• Dan Williams's avatar
    block: move blk_integrity to request_queue · ac6fc48c
    Dan Williams authored
    A trace like the following proceeds a crash in bio_integrity_process()
    when it goes to use an already freed blk_integrity profile.
    
     BUG: unable to handle kernel paging request at ffff8800d31b10d8
     IP: [<ffff8800d31b10d8>] 0xffff8800d31b10d8
     PGD 2f65067 PUD 21fffd067 PMD 80000000d30001e3
     Oops: 0011 [#1] SMP
     Dumping ftrace buffer:
     ---------------------------------
        ndctl-2222    2.... 44526245us : disk_release: pmem1s
     systemd--2223    4.... 44573945us : bio_integrity_endio: pmem1s
        <...>-409     4.... 44574005us : bio_integrity_process: pmem1s
     ---------------------------------
    [..]
      Call Trace:
      [<ffffffff8144e0f9>] ? bio_integrity_process+0x159/0x2d0
      [<ffffffff8144e4f6>] bio_integrity_verify_fn+0x36/0x60
      [<ffffffff810bd2dc>] process_one_work+0x1cc/0x4e0
    
    Given that a request_queue is pinned while i/o is in flight and that a
    gendisk is allowed to have a shorter lifetime, move blk_integrity to
    request_queue to satisfy requests arriving after the gendisk has been
    torn down.
    
    Cc: Christoph Hellwig <hch@lst.de>
    Cc: Martin K. Petersen <martin.petersen@oracle.com>
    [martin: fix the CONFIG_BLK_DEV_INTEGRITY=n case]
    Tested-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
    Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
    Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    ac6fc48c
genhd.h 22.8 KB