DUID 00:04:c7:bc:52:fc:07:c2:2f:22:cf:82:b1:d2:c3:2a:ec:fd
forked to background, child pid 3179
[   12.334836][ T3180] 8021q: adding VLAN 0 to HW filter on device bond0
[   12.337779][ T3180] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK

syzkaller
syzkaller login: [   69.874369][   T24] cfg80211: failed to load regulatory.db
Warning: Permanently added '10.128.0.133' (ECDSA) to the list of known hosts.
executing program
[  195.099574][ T3612] kmemleak: 7 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
[  195.135687][ T3614] loop0: detected capacity change from 0 to 2048
[  195.136719][ T3613] I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[  195.155166][ T3614] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
[  195.166831][ T3614] EXT4-fs error (device loop0): ext4_validate_block_bitmap:398: comm syz-executor114: bg 0: block 5: invalid block bitmap
[  195.179773][ T3614] EXT4-fs (loop0): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1 with error 28
[  195.192041][ T3614] EXT4-fs (loop0): This should not happen!! Data will be lost
[  195.192041][ T3614] 
[  195.201700][ T3614] EXT4-fs (loop0): Total free blocks count 0
[  195.207690][ T3614] EXT4-fs (loop0): Free/Dirty block details
[  195.213559][ T3614] EXT4-fs (loop0): free_blocks=0
[  195.218592][ T3614] EXT4-fs (loop0): dirty_blocks=16
[  195.223686][ T3614] EXT4-fs (loop0): Block reservation details
[  195.229684][ T3614] EXT4-fs (loop0): i_reserved_data_blocks=1
[  195.237389][    T8] EXT4-fs (loop0): Delayed block allocation failed for inode 18 at logical offset 2 with max blocks 30 with error 28
executing program
[  200.464891][ T3618] loop0: detected capacity change from 0 to 2048
[  200.474971][ T3618] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
[  200.486739][ T3618] EXT4-fs error (device loop0): ext4_validate_block_bitmap:398: comm syz-executor114: bg 0: block 5: invalid block bitmap
[  200.499571][ T3618] EXT4-fs (loop0): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 1 with error 28
[  200.511832][ T3618] EXT4-fs (loop0): This should not happen!! Data will be lost
[  200.511832][ T3618] 
[  200.521554][ T3618] EXT4-fs (loop0): Total free blocks count 0
[  200.527570][ T3618] EXT4-fs (loop0): Free/Dirty block details
[  200.533450][ T3618] EXT4-fs (loop0): free_blocks=0
[  200.538399][ T3618] EXT4-fs (loop0): dirty_blocks=16
[  200.543568][ T3618] EXT4-fs (loop0): Block reservation details
[  200.549636][ T3618] EXT4-fs (loop0): i_reserved_data_blocks=1
[  200.556803][   T25] EXT4-fs (loop0): Delayed block allocation failed for inode 18 at logical offset 2 with max blocks 30 with error 28
[  201.646839][ T3612] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff888111c8a1e0 (size 32):
  comm "syz-executor114", pid 3614, jiffies 4294956785 (age 12.710s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8178729a>] __insert_pending.isra.0+0xaa/0xf0
    [<ffffffff8178b044>] ext4_es_insert_delayed_block+0x224/0x230
    [<ffffffff817a7ae5>] ext4_da_get_block_prep+0x3a5/0x7e0
    [<ffffffff81653016>] __block_write_begin_int+0x1d6/0x9d0
    [<ffffffff8179cf7b>] ext4_da_write_inline_data_begin+0x39b/0xb10
    [<ffffffff817b0307>] ext4_da_write_begin+0x477/0x4e0
    [<ffffffff8148755f>] generic_perform_write+0xff/0x2b0
    [<ffffffff8178c54b>] ext4_buffered_write_iter+0xbb/0x1d0
    [<ffffffff8178c71f>] ext4_file_write_iter+0xbf/0xbf0
    [<ffffffff815d8517>] do_iter_readv_writev+0x147/0x210
    [<ffffffff815d9afc>] do_iter_write+0xdc/0x300
    [<ffffffff815d9d59>] vfs_iter_write+0x39/0x60
    [<ffffffff8163eb44>] iter_file_splice_write+0x434/0x660
    [<ffffffff8163c57b>] direct_splice_actor+0x4b/0x70
    [<ffffffff8163cd19>] splice_direct_to_actor+0x149/0x350
    [<ffffffff8163d008>] do_splice_direct+0xe8/0x150

BUG: memory leak
unreferenced object 0xffff888111c8a260 (size 32):
  comm "syz-executor114", pid 3618, jiffies 4294957317 (age 7.390s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8178729a>] __insert_pending.isra.0+0xaa/0xf0
    [<ffffffff8178b044>] ext4_es_insert_delayed_block+0x224/0x230
    [<ffffffff817a7ae5>] ext4_da_get_block_prep+0x3a5/0x7e0
    [<ffffffff81653016>] __block_write_begin_int+0x1d6/0x9d0
    [<ffffffff8179cf7b>] ext4_da_write_inline_data_begin+0x39b/0xb10
    [<ffffffff817b0307>] ext4_da_write_begin+0x477/0x4e0
    [<ffffffff8148755f>] generic_perform_write+0xff/0x2b0
    [<ffffffff8178c54b>] ext4_buffered_write_iter+0xbb/0x1d0
    [<ffffffff8178c71f>] ext4_file_write_iter+0xbf/0xbf0
    [<ffffffff815d8517>] do_iter_readv_writev+0x147/0x210
    [<ffffffff815d9afc>] do_iter_write+0xdc/0x300
    [<ffffffff815d9d59>] vfs_iter_write+0x39/0x60
    [<ffffffff8163eb44>] iter_file_splice_write+0x434/0x660
    [<ffffffff8163c57b>] direct_splice_actor+0x4b/0x70
    [<ffffffff8163cd19>] splice_direct_to_actor+0x149/0x350
    [<ffffffff8163d008>] do_splice_direct+0xe8/0x150

[  207.830799][ T3612] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)