do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:859! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 8665 Comm: syz.0.603 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026 RIP: 0010:__filemap_add_folio+0x11ee/0x1360 mm/filemap.c:858 Code: ff 4c 89 f7 48 c7 c6 a0 f5 f7 8b e8 ac f5 22 ff 90 0f 0b e8 64 49 c1 ff 48 8b 7c 24 08 48 c7 c6 60 ea f7 8b e8 93 f5 22 ff 90 <0f> 0b e8 4b 49 c1 ff 4c 89 f7 48 c7 c6 a0 f5 f7 8b e8 7c f5 22 ff RSP: 0018:ffffc9000ff2f020 EFLAGS: 00010246 RAX: 346e51d03297c500 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff8e229c3f RDI: 00000000ffffffff RBP: ffffc9000ff2f1a0 R08: ffffffff90576ff7 R09: 1ffffffff20aedfe R10: dffffc0000000000 R11: fffffbfff20aedff R12: dffffc0000000000 R13: ffff88802395cdc0 R14: 0000000000000002 R15: ffff88802395ced8 FS: 00007fc4785f66c0(0000) GS:ffff888125059000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0a2ae22ff8 CR3: 0000000055c2b000 CR4: 0000000000350ef0 Call Trace: filemap_add_folio+0x25e/0x530 mm/filemap.c:966 ra_alloc_folio mm/readahead.c:470 [inline] page_cache_ra_order+0x6d1/0xee0 mm/readahead.c:535 do_sync_mmap_readahead+0x75e/0x990 mm/filemap.c:3428 filemap_fault+0x7d9/0x13b0 mm/filemap.c:3582 __do_fault+0x138/0x2a0 mm/memory.c:5425 do_read_fault mm/memory.c:5860 [inline] do_fault mm/memory.c:5994 [inline] do_pte_missing+0x2215/0x34b0 mm/memory.c:4566 handle_pte_fault mm/memory.c:6379 [inline] __handle_mm_fault mm/memory.c:6517 [inline] handle_mm_fault+0x1b36/0x3080 mm/memory.c:6686 do_user_addr_fault+0x744/0x1340 arch/x86/mm/fault.c:1394 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] RIP: 0010:raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] RIP: 0010:_inline_copy_from_user include/linux/uaccess.h:185 [inline] RIP: 0010:_copy_from_user+0x75/0xb0 lib/usercopy.c:18 Code: fd eb 49 48 b8 00 f0 ff ff ff 7f 00 00 49 39 c7 4c 0f 47 f8 4c 89 f7 89 de e8 d7 1d 61 fd 0f 01 cb 4c 89 f7 48 89 d9 4c 89 fe a4 0f 1f 00 49 89 cf 0f 01 ca 31 ff 48 89 ce e8 26 95 f3 fc 4d RSP: 0018:ffffc9000ff2fa40 EFLAGS: 00050256 RAX: 00007ffffffff001 RBX: 0000000000000038 RCX: 0000000000000038 RDX: 0000000000000001 RSI: 0000200000739000 RDI: ffffc9000ff2fac0 RBP: ffffc9000ff2fc50 R08: ffffc9000ff2faf7 R09: 1ffff92001fe5f5e R10: dffffc0000000000 R11: fffff52001fe5f5f R12: ffffc9000ff2fbc0 R13: ffffc9000ff2fac0 R14: ffffc9000ff2fac0 R15: 0000200000739000 copy_from_user include/linux/uaccess.h:222 [inline] copy_msghdr_from_user net/socket.c:2614 [inline] recvmsg_copy_msghdr net/socket.c:2870 [inline] ___sys_recvmsg+0x173/0x5a0 net/socket.c:2942 do_recvmmsg+0x31a/0x7f0 net/socket.c:3041 __sys_recvmmsg net/socket.c:3115 [inline] __do_sys_recvmmsg net/socket.c:3138 [inline] __se_sys_recvmmsg net/socket.c:3131 [inline] __x64_sys_recvmmsg+0x198/0x250 net/socket.c:3131 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc47a39de59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc4785f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fc47a625fa0 RCX: 00007fc47a39de59 RDX: 03fffffffffffde9 RSI: 0000200000008bc0 RDI: 0000000000000007 RBP: 00007fc47a433e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc47a626038 R14: 00007fc47a625fa0 R15: 00007ffde356c368 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__filemap_add_folio+0x11ee/0x1360 mm/filemap.c:858 Code: ff 4c 89 f7 48 c7 c6 a0 f5 f7 8b e8 ac f5 22 ff 90 0f 0b e8 64 49 c1 ff 48 8b 7c 24 08 48 c7 c6 60 ea f7 8b e8 93 f5 22 ff 90 <0f> 0b e8 4b 49 c1 ff 4c 89 f7 48 c7 c6 a0 f5 f7 8b e8 7c f5 22 ff RSP: 0018:ffffc9000ff2f020 EFLAGS: 00010246 RAX: 346e51d03297c500 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000007 RSI: ffffffff8e229c3f RDI: 00000000ffffffff RBP: ffffc9000ff2f1a0 R08: ffffffff90576ff7 R09: 1ffffffff20aedfe R10: dffffc0000000000 R11: fffffbfff20aedff R12: dffffc0000000000 R13: ffff88802395cdc0 R14: 0000000000000002 R15: ffff88802395ced8 FS: 00007fc4785f66c0(0000) GS:ffff888124f59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11991ed2f8 CR3: 0000000055c2b000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: fd std 1: eb 49 jmp 0x4c 3: 48 b8 00 f0 ff ff ff movabs $0x7ffffffff000,%rax a: 7f 00 00 d: 49 39 c7 cmp %rax,%r15 10: 4c 0f 47 f8 cmova %rax,%r15 14: 4c 89 f7 mov %r14,%rdi 17: 89 de mov %ebx,%esi 19: e8 d7 1d 61 fd call 0xfd611df5 1e: 0f 01 cb stac 21: 4c 89 f7 mov %r14,%rdi 24: 48 89 d9 mov %rbx,%rcx 27: 4c 89 fe mov %r15,%rsi * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 0f 1f 00 nopl (%rax) 2f: 49 89 cf mov %rcx,%r15 32: 0f 01 ca clac 35: 31 ff xor %edi,%edi 37: 48 89 ce mov %rcx,%rsi 3a: e8 26 95 f3 fc call 0xfcf39565 3f: 4d rex.WRB