BTRFS info (device loop2): force clearing of disk cache
BTRFS info (device loop2): enabling auto defrag
BTRFS info (device loop2): scrub: started on devid 1
assertion failed: !folio_test_partial_kmap(folio) :: 0, in fs/btrfs/scrub.c:697
------------[ cut here ]------------
kernel BUG at fs/btrfs/scrub.c:697!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 18860 Comm: syz.2.3843 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:scrub_stripe_get_kaddr.isra.0+0x155/0x1d0 fs/btrfs/scrub.c:697
Code: 74 2a e8 fe d2 c4 fd 41 b8 b9 02 00 00 31 d2 48 c7 c1 40 ee dd 8b 48 c7 c6 60 f3 dd 8b 48 c7 c7 c0 ee dd 8b e8 2c 27 a3 fd 90 <0f> 0b e8 d4 d2 c4 fd 41 b8 b8 02 00 00 31 d2 48 c7 c1 40 ee dd 8b
RSP: 0018:ffffc9000bfa7358 EFLAGS: 00010282
RAX: 000000000000004f RBX: 0000000000000000 RCX: ffffc9000d440000
RDX: 0000000000000000 RSI: ffffffff819c0a36 RDI: 0000000000000005
RBP: ffff888080900000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 000000000000000c
R13: 000000000000000c R14: ffff88802e67d800 R15: ffff888080900000
FS:  00007fa02d6616c0(0000) GS:ffff8881249da000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd6bfd8b68 CR3: 000000006630e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 scrub_bio_add_sector fs/btrfs/scrub.c:932 [inline]
 scrub_submit_initial_read+0xfb8/0x10e0 fs/btrfs/scrub.c:1897
 submit_initial_group_read+0x2a7/0x5e0 fs/btrfs/scrub.c:1952
 flush_scrub_stripes+0x950/0x12b0 fs/btrfs/scrub.c:1973
 scrub_stripe+0x945/0x1940 fs/btrfs/scrub.c:2516
 scrub_chunk+0x303/0x4f0 fs/btrfs/scrub.c:2575
 scrub_enumerate_chunks+0x89c/0x18c0 fs/btrfs/scrub.c:2839
 btrfs_scrub_dev+0x658/0x1740 fs/btrfs/scrub.c:3153
 btrfs_ioctl_scrub fs/btrfs/ioctl.c:3163 [inline]
 btrfs_ioctl+0x2497/0x5590 fs/btrfs/ioctl.c:5307
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 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
RIP: 0033:0x7fa02c78eec9
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:00007fa02d661038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa02c9e5fa0 RCX: 00007fa02c78eec9
RDX: 0000200000000000 RSI: 00000000c400941b RDI: 0000000000000004
RBP: 00007fa02c811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa02c9e6038 R14: 00007fa02c9e5fa0 R15: 00007fff344d2bf8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:scrub_stripe_get_kaddr.isra.0+0x155/0x1d0 fs/btrfs/scrub.c:697
Code: 74 2a e8 fe d2 c4 fd 41 b8 b9 02 00 00 31 d2 48 c7 c1 40 ee dd 8b 48 c7 c6 60 f3 dd 8b 48 c7 c7 c0 ee dd 8b e8 2c 27 a3 fd 90 <0f> 0b e8 d4 d2 c4 fd 41 b8 b8 02 00 00 31 d2 48 c7 c1 40 ee dd 8b
RSP: 0018:ffffc9000bfa7358 EFLAGS: 00010282
RAX: 000000000000004f RBX: 0000000000000000 RCX: ffffc9000d440000
RDX: 0000000000000000 RSI: ffffffff819c0a36 RDI: 0000000000000005
RBP: ffff888080900000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 000000000000000c
R13: 000000000000000c R14: ffff88802e67d800 R15: ffff888080900000
FS:  00007fa02d6616c0(0000) GS:ffff888124ada000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000001c0 CR3: 000000006630e000 CR4: 0000000000350ef0