ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
kernel BUG at mm/filemap.c:859!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 16395 Comm: syz.4.2961 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__filemap_add_folio+0x1204/0x1350 mm/filemap.c:858
Code: d9 c5 ff 4c 89 e7 48 c7 c6 e0 a3 d7 8b e8 94 07 29 ff 90 0f 0b e8 9c d9 c5 ff 4c 89 e7 48 c7 c6 80 98 d7 8b e8 7d 07 29 ff 90 <0f> 0b e8 85 d9 c5 ff 4c 89 e7 48 c7 c6 e0 a3 d7 8b e8 66 07 29 ff
RSP: 0018:ffffc9000216f1e0 EFLAGS: 00010246
RAX: 9039ff9dae0b3c00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8dee28f9 RDI: 00000000ffffffff
RBP: ffffc9000216f360 R08: ffffffff90108ab7 R09: 1ffffffff2021156
R10: dffffc0000000000 R11: fffffbfff2021157 R12: ffffea0001893000
R13: dffffc0000000000 R14: ffff888026487b80 R15: 0000000000000004
FS:  00007f243e41c6c0(0000) GS:ffff8881252a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0b4d9eced0 CR3: 000000005fe56000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_add_folio+0x264/0x530 mm/filemap.c:966
 ra_alloc_folio mm/readahead.c:453 [inline]
 page_cache_ra_order+0x6a8/0xe50 mm/readahead.c:512
 do_sync_mmap_readahead+0x6ad/0x8e0 mm/filemap.c:3400
 filemap_fault+0x703/0x12d0 mm/filemap.c:3549
 __do_fault+0x138/0x390 mm/memory.c:5373
 do_read_fault mm/memory.c:5808 [inline]
 do_fault mm/memory.c:5942 [inline]
 do_pte_missing+0x228f/0x3750 mm/memory.c:4487
 handle_pte_fault mm/memory.c:6326 [inline]
 __handle_mm_fault mm/memory.c:6464 [inline]
 handle_mm_fault+0x1bec/0x3310 mm/memory.c:6633
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x165b/0x29d0 mm/gup.c:1428
 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860
 __mm_populate+0x25f/0x390 mm/gup.c:1963
 mm_populate include/linux/mm.h:3899 [inline]
 vm_mmap_pgoff+0x3aa/0x4f0 mm/util.c:586
 ksys_mmap_pgoff+0x51e/0x760 mm/mmap.c:605
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f243d59aeb9
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:00007f243e41c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f243d816090 RCX: 00007f243d59aeb9
RDX: 0000000001000002 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f243d608c1f R08: 0000000000000004 R09: 000000002c93a000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f243d816128 R14: 00007f243d816090 R15: 00007ffcabffc148
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x1204/0x1350 mm/filemap.c:858
Code: d9 c5 ff 4c 89 e7 48 c7 c6 e0 a3 d7 8b e8 94 07 29 ff 90 0f 0b e8 9c d9 c5 ff 4c 89 e7 48 c7 c6 80 98 d7 8b e8 7d 07 29 ff 90 <0f> 0b e8 85 d9 c5 ff 4c 89 e7 48 c7 c6 e0 a3 d7 8b e8 66 07 29 ff
RSP: 0018:ffffc9000216f1e0 EFLAGS: 00010246

RAX: 9039ff9dae0b3c00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8dee28f9 RDI: 00000000ffffffff
RBP: ffffc9000216f360 R08: ffffffff90108ab7 R09: 1ffffffff2021156
R10: dffffc0000000000 R11: fffffbfff2021157 R12: ffffea0001893000
R13: dffffc0000000000 R14: ffff888026487b80 R15: 0000000000000004
FS:  00007f243e41c6c0(0000) GS:ffff8881252a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b96c6a7d0 CR3: 000000005fe56000 CR4: 00000000003526f0