EXT4-fs error (device loop5): ext4_validate_block_bitmap:405: comm syz-executor351: bg 0: block 5: invalid block bitmap
EXT4-fs error (device loop4): ext4_validate_block_bitmap:405: comm syz-executor351: bg 0: block 5: invalid block bitmap
EXT4-fs error (device loop2): ext4_validate_block_bitmap:405: comm syz-executor351: bg 0: block 5: invalid block bitmap
------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:231!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8040 Comm: syz-executor351 Not tainted 4.14.298-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
EXT4-fs error (device loop0) in ext4_free_blocks:5010: Corrupt filesystem
task: ffff88809532a240 task.stack: ffff8880b3bf8000
RIP: 0010:ext4_write_inline_data+0x2e6/0x380 fs/ext4/inline.c:231
RSP: 0018:ffff8880b3bff460 EFLAGS: 00010297
EXT4-fs (loop0): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1022 with error 28
RAX: ffff88809532a240 RBX: ffff8880a3fb1930 RCX: 000000000000000b
RDX: 0000000000000000 RSI: ffff8880b3bff4e8 RDI: ffff8880a3fb1df8
RBP: 000000000000000b R08: 0000000000000ff5 R09: 0000000000000000
R10: ffff8880b3bff438 R11: 0000000000000000 R12: 0000000000000ff5
R13: ffff8880b3bff4e8 R14: ffff8880a3fb1df6 R15: ffff8880a3fb1798
FS:  00007f5b2f89c700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561b81db93c8 CR3: 00000000b3dd5000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
EXT4-fs (loop0): This should not happen!! Data will be lost

Call Trace:
 ext4_write_inline_data_end+0x1db/0x490 fs/ext4/inline.c:769
 ext4_write_end+0x18d/0xca0 fs/ext4/inode.c:1429
 ext4_da_write_end+0x6da/0x8e0 fs/ext4/inode.c:3216
 generic_perform_write+0x268/0x420 mm/filemap.c:3066
EXT4-fs (loop0): Total free blocks count 0
 __generic_file_write_iter+0x227/0x590 mm/filemap.c:3180
 ext4_file_write_iter+0x276/0xd20 fs/ext4/file.c:270
EXT4-fs error (device loop5) in ext4_free_blocks:5010: Corrupt filesystem
EXT4-fs (loop5): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 774 with error 28
EXT4-fs (loop5): This should not happen!! Data will be lost

 call_write_iter include/linux/fs.h:1780 [inline]
 do_iter_readv_writev+0x4cf/0x5f0 fs/read_write.c:675
 do_iter_write+0x152/0x550 fs/read_write.c:954
 vfs_iter_write+0x70/0xa0 fs/read_write.c:967
 iter_file_splice_write+0x52b/0xa90 fs/splice.c:749
EXT4-fs (loop0): Free/Dirty block details
EXT4-fs (loop5): Total free blocks count 0
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x115/0x160 fs/splice.c:1018
 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973
EXT4-fs (loop5): Free/Dirty block details
 do_splice_direct+0x164/0x210 fs/splice.c:1061
 do_sendfile+0x47f/0xb30 fs/read_write.c:1441
 SYSC_sendfile64 fs/read_write.c:1502 [inline]
 SyS_sendfile64+0xff/0x110 fs/read_write.c:1488
audit: type=1804 audit(1667652064.078:4): pid=7996 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor351" name="/root/file0/bus" dev="loop1" ino=18 res=1
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
Code: 
EXT4-fs error (device loop2) in ext4_free_blocks:5010: Corrupt filesystem
5f e9 0f 15 9c ff e8 0a 15 9c ff 45 8d 64 2c c4 b8 3c 00 00 00 29 e8 89 04 24 e9 e7 fe ff ff 
EXT4-fs (loop0): free_blocks=0
e8 f1 14 9c ff 0f 0b e8 ea 14 9c ff <0f> 0b e8 c3 d1 
EXT4-fs (loop2): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1060 with error 28
c5 ff e9 2a fe ff ff 4c 89 f7 e8 b6 d1 c5 
EXT4-fs (loop2): This should not happen!! Data will be lost

ff e9 
RIP: ext4_write_inline_data+0x2e6/0x380 fs/ext4/inline.c:231 RSP: ffff8880b3bff460
---[ end trace 70b46edd3f5dd3ee ]---
EXT4-fs (loop2): Total free blocks count 0