diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2015-10-21 19:20:18 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-10-21 22:43:42 +0200 |
| commit | ac6fc48c9fb7d3220ec4e0be0c29bb314ea75f9f (patch) | |
| tree | b9f2aed362449db3f27c233202eb08d5267c5812 /lib/percpu-refcount.c | |
| parent | block: generic request_queue reference counting (diff) | |
| download | linux-ac6fc48c9fb7d3220ec4e0be0c29bb314ea75f9f.tar.xz linux-ac6fc48c9fb7d3220ec4e0be0c29bb314ea75f9f.zip | |
block: move blk_integrity to request_queue
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: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'lib/percpu-refcount.c')
0 files changed, 0 insertions, 0 deletions