[syzbot] Monthly ext4 report (Aug 2023)

[syzbot]

Hello ext4 maintainers/developers,

This is a 31-day syzbot report for the ext4 subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/ext4

During the period, 6 new issues were detected and 1 were fixed.
In total, 49 issues are still open and 113 have been fixed so far.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  2159    Yes   WARNING: locking bug in ext4_move_extents
                   https://syzkaller.appspot.com/bug?extid=7f4a6f7f7051474e40ad
<2>  178     Yes   WARNING: locking bug in __ext4_ioctl
                   https://syzkaller.appspot.com/bug?extid=a537ff48a9cb940d314c
<3>  125     No    possible deadlock in evict (3)
                   https://syzkaller.appspot.com/bug?extid=dd426ae4af71f1e74729
<4>  85      Yes   WARNING: locking bug in ext4_ioctl
                   https://syzkaller.appspot.com/bug?extid=a3c8e9ac9f9d77240afd
<5>  52      No    INFO: task hung in __writeback_inodes_sb_nr (6)
                   https://syzkaller.appspot.com/bug?extid=38d04642cea49f3a3d2e
<6>  39      Yes   INFO: task hung in sync_inodes_sb (5)
                   https://syzkaller.appspot.com/bug?extid=30476ec1b6dc84471133
<7>  26      Yes   kernel BUG in ext4_write_inline_data_end
                   https://syzkaller.appspot.com/bug?extid=198e7455f3a4f38b838a
<8>  9       Yes   INFO: task hung in find_inode_fast (2)
                   https://syzkaller.appspot.com/bug?extid=adfd362e7719c02b3015
<9>  6       Yes   KASAN: out-of-bounds Read in ext4_ext_remove_space
                   https://syzkaller.appspot.com/bug?extid=6e5f2db05775244c73b7
<10> 6       Yes   KASAN: slab-use-after-free Read in ext4_convert_inline_data_nolock
                   https://syzkaller.appspot.com/bug?extid=db6caad9ebd2c8022b41

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