[syzbot] Monthly block report (Sep 2025)

[syzbot]

Hello block maintainers/developers,

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

During the period, 1 new issues were detected and 0 were fixed.
In total, 44 issues are still open and 104 have already been fixed.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  44250   Yes   possible deadlock in blk_mq_update_nr_hw_queues
                   https://syzkaller.appspot.com/bug?extid=6279b273d888c2017726
<2>  43987   Yes   possible deadlock in __del_gendisk
                   https://syzkaller.appspot.com/bug?extid=2e9e529ac0b319316453
<3>  7133    Yes   KMSAN: kernel-infoleak in filemap_read
                   https://syzkaller.appspot.com/bug?extid=905d785c4923bea2c1db
<4>  3286    No    INFO: task hung in read_part_sector (2)
                   https://syzkaller.appspot.com/bug?extid=82de77d3f217960f087d
<5>  2746    Yes   BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (7)
                   https://syzkaller.appspot.com/bug?extid=74f79df25c37437e4d5a
<6>  2614    Yes   INFO: task hung in bdev_release
                   https://syzkaller.appspot.com/bug?extid=4da851837827326a7cd4
<7>  1688    Yes   INFO: task hung in blkdev_fallocate
                   https://syzkaller.appspot.com/bug?extid=39b75c02b8be0a061bfc
<8>  1586    Yes   INFO: task hung in bdev_open
                   https://syzkaller.appspot.com/bug?extid=5c6179f2c4f1e111df11
<9>  1007    Yes   INFO: task hung in sync_bdevs (3)
                   https://syzkaller.appspot.com/bug?extid=97bc0b256218ed6df337
<10> 606     Yes   possible deadlock in elevator_change
                   https://syzkaller.appspot.com/bug?extid=ccae337393ac17091c34

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