diff options
| author | Sagi Grimberg <sagi@grimberg.me> | 2018-07-11 16:13:04 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-07-24 15:55:51 +0200 |
| commit | 9c891c139894ce2ec0ca585a00e0bec5e6b4ccab (patch) | |
| tree | 21169eb86749df520103c101737a63b4bddebd62 /drivers | |
| parent | 1b72b71faccee986e2128a271125177dfe91f7b7 (diff) | |
| download | linux-9c891c139894ce2ec0ca585a00e0bec5e6b4ccab.tar.bz2 | |
nvmet: check fileio lba range access boundaries
Fail out-of-bounds with a proper status code.
Fixes: d5eff33ee6f8 ("nvmet: add simple file backed ns support")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/target/io-cmd-file.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/nvme/target/io-cmd-file.c b/drivers/nvme/target/io-cmd-file.c index dad8d44bf90e..c2d0d08b59c8 100644 --- a/drivers/nvme/target/io-cmd-file.c +++ b/drivers/nvme/target/io-cmd-file.c @@ -145,6 +145,12 @@ static void nvmet_file_execute_rw(struct nvmet_req *req) return; } + pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; + if (unlikely(pos + req->data_len > req->ns->size)) { + nvmet_req_complete(req, NVME_SC_LBA_RANGE | NVME_SC_DNR); + return; + } + if (nr_bvec > NVMET_MAX_INLINE_BIOVEC) req->f.bvec = kmalloc_array(nr_bvec, sizeof(struct bio_vec), GFP_KERNEL); @@ -160,8 +166,6 @@ static void nvmet_file_execute_rw(struct nvmet_req *req) is_sync = true; } - pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; - memset(&req->f.iocb, 0, sizeof(struct kiocb)); for_each_sg_page(req->sg, &sg_pg_iter, req->sg_cnt, 0) { nvmet_file_init_bvec(&req->f.bvec[bv_cnt], &sg_pg_iter); @@ -236,8 +240,14 @@ static void nvmet_file_execute_discard(struct nvmet_req *req) sizeof(range)); if (ret) break; + offset = le64_to_cpu(range.slba) << req->ns->blksize_shift; len = le32_to_cpu(range.nlb) << req->ns->blksize_shift; + if (offset + len > req->ns->size) { + ret = NVME_SC_LBA_RANGE | NVME_SC_DNR; + break; + } + if (vfs_fallocate(req->ns->file, mode, offset, len)) { ret = NVME_SC_INTERNAL | NVME_SC_DNR; break; @@ -283,6 +293,11 @@ static void nvmet_file_write_zeroes_work(struct work_struct *w) len = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) << req->ns->blksize_shift); + if (unlikely(offset + len > req->ns->size)) { + nvmet_req_complete(req, NVME_SC_LBA_RANGE | NVME_SC_DNR); + return; + } + ret = vfs_fallocate(req->ns->file, mode, offset, len); nvmet_req_complete(req, ret < 0 ? NVME_SC_INTERNAL | NVME_SC_DNR : 0); } |