get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4e0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2c1/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:859!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6385 Comm: syz.0.147 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__filemap_add_folio+0x118b/0x12d0 mm/filemap.c:858
Code: 4c c7 ff 4c 89 e7 48 c7 c6 00 b3 94 8b e8 dd 5b 2e ff 90 0f 0b e8 15 4c c7 ff 4c 89 e7 48 c7 c6 e0 a9 94 8b e8 c6 5b 2e ff 90 <0f> 0b e8 fe 4b c7 ff 4c 89 e7 48 c7 c6 00 b3 94 8b e8 af 5b 2e ff
RSP: 0018:ffffc9000441f820 EFLAGS: 00010246
RAX: 1d087215e6ffdb00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8dab2a95 RDI: 00000000ffffffff
RBP: ffffc9000441f998 R08: ffffffff8fc3fc77 R09: 1ffffffff1f87f8e
R10: dffffc0000000000 R11: fffffbfff1f87f8f R12: ffffea0001e31e80
R13: dffffc0000000000 R14: ffffea0001e31e88 R15: 0000000000000002
FS:  00007f5ec465c6c0(0000) GS:ffff8881259bd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ec467cf98 CR3: 000000007d236000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_add_folio+0x26d/0x540 mm/filemap.c:966
 do_read_cache_folio+0x32e/0x590 mm/filemap.c:4063
 do_read_cache_page mm/filemap.c:4162 [inline]
 read_cache_page_gfp+0x2a/0x130 mm/filemap.c:4195
 btrfs_read_disk_super+0x206/0x560 fs/btrfs/volumes.c:1367
 btrfs_scan_one_device+0xd1/0x680 fs/btrfs/volumes.c:1475
 btrfs_get_tree_super fs/btrfs/super.c:1858 [inline]
 btrfs_get_tree_subvol fs/btrfs/super.c:2087 [inline]
 btrfs_get_tree+0x4ab/0x1930 fs/btrfs/super.c:2121
 vfs_get_tree+0x92/0x2a0 fs/super.c:1751
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3630 [inline]
 do_new_mount+0x302/0xa10 fs/namespace.c:3706
 do_mount fs/namespace.c:4029 [inline]
 __do_sys_mount fs/namespace.c:4218 [inline]
 __se_sys_mount+0x313/0x410 fs/namespace.c:4195
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ec378f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5ec465c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5ec39e6090 RCX: 00007f5ec378f749
RDX: 00002000000000c0 RSI: 0000200000000080 RDI: 00002000000001c0
RBP: 00007f5ec3813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004418 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5ec39e6128 R14: 00007f5ec39e6090 R15: 00007ffc3125d538
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__filemap_add_folio+0x118b/0x12d0 mm/filemap.c:858
Code: 4c c7 ff 4c 89 e7 48 c7 c6 00 b3 94 8b e8 dd 5b 2e ff 90 0f 0b e8 15 4c c7 ff 4c 89 e7 48 c7 c6 e0 a9 94 8b e8 c6 5b 2e ff 90 <0f> 0b e8 fe 4b c7 ff 4c 89 e7 48 c7 c6 00 b3 94 8b e8 af 5b 2e ff
RSP: 0018:ffffc9000441f820 EFLAGS: 00010246
RAX: 1d087215e6ffdb00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8dab2a95 RDI: 00000000ffffffff
RBP: ffffc9000441f998 R08: ffffffff8fc3fc77 R09: 1ffffffff1f87f8e
R10: dffffc0000000000 R11: fffffbfff1f87f8f R12: ffffea0001e31e80
R13: dffffc0000000000 R14: ffffea0001e31e88 R15: 0000000000000002
FS:  00007f5ec465c6c0(0000) GS:ffff888125abd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0019ea000 CR3: 000000007d236000 CR4: 00000000003526f0