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kernel BUG at fs/ext4/mballoc.c:4687!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 9663 Comm: syz.4.386 Not tainted 6.14.0-rc6-syzkaller-g0a6021b3fc20 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ext4_mb_use_inode_pa+0x53c/0x5a0 fs/ext4/mballoc.c:4687
lr : ext4_mb_use_inode_pa+0x53c/0x5a0 fs/ext4/mballoc.c:4687
sp : ffff80009cee68d0
x29: ffff80009cee6920 x28: ffff0000ede34670 x27: 0000000000000002
x26: 0000000000000201 x25: ffff0000ede34624 x24: 1fffe0001dbc68c4
x23: dfff800000000000 x22: 00000000ffffffff x21: 1fffe0001e389a4c
x20: 0000000000000001 x19: ffff0000f1c4d260 x18: 1fffe0001d8d56ab
x17: ffff80008fbbd000 x16: ffff800080481b44 x15: 0000000000000001
x14: 1fffe0001e389a49 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000211 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000d19c0000 x7 : ffff8000810f1980 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff0000ede3461c
x2 : ffff0000ede34620 x1 : 0000000000000002 x0 : 0000000000000001
Call trace:
 ext4_mb_use_inode_pa+0x53c/0x5a0 fs/ext4/mballoc.c:4687 (P)
 ext4_mb_use_preallocated+0x4bc/0x10c4 fs/ext4/mballoc.c:4904
 ext4_mb_new_blocks+0x5e4/0x448c fs/ext4/mballoc.c:6208
 ext4_ext_map_blocks+0x150c/0x6600 fs/ext4/extents.c:4379
 ext4_map_create_blocks fs/ext4/inode.c:516 [inline]
 ext4_map_blocks+0x710/0x15d0 fs/ext4/inode.c:702
 _ext4_get_block+0x1c8/0x5f0 fs/ext4/inode.c:781
 ext4_get_block_unwritten+0x3c/0x114 fs/ext4/inode.c:814
 ext4_block_write_begin+0x374/0xf24 fs/ext4/inode.c:1063
 ext4_write_begin+0x61c/0x115c
 ext4_da_write_begin+0x354/0x98c fs/ext4/inode.c:2925
 generic_perform_write+0x29c/0x868 mm/filemap.c:4188
 ext4_buffered_write_iter+0x2c0/0x530 fs/ext4/file.c:299
 ext4_file_write_iter+0x1ac/0x1980 fs/ext4/file.c:717
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x704/0xa9c fs/read_write.c:679
 ksys_write+0x15c/0x26c fs/read_write.c:731
 __do_sys_write fs/read_write.c:742 [inline]
 __se_sys_write fs/read_write.c:739 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:739
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: d4210000 97d66caa d4210000 97d66ca8 (d4210000) 
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