------------[ cut here ]------------
kernel BUG at fs/buffer.c:555!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7463 Comm: syz.2.1535 Tainted: G        W         5.4.290-syzkaller-00001-g986c38813dff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:mark_buffer_dirty_inode+0x2fb/0x300 fs/buffer.c:555
Code: ef e8 e9 c3 ea ff 48 8b 45 b8 49 89 45 00 48 89 df e8 49 35 b6 02 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b5 22 ba ff <0f> 0b 0f 1f 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 50 49 89 ff
RSP: 0018:ffff8881f0e1f800 EFLAGS: 00010293
RAX: ffffffff81ab781b RBX: 1ffff110390e4140 RCX: ffff8881f36cee40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0007146bc0
RBP: ffff8881f0e1f850 R08: ffffffff81882ff8 R09: fffff94000e28d79
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8881c8720960 R14: ffff8881dd7a1f18 R15: ffff8881c8720a00
FS:  00007fcf9b3e66c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6fd9d8dffc CR3: 00000001e048d000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fat_add_entries+0xead/0x2ee0 fs/fat/dir.c:1362
 msdos_add_entry+0x2dc/0x580 fs/fat/namei_msdos.c:250
 msdos_mkdir+0x3b9/0x5c0 fs/fat/namei_msdos.c:371
 vfs_mkdir+0x4cf/0x6b0 fs/namei.c:3965
 do_mkdirat+0x1a6/0x2c0 fs/namei.c:3987
 __do_sys_mkdirat fs/namei.c:3998 [inline]
 __se_sys_mkdirat fs/namei.c:3996 [inline]
 __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3996
 do_syscall_64+0xd8/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7fcf9cdbf969
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:00007fcf9b3e6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fcf9cfe7160 RCX: 00007fcf9cdbf969
RDX: 0000000000000000 RSI: 0000200000002040 RDI: ffffffffffffff9c
RBP: 00007fcf9ce41ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcf9cfe7160 R15: 00007fffe8a11db8
Modules linked in:
---[ end trace d948c389599cd0ed ]---
RIP: 0010:mark_buffer_dirty_inode+0x2fb/0x300 fs/buffer.c:555
Code: ef e8 e9 c3 ea ff 48 8b 45 b8 49 89 45 00 48 89 df e8 49 35 b6 02 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b5 22 ba ff <0f> 0b 0f 1f 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 50 49 89 ff
RSP: 0018:ffff8881f0e1f800 EFLAGS: 00010293
RAX: ffffffff81ab781b RBX: 1ffff110390e4140 RCX: ffff8881f36cee40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0007146bc0
RBP: ffff8881f0e1f850 R08: ffffffff81882ff8 R09: fffff94000e28d79
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8881c8720960 R14: ffff8881dd7a1f18 R15: ffff8881c8720a00
FS:  00007fcf9b3e66c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bee9b0000 CR3: 00000001e048d000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400