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| author | Matias Bjørling <m@bjorling.me> | 2015-12-29 14:37:56 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-12-29 08:28:32 -0700 |
| commit | c3293a9ac2a4f9160b85b5e986a8e0c54986e7f7 (patch) | |
| tree | 229096c83ebcbb4e8fcc03d559cb29bb29f2df57 /drivers/lightnvm | |
| parent | 48cc661e7f4cec80b6aa894cc6902c292f201ea8 (diff) | |
| download | blackbird-op-linux-c3293a9ac2a4f9160b85b5e986a8e0c54986e7f7.tar.gz blackbird-op-linux-c3293a9ac2a4f9160b85b5e986a8e0c54986e7f7.zip | |
lightnvm: wrong offset in bad blk lun calculation
dev->nr_luns reports the total number of luns available in a device
while dev->luns_per_chnl is the number of luns per channel.
When multiple channels are available, the offset is calculated from a
channel and lun id into a linear array. As it multiplies with
the total number of luns, we go out of bound when channel id > 0 and
causes the kernel to panic when we read a protected kernel memory area.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/lightnvm')
| -rw-r--r-- | drivers/lightnvm/gennvm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c index f434e89e1c7a..a54b339951a3 100644 --- a/drivers/lightnvm/gennvm.c +++ b/drivers/lightnvm/gennvm.c @@ -75,7 +75,7 @@ static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks, struct nvm_block *blk; int i; - lun = &gn->luns[(dev->nr_luns * ppa.g.ch) + ppa.g.lun]; + lun = &gn->luns[(dev->luns_per_chnl * ppa.g.ch) + ppa.g.lun]; for (i = 0; i < nr_blocks; i++) { if (blks[i] == 0) |
