INFO: task hung in evict on v7.3-rc2

INFO: task hung in evict on v7.3-rc2

[CJ]

Hi,


syzbot reported "INFO: task hung in evict" on linux-6.1. The same
failure is still reproducible on v7.3-rc2 with the reproducer below.


Tested kernel:
  Linux v7.3-rc2
  HEAD df2908090cda368b01ff43709f51890076c56157


Observed failure:
__filemap_get_folio_mpol+0x71c/0x1160
truncate_inode_pages_range+0x333/0xdf0
evict+0x7b6/0x970
dispose_list+0x124/0x210
evict_inodes+0x5b7/0x690
generic_shutdown_super+0xc4/0x400
kill_block_super+0x38/0xa0
deactivate_locked_super+0xb7/0x130
deactivate_super+0xb0/0xd0
cleanup_mnt+0x378/0x510
task_work_run+0x16e/0x270
exit_to_user_mode_loop+0x1fd/0x660
do_syscall_64+0x4f7/0x700
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f97279afebb
</TASK>


The console does not identify the lock or page owner, so this is a report of a still-reproducible hang rather than a bisected root cause.


This is a report of a still-reproducible failure, not a bisected root cause.


Reproducer:
  SYZ reproducer: https://pastebin.com/raw/HXXLKEaG


Artifacts:
  console: https://pastebin.com/raw/ME8mGhPy
  kernel config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=6a5cbd268406bf43


Thanks.