffffc90018e9fd08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90018e9fd78 RCX: 0000000000000000 RDX: ffff88807f31b0c0 RSI: dffffc0000000000 RDI: ffff8880258ba244 RBP: ffff88807f31b230 R08: 0000000000000012 R09: fffffbfff2039772 R10: ffffffff901cbb97 R11: 0000000000000000 R12: 0000000000000001 R13: ffffc90018e9fe90 R14: ffffc90018e9fe98 R15: ffffc90018e9fdf8 FS: 00007f16f0b946c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b300d2ff8 CR3: 0000000071acc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8b 54 24 30 mov 0x30(%rsp),%edx 4: 41 83 c8 10 or $0x10,%r8d 8: 80 3a 00 cmpb $0x0,(%rdx) b: 4d 63 c0 movslq %r8d,%r8 e: 0f 85 d1 02 00 00 jne 0x2e5 14: 48 89 c1 mov %rax,%rcx 17: 48 8b 54 24 18 mov 0x18(%rsp),%rdx 1c: 48 be 00 00 00 00 00 movabs $0xdffffc0000000000,%rsi 23: fc ff df 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 80 3c 31 00 cmpb $0x0,(%rcx,%rsi,1) <-- trapping instruction 2e: 48 8b 92 b0 00 00 00 mov 0xb0(%rdx),%rdx 35: 0f 85 74 02 00 00 jne 0x2af 3b: 48 8b 30 mov (%rax),%rsi 3e: 49 rex.WB 3f: 89 .byte 0x89