asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 page last free pid 11412 tgid 11411 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706 __folio_put+0x21b/0x2c0 mm/swap.c:112 folio_put include/linux/mm.h:1356 [inline] free_large_kmalloc+0x145/0x200 mm/slub.c:4768 process_vm_rw+0xa72/0xb40 mm/process_vm_access.c:286 __do_sys_process_vm_readv mm/process_vm_access.c:296 [inline] __se_sys_process_vm_readv mm/process_vm_access.c:292 [inline] __x64_sys_process_vm_readv+0xe0/0x100 mm/process_vm_access.c:292 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:3442! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 11421 Comm: syz.0.1036 Not tainted 6.16.0-rc4-syzkaller-00049-gb4911fb0b060 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:filemap_fault+0x117d/0x1200 mm/filemap.c:3442 Code: 38 c1 0f 8c 8e fc ff ff 4c 89 e7 e8 8d 6b 29 00 e9 81 fc ff ff e8 a3 13 c8 ff 48 89 df 48 c7 c6 a0 30 94 8b e8 d4 ae 0d 00 90 <0f> 0b e8 8c 13 c8 ff 48 8b 3c 24 48 c7 c6 20 37 94 8b e8 bc ae 0d RSP: 0018:ffffc900038cf6e0 EFLAGS: 00010246 RAX: a2ef37e20b2b5200 RBX: ffffea0000ca1580 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8d96e815 RDI: 00000000ffffffff RBP: ffffc900038cf818 R08: ffffffff8f9fdbf7 R09: 1ffffffff1f3fb7e R10: dffffc0000000000 R11: fffffbfff1f3fb7f R12: dffffc0000000000 R13: 1ffffd40001942b1 R14: ffffea0000ca1598 R15: ffffea0000ca1588 FS: 00007f6e1266c6c0(0000) GS:ffff888125c84000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe89817dfe0 CR3: 0000000067806000 CR4: 00000000003526f0 Call Trace: __do_fault+0x135/0x390 mm/memory.c:5169 do_shared_fault mm/memory.c:5654 [inline] do_fault mm/memory.c:5728 [inline] do_pte_missing mm/memory.c:4251 [inline] handle_pte_fault mm/memory.c:6069 [inline] __handle_mm_fault+0x198b/0x5620 mm/memory.c:6212 handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6381 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_4+0xd/0x20 arch/x86/lib/putuser.S:94 Code: 66 89 01 31 c9 0f 01 ca e9 00 3b 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <89> 01 31 c9 0f 01 ca e9 d7 3a 03 00 90 90 90 90 90 90 90 90 90 90 RSP: 0000:ffffc900038cfc98 EFLAGS: 00050206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000200000001b78 RDX: 0000000000000000 RSI: ffffffff8db5a681 RDI: ffffffff8be1b940 RBP: ffffc900038cfeb0 R08: 0000000000000000 R09: ffffffff820a3bc0 R10: dffffc0000000000 R11: ffffed100eeac571 R12: 0000200000001b40 R13: 0000000000040000 R14: 0000200000000480 R15: 000000000000005b __sys_sendmmsg+0x25f/0x430 net/socket.c:2714 __do_sys_sendmmsg net/socket.c:2736 [inline] __se_sys_sendmmsg net/socket.c:2733 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2733 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6e1178e929 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:00007f6e1266c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f6e119b6080 RCX: 00007f6e1178e929 RDX: 00000000000002e9 RSI: 0000200000000480 RDI: 0000000000000005 RBP: 00007f6e11810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6e119b6080 R15: 00007ffc97bf6b88 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:filemap_fault+0x117d/0x1200 mm/filemap.c:3442 Code: 38 c1 0f 8c 8e fc ff ff 4c 89 e7 e8 8d 6b 29 00 e9 81 fc ff ff e8 a3 13 c8 ff 48 89 df 48 c7 c6 a0 30 94 8b e8 d4 ae 0d 00 90 <0f> 0b e8 8c 13 c8 ff 48 8b 3c 24 48 c7 c6 20 37 94 8b e8 bc ae 0d RSP: 0018:ffffc900038cf6e0 EFLAGS: 00010246 RAX: a2ef37e20b2b5200 RBX: ffffea0000ca1580 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8d96e815 RDI: 00000000ffffffff RBP: ffffc900038cf818 R08: ffffffff8f9fdbf7 R09: 1ffffffff1f3fb7e R10: dffffc0000000000 R11: fffffbfff1f3fb7f R12: dffffc0000000000 R13: 1ffffd40001942b1 R14: ffffea0000ca1598 R15: ffffea0000ca1588 FS: 00007f6e1266c6c0(0000) GS:ffff888125c84000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c2004c4fb0 CR3: 0000000067806000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 66 89 01 mov %ax,(%rcx) 3: 31 c9 xor %ecx,%ecx 5: 0f 01 ca clac 8: e9 00 3b 03 00 jmp 0x33b0d d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 48 89 cb mov %rcx,%rbx 20: 48 c1 fb 3f sar $0x3f,%rbx 24: 48 09 d9 or %rbx,%rcx 27: 0f 01 cb stac * 2a: 89 01 mov %eax,(%rcx) <-- trapping instruction 2c: 31 c9 xor %ecx,%ecx 2e: 0f 01 ca clac 31: e9 d7 3a 03 00 jmp 0x33b0d 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop