Zero length message leads to an empty skb
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4_jbd2.c:54!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 7496 Comm: syz.4.180 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : ext4_put_nojournal fs/ext4/ext4_jbd2.c:54 [inline]
pc : __ext4_journal_stop+0x18c/0x190 fs/ext4/ext4_jbd2.c:126
lr : ext4_put_nojournal fs/ext4/ext4_jbd2.c:54 [inline]
lr : __ext4_journal_stop+0x18c/0x190 fs/ext4/ext4_jbd2.c:126
sp : ffff80009ce175a0
x29: ffff80009ce175a0 x28: dfff800000000000 x27: ffff7000139c2ec4
x26: 1fffe0001ec6b18f x25: 0000000000000000 x24: ffff0000f6358c78
x23: 0000000000000001 x22: 0000000000000016 x21: 0000000000000000
x20: ffff80008ec6fbab x19: 000000000000034a x18: 1fffe000337e8e88
x17: ffff80008f56e000 x16: ffff80008ad3f6f4 x15: 0000000000000001
x14: 1fffffbff871d56e x13: 0000000000000000 x12: 0000000000000000
x11: ffff7fbff871d56f x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c9e4bd00 x7 : ffff80008048e890 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff8000810c5974
x2 : 0000000000000000 x1 : 000000000000034a x0 : ffff80008ec6fbab
Call trace:
 ext4_put_nojournal fs/ext4/ext4_jbd2.c:54 [inline] (P)
 __ext4_journal_stop+0x18c/0x190 fs/ext4/ext4_jbd2.c:126 (P)
 ext4_write_inline_data_end+0x6a0/0xa40 fs/ext4/inline.c:842
 ext4_da_write_end+0x204/0xb24 fs/ext4/inode.c:3285
 generic_perform_write+0x518/0x7bc mm/filemap.c:4196
 ext4_buffered_write_iter+0x2b8/0x528 fs/ext4/file.c:299
 ext4_file_write_iter+0x1d8/0x1864 fs/ext4/file.c:-1
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_write+0x120/0x210 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: 54fff86b 97ef8feb 17ffffc1 97dad43d (d4210000) 
---[ end trace 0000000000000000 ]---