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| author | Philipp Stanner <pstanner@redhat.com> | 2023-11-02 20:13:09 +0100 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2023-11-13 10:21:33 +0200 |
| commit | c170d4ff21a8a525d782e3d1bc58d9538d95afe6 (patch) | |
| tree | 306432a287d74b2d41ed82a4df6a6ae3c6e7d274 | |
| parent | 476b7c7e00ec3d909bacaeaf1dc53eb2b2d0c41d (diff) | |
| download | linux-c170d4ff21a8a525d782e3d1bc58d9538d95afe6.tar.gz linux-c170d4ff21a8a525d782e3d1bc58d9538d95afe6.tar.bz2 linux-c170d4ff21a8a525d782e3d1bc58d9538d95afe6.zip | |
RDMA/hfi1: Copy userspace arrays safely
Currently, memdup_user() is utilized at two positions to copy userspace
arrays. This is done without overflow checks.
Use the new wrapper memdup_array_user() to copy the arrays more safely.
Suggested-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Philipp Stanner <pstanner@redhat.com>
Link: https://lore.kernel.org/r/20231102191308.52046-2-pstanner@redhat.com
Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
| -rw-r--r-- | drivers/infiniband/hw/hfi1/user_exp_rcv.c | 4 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/user_sdma.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c index 6419872f95cf..cf2d29098406 100644 --- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c +++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c @@ -491,8 +491,8 @@ int hfi1_user_exp_rcv_clear(struct hfi1_filedata *fd, if (unlikely(tinfo->tidcnt > fd->tid_used)) return -EINVAL; - tidinfo = memdup_user(u64_to_user_ptr(tinfo->tidlist), - sizeof(tidinfo[0]) * tinfo->tidcnt); + tidinfo = memdup_array_user(u64_to_user_ptr(tinfo->tidlist), + tinfo->tidcnt, sizeof(tidinfo[0])); if (IS_ERR(tidinfo)) return PTR_ERR(tidinfo); diff --git a/drivers/infiniband/hw/hfi1/user_sdma.c b/drivers/infiniband/hw/hfi1/user_sdma.c index 6a4aa59c0cbc..b72625283fcf 100644 --- a/drivers/infiniband/hw/hfi1/user_sdma.c +++ b/drivers/infiniband/hw/hfi1/user_sdma.c @@ -494,8 +494,8 @@ int hfi1_user_sdma_process_request(struct hfi1_filedata *fd, * equal to the pkt count. However, there is no way to * tell at this point. */ - tmp = memdup_user(iovec[idx].iov_base, - ntids * sizeof(*req->tids)); + tmp = memdup_array_user(iovec[idx].iov_base, + ntids, sizeof(*req->tids)); if (IS_ERR(tmp)) { ret = PTR_ERR(tmp); SDMA_DBG(req, "Failed to copy %d TIDs (%d)", |