alloc_thread_stack_node kernel/fork.c:360 [inline]
 dup_task_struct+0x298/0x840 kernel/fork.c:927
 copy_process+0x89b/0x4430 kernel/fork.c:2098
 kernel_clone+0x26d/0x8e0 kernel/fork.c:2720
 __do_sys_clone3 kernel/fork.c:3021 [inline]
 __se_sys_clone3+0x33c/0x360 kernel/fork.c:3000
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:860!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 30958 Comm: syz.3.6954 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__filemap_add_folio+0x11bc/0x1330 mm/filemap.c:859
Code: 06 c5 ff 4c 89 e7 48 c7 c6 40 b9 d7 8b e8 3c 89 26 ff 90 0f 0b e8 b4 06 c5 ff 4c 89 e7 48 c7 c6 a0 ad d7 8b e8 25 89 26 ff 90 <0f> 0b e8 9d 06 c5 ff 4c 89 e7 48 c7 c6 40 b9 d7 8b e8 0e 89 26 ff
RSP: 0018:ffffc90003a075c0 EFLAGS: 00010246
RAX: 79659086082c8200 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8e05f4c1 RDI: 00000000ffffffff
RBP: ffffc90003a07740 R08: ffffffff903444f7 R09: 1ffffffff206889e
R10: dffffc0000000000 R11: fffffbfff206889f R12: ffffea0001667c00
R13: dffffc0000000000 R14: ffffea0001667c08 R15: 0000000000000004
FS:  0000555572690500(0000) GS:ffff8881250f3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3bfa81 CR3: 000000009fa28000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_add_folio+0x264/0x530 mm/filemap.c:967
 ra_alloc_folio mm/readahead.c:456 [inline]
 page_cache_ra_order+0x6a9/0xe80 mm/readahead.c:515
 do_sync_mmap_readahead+0x6ad/0x8e0 mm/filemap.c:3406
 filemap_fault+0x703/0x1300 mm/filemap.c:3555
 __do_fault+0x3e7/0x590 mm/memory.c:5502
 do_shared_fault mm/memory.c:6001 [inline]
 do_fault mm/memory.c:6075 [inline]
 do_pte_missing+0x601/0x33f0 mm/memory.c:4550
 handle_pte_fault mm/memory.c:6455 [inline]
 __handle_mm_fault mm/memory.c:6593 [inline]
 handle_mm_fault+0x1bd7/0x3170 mm/memory.c:6762
 do_user_addr_fault+0xa73/0x1340 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f3c39a72137
Code: 83 ea 01 48 d3 e2 44 89 c1 49 d3 e1 f7 d2 89 c1 22 17 49 f7 d1 89 d0 4c 21 ce 48 d3 e6 09 f0 88 07 c3 90 48 85 d2 75 98 89 f0 <88> 07 c3 48 89 d7 e8 ae 24 fe ff 66 2e 0f 1f 84 00 00 00 00 00 66
RSP: 002b:00007ffc07866e48 EFLAGS: 00010246
RAX: 0000000000000012 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000012 RDI: 00002000000000c0
RBP: 00007ffc07866f70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000012 R11: 0000000000000000 R12: 00007ffc07866fb0
R13: 00007f3c39e1654c R14: 000000000013ed78 R15: 00007f3c39e16540
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x11bc/0x1330 mm/filemap.c:859
Code: 06 c5 ff 4c 89 e7 48 c7 c6 40 b9 d7 8b e8 3c 89 26 ff 90 0f 0b e8 b4 06 c5 ff 4c 89 e7 48 c7 c6 a0 ad d7 8b e8 25 89 26 ff 90 <0f> 0b e8 9d 06 c5 ff 4c 89 e7 48 c7 c6 40 b9 d7 8b e8 0e 89 26 ff
RSP: 0018:ffffc90003a075c0 EFLAGS: 00010246
RAX: 79659086082c8200 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8e05f4c1 RDI: 00000000ffffffff
RBP: ffffc90003a07740 R08: ffffffff903444f7 R09: 1ffffffff206889e
R10: dffffc0000000000 R11: fffffbfff206889f R12: ffffea0001667c00
R13: dffffc0000000000 R14: ffffea0001667c08 R15: 0000000000000004
FS:  0000555572690500(0000) GS:ffff888124ff3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033