page last free pid 10151 tgid 10150 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0x7e1/0x10d0 mm/page_alloc.c:2978 tlb_batch_list_free mm/mmu_gather.c:161 [inline] tlb_finish_mmu+0x27d/0x810 mm/mmu_gather.c:533 exit_mmap+0x454/0xa30 mm/mmap.c:1315 __mmput+0x12a/0x410 kernel/fork.c:1175 mmput+0x67/0x80 kernel/fork.c:1198 exit_mm kernel/exit.c:581 [inline] do_exit+0x819/0x2b60 kernel/exit.c:964 do_group_exit+0xd5/0x2a0 kernel/exit.c:1118 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x67c/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:858! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 10184 Comm: syz.0.1106 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:__filemap_add_folio+0xfcf/0x1280 mm/filemap.c:858 Code: 2e c5 ff 48 c7 c6 e0 39 bd 8b 4c 89 ef e8 d9 3f 12 00 90 0f 0b e8 11 2e c5 ff 48 c7 c6 40 3a bd 8b 4c 89 ef e8 c2 3f 12 00 90 <0f> 0b e8 fa 2d c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 ec 2d c5 ff 90 RSP: 0018:ffffc90003db7260 EFLAGS: 00010246 RAX: 0000000000080000 RBX: 0000000000112cc0 RCX: ffffc9000d8a2000 RDX: 0000000000080000 RSI: ffffffff82560f68 RDI: ffff888032e8a984 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000004 R13: ffffea0000caa9c0 R14: 0000000000000000 R15: 1ffff920007b6e76 FS: 00007f6d4a0466c0(0000) GS:ffff888124338000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000c9000 CR3: 000000008ebf2000 CR4: 00000000003526f0 Call Trace: filemap_add_folio+0x1d8/0x690 mm/filemap.c:966 ra_alloc_folio mm/readahead.c:456 [inline] page_cache_ra_order+0x614/0xf30 mm/readahead.c:515 do_sync_mmap_readahead mm/filemap.c:3405 [inline] filemap_fault+0x191a/0x2eb0 mm/filemap.c:3554 __do_fault+0x10d/0x550 mm/memory.c:5364 do_read_fault mm/memory.c:5799 [inline] do_fault+0xabb/0x18e0 mm/memory.c:5933 do_pte_missing mm/memory.c:4477 [inline] handle_pte_fault mm/memory.c:6317 [inline] __handle_mm_fault+0x1815/0x2b60 mm/memory.c:6455 handle_mm_fault+0x36d/0xa20 mm/memory.c:6624 do_user_addr_fault+0x74c/0x12f0 arch/x86/mm/fault.c:1385 handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0010:rep_movs_alternative+0x30/0x90 arch/x86/lib/copy_user_64.S:60 Code: 83 f9 08 73 25 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 fd 93 04 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <48> 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 RSP: 0018:ffffc90003db7a30 EFLAGS: 00050206 RAX: 0000000000000001 RBX: 00002000000c9000 RCX: 0000000000000038 RDX: 0000000000000001 RSI: 00002000000c9000 RDI: ffffc90003db7a88 RBP: 0000000000000038 R08: 0000000000000001 R09: fffff520007b6f57 R10: ffffc90003db7abf R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90003db7a88 R14: 00002000000c9000 R15: dffffc0000000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] _inline_copy_from_user include/linux/uaccess.h:185 [inline] _copy_from_user+0x98/0xd0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:223 [inline] copy_msghdr_from_user+0x9f/0x4f0 net/socket.c:2522 recvmsg_copy_msghdr net/socket.c:2778 [inline] ___sys_recvmsg+0xdd/0x1a0 net/socket.c:2850 do_recvmmsg+0x301/0x760 net/socket.c:2949 __sys_recvmmsg net/socket.c:3023 [inline] __do_sys_recvmmsg net/socket.c:3046 [inline] __se_sys_recvmmsg net/socket.c:3039 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3039 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6d4919c819 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:00007f6d4a046028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f6d49416090 RCX: 00007f6d4919c819 RDX: 00000000080002c1 RSI: 0000200000000040 RDI: 0000000000000003 RBP: 00007f6d49232c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6d49416128 R14: 00007f6d49416090 R15: 00007fff2188fdd8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__filemap_add_folio+0xfcf/0x1280 mm/filemap.c:858 Code: 2e c5 ff 48 c7 c6 e0 39 bd 8b 4c 89 ef e8 d9 3f 12 00 90 0f 0b e8 11 2e c5 ff 48 c7 c6 40 3a bd 8b 4c 89 ef e8 c2 3f 12 00 90 <0f> 0b e8 fa 2d c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 ec 2d c5 ff 90 RSP: 0018:ffffc90003db7260 EFLAGS: 00010246 RAX: 0000000000080000 RBX: 0000000000112cc0 RCX: ffffc9000d8a2000 RDX: 0000000000080000 RSI: ffffffff82560f68 RDI: ffff888032e8a984 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000004 R13: ffffea0000caa9c0 R14: 0000000000000000 R15: 1ffff920007b6e76 FS: 00007f6d4a0466c0(0000) GS:ffff888124338000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000c9000 CR3: 000000008ebf2000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 83 f9 08 cmp $0x8,%ecx 3: 73 25 jae 0x2a 5: 85 c9 test %ecx,%ecx 7: 74 0f je 0x18 9: 8a 06 mov (%rsi),%al b: 88 07 mov %al,(%rdi) d: 48 ff c7 inc %rdi 10: 48 ff c6 inc %rsi 13: 48 ff c9 dec %rcx 16: 75 f1 jne 0x9 18: e9 fd 93 04 00 jmp 0x4941a 1d: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 24: 00 00 00 00 28: 66 90 xchg %ax,%ax * 2a: 48 8b 06 mov (%rsi),%rax <-- trapping instruction 2d: 48 89 07 mov %rax,(%rdi) 30: 48 83 c6 08 add $0x8,%rsi 34: 48 83 c7 08 add $0x8,%rdi 38: 83 e9 08 sub $0x8,%ecx 3b: 74 db je 0x18 3d: 83 f9 08 cmp $0x8,%ecx