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| author | Greg Edwards <gedwards@ddn.com> | 2018-08-08 13:27:53 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-08-09 08:25:04 -0600 |
| commit | d6c02a9beb67f13d5f14f23e72fa9981e8b84477 (patch) | |
| tree | cc921bc4fba16e9fc8e072f7d9d112bba6e3162e /block | |
| parent | 4884f8bf87f6af065b8268b3baf0d16aff95de4a (diff) | |
| download | linux-0-day-d6c02a9beb67f13d5f14f23e72fa9981e8b84477.tar.gz linux-0-day-d6c02a9beb67f13d5f14f23e72fa9981e8b84477.tar.xz | |
block: bvec_nr_vecs() returns value for wrong slab
In commit ed996a52c868 ("block: simplify and cleanup bvec pool
handling"), the value of the slab index is incremented by one in
bvec_alloc() after the allocation is done to indicate an index value of
0 does not need to be later freed.
bvec_nr_vecs() was not updated accordingly, and thus returns the wrong
value. Decrement idx before performing the lookup.
Fixes: ed996a52c868 ("block: simplify and cleanup bvec pool handling")
Signed-off-by: Greg Edwards <gedwards@ddn.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/bio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/bio.c b/block/bio.c index b832151cd0bf4..04969b392c72d 100644 --- a/block/bio.c +++ b/block/bio.c @@ -158,7 +158,7 @@ out: unsigned int bvec_nr_vecs(unsigned short idx) { - return bvec_slabs[idx].nr_vecs; + return bvec_slabs[--idx].nr_vecs; } void bvec_free(mempool_t *pool, struct bio_vec *bv, unsigned int idx) |