fc_mount fs/namespace.c:1208 [inline]
 do_new_mount_fc fs/namespace.c:3651 [inline]
 do_new_mount fs/namespace.c:3727 [inline]
 path_mount+0x7b9/0x23a0 fs/namespace.c:4037
 do_mount fs/namespace.c:4050 [inline]
 __do_sys_mount fs/namespace.c:4238 [inline]
 __se_sys_mount fs/namespace.c:4215 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4215
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:870!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 3 UID: 0 PID: 22103 Comm: syz.0.4761 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__filemap_add_folio+0xf5b/0x11e0 mm/filemap.c:870
Code: 52 c7 ff 48 c7 c6 60 70 99 8b 4c 89 ef e8 bd 6b 11 00 90 0f 0b e8 e5 52 c7 ff 48 c7 c6 c0 70 99 8b 4c 89 ef e8 a6 6b 11 00 90 <0f> 0b e8 ce 52 c7 ff 90 0f 0b 90 e9 f2 fb ff ff e8 c0 52 c7 ff 48
RSP: 0018:ffffc9000393f7e8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88804ef28000 RSI: ffffffff81f5baca RDI: ffff88804ef28484
RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff908204d7 R11: 1ffffffff1c79ec9 R12: 0000000000000002
R13: ffffea000112c9c0 R14: 0000000000000000 R15: 1ffff92000727f27
FS:  00007fe40bd926c0(0000) GS:ffff8880d6d08000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000440 CR3: 000000002c6f0000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 filemap_add_folio+0x19a/0x610 mm/filemap.c:978
 ra_alloc_folio mm/readahead.c:453 [inline]
 page_cache_ra_order+0x635/0xf20 mm/readahead.c:512
 do_sync_mmap_readahead mm/filemap.c:3340 [inline]
 filemap_fault+0x1583/0x29a0 mm/filemap.c:3489
 __do_fault+0x10d/0x490 mm/memory.c:5280
 do_read_fault mm/memory.c:5698 [inline]
 do_fault mm/memory.c:5832 [inline]
 do_pte_missing+0xf4a/0x3ba0 mm/memory.c:4361
 handle_pte_fault mm/memory.c:6177 [inline]
 __handle_mm_fault+0x1556/0x2aa0 mm/memory.c:6318
 handle_mm_fault+0x589/0xd10 mm/memory.c:6487
 do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fe40af7367a
Code: fe 28 7f 27 62 e1 fe 28 7f 6f 01 62 e1 fe 28 7f 77 02 62 e1 fe 28 7f 7f 03 49 83 c0 1f 49 29 d0 48 8d 7c 17 61 e9 e6 04 00 00 <62> e1 fe 28 6f 1e 62 e1 fe 28 6f 56 01 62 b3 7d 20 3f c3 00 c5 fb
RSP: 002b:00007fe40bd91be8 EFLAGS: 00010246
RAX: 00007fe40bd91c10 RBX: 0000000000000008 RCX: 0000000000000040
RDX: 00000000000003ff RSI: 0000200000000440 RDI: 00007fe40bd91c10
RBP: 00007fe40bd91c10 R08: 00000000000003ff R09: 0000000000000000
R10: 0000200000000440 R11: 0000000000000000 R12: cccccccccccccccd
R13: 00007fe40b1e6218 R14: 00007fe40b1e6180 R15: 00007fff052edb08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0xf5b/0x11e0 mm/filemap.c:870
Code: 52 c7 ff 48 c7 c6 60 70 99 8b 4c 89 ef e8 bd 6b 11 00 90 0f 0b e8 e5 52 c7 ff 48 c7 c6 c0 70 99 8b 4c 89 ef e8 a6 6b 11 00 90 <0f> 0b e8 ce 52 c7 ff 90 0f 0b 90 e9 f2 fb ff ff e8 c0 52 c7 ff 48
RSP: 0018:ffffc9000393f7e8 EFLAGS: 00010293

RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88804ef28000 RSI: ffffffff81f5baca RDI: ffff88804ef28484
RBP: 0000000000112cc0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff908204d7 R11: 1ffffffff1c79ec9 R12: 0000000000000002
R13: ffffea000112c9c0 R14: 0000000000000000 R15: 1ffff92000727f27
FS:  00007fe40bd926c0(0000) GS:ffff8880d6d08000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000440 CR3: 000000002c6f0000 CR4: 0000000000352ef0