do_one_tree fs/dcache.c:1795 [inline]
 shrink_dcache_for_umount+0x101/0x6c0 fs/dcache.c:1812
 generic_shutdown_super+0x7e/0x360 fs/super.c:625
 kill_anon_super+0x3a/0x60 fs/super.c:1232
 deactivate_locked_super+0xc1/0x1b0 fs/super.c:477
 deactivate_super fs/super.c:510 [inline]
 deactivate_super+0xe7/0x110 fs/super.c:506
 cleanup_mnt+0x21f/0x450 fs/namespace.c:1317
------------[ cut here ]------------
kernel BUG at mm/filemap.c:858!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 18934 Comm: syz.2.3350 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__filemap_add_folio+0xfc2/0x12a0 mm/filemap.c:858
Code: 4a c1 ff 48 c7 c6 60 91 bd 8b 4c 89 ef e8 c6 ea 12 00 90 0f 0b e8 fe 49 c1 ff 48 c7 c6 c0 91 bd 8b 4c 89 ef e8 af ea 12 00 90 <0f> 0b e8 e7 49 c1 ff 48 c7 c6 40 92 bd 8b 4c 89 ef e8 98 ea 12 00
RSP: 0018:ffffc900037a7438 EFLAGS: 00010246
RAX: 0000000000080000 RBX: 0000000000112cc0 RCX: ffffc90011268000
RDX: 0000000000080000 RSI: ffffffff825b20a8 RDI: ffff88807bc02a04
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002
R13: ffffea0001fe41c0 R14: 0000000000000140 R15: 0000000000000000
FS:  00007f9be93046c0(0000) GS:ffff8881243ec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000003c7030 CR3: 00000000755a1000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_add_folio+0x1d3/0x630 mm/filemap.c:966
 ra_alloc_folio mm/readahead.c:470 [inline]
 page_cache_ra_order+0x602/0xed0 mm/readahead.c:535
 page_cache_sync_ra+0x6ac/0xae0 mm/readahead.c:649
 filemap_get_pages+0x6cf/0x2030 mm/filemap.c:2704
 filemap_splice_read+0x46e/0xc90 mm/filemap.c:3093
 do_splice_read fs/splice.c:980 [inline]
 do_splice_read+0x285/0x370 fs/splice.c:954
 splice_direct_to_actor+0x2a1/0xa30 fs/splice.c:1084
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x174/0x240 fs/splice.c:1228
 do_sendfile+0xadc/0xe20 fs/read_write.c:1371
 __do_sys_sendfile64 fs/read_write.c:1432 [inline]
 __se_sys_sendfile64 fs/read_write.c:1418 [inline]
 __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1418
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9be839ce59
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:00007f9be9304028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f9be8616090 RCX: 00007f9be839ce59
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000005
RBP: 00007f9be8432e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9be8616128 R14: 00007f9be8616090 R15: 00007ffea6bc8af8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0xfc2/0x12a0 mm/filemap.c:858
Code: 4a c1 ff 48 c7 c6 60 91 bd 8b 4c 89 ef e8 c6 ea 12 00 90 0f 0b e8 fe 49 c1 ff 48 c7 c6 c0 91 bd 8b 4c 89 ef e8 af ea 12 00 90 <0f> 0b e8 e7 49 c1 ff 48 c7 c6 40 92 bd 8b 4c 89 ef e8 98 ea 12 00
RSP: 0018:ffffc900037a7438 EFLAGS: 00010246
RAX: 0000000000080000 RBX: 0000000000112cc0 RCX: ffffc90011268000
RDX: 0000000000080000 RSI: ffffffff825b20a8 RDI: ffff88807bc02a04
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002
R13: ffffea0001fe41c0 R14: 0000000000000140 R15: 0000000000000000
FS:  00007f9be93046c0(0000) GS:ffff8881242ec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43badea2f8 CR3: 00000000755a1000 CR4: 00000000003526f0