syzbot

 do_initcall_level init/main.c:1331 [inline]
 do_initcalls init/main.c:1347 [inline]
 do_basic_setup init/main.c:1366 [inline]
 kernel_init_freeable+0x5c2/0x910 init/main.c:1579
 kernel_init+0x1c/0x2b0 init/main.c:1469
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
kernel BUG at mm/filemap.c:867!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 6030 Comm: syz-executor263 Not tainted 6.17.0-rc1-syzkaller-00111-g24ea63ea3877 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__filemap_add_folio+0xf5b/0x11e0 mm/filemap.c:867
Code: 7a c8 ff 48 c7 c6 20 24 b9 8b 4c 89 ef e8 9d 28 11 00 90 0f 0b e8 95 7a c8 ff 48 c7 c6 80 24 b9 8b 4c 89 ef e8 86 28 11 00 90 <0f> 0b e8 7e 7a c8 ff 90 0f 0b 90 e9 f2 fb ff ff e8 70 7a c8 ff 48
RSP: 0018:ffffc90002f97488 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888029eaa440 RSI: ffffffff81f318ba RDI: ffff888029eaa884
RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90ab3697 R11: 0000000000000001 R12: 0000000000000002
R13: ffffea0001d4b080 R14: 0000000000000000 R15: 0000000000000150
FS:  00005555688ea480(0000) GS:ffff8881246bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe89af1e40 CR3: 00000000720e3000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_add_folio+0x10e/0x220 mm/filemap.c:969
 ra_alloc_folio mm/readahead.c:448 [inline]
 page_cache_ra_order+0x5a7/0xd70 mm/readahead.c:506
 page_cache_sync_ra+0x4e9/0xa00 mm/readahead.c:619
 filemap_get_pages+0xb62/0x1c20 mm/filemap.c:2603
 filemap_splice_read+0x5cb/0xd60 mm/filemap.c:2991
 do_splice_read fs/splice.c:979 [inline]
 do_splice_read+0x282/0x370 fs/splice.c:953
 splice_direct_to_actor+0x2a1/0xa30 fs/splice.c:1083
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0x174/0x240 fs/splice.c:1227
 do_sendfile+0xb06/0xe50 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64 fs/read_write.c:1417 [inline]
 __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1417
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffafed871a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe89af2f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ffe89af2f90 RCX: 00007ffafed871a9
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000000f4240 R09: 00000000000f4240
R10: 0000000000200000 R11: 0000000000000246 R12: 00000000000f4240
R13: 0000000000010850 R14: 00007ffe89af2f7c R15: 00007ffe89af2f80
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0xf5b/0x11e0 mm/filemap.c:867
Code: 7a c8 ff 48 c7 c6 20 24 b9 8b 4c 89 ef e8 9d 28 11 00 90 0f 0b e8 95 7a c8 ff 48 c7 c6 80 24 b9 8b 4c 89 ef e8 86 28 11 00 90 <0f> 0b e8 7e 7a c8 ff 90 0f 0b 90 e9 f2 fb ff ff e8 70 7a c8 ff 48
RSP: 0018:ffffc90002f97488 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888029eaa440 RSI: ffffffff81f318ba RDI: ffff888029eaa884
RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90ab3697 R11: 0000000000000001 R12: 0000000000000002
R13: ffffea0001d4b080 R14: 0000000000000000 R15: 0000000000000150
FS:  00005555688ea480(0000) GS:ffff8881247bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000720e3000 CR4: 00000000003526f0