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| author | Prasad J Pandit | 2018-12-12 20:30:36 +0100 |
|---|---|---|
| committer | Marcel Apfelbaum | 2018-12-22 10:09:57 +0100 |
| commit | 2c858ce5da8ae6689c75182b73bc455a291cad41 (patch) | |
| tree | 102b7040178f73c37b568f19c2076d4d189ad4e8 /hw/rdma/vmw | |
| parent | pvrdma: add uar_read routine (diff) | |
| download | qemu-2c858ce5da8ae6689c75182b73bc455a291cad41.tar.gz qemu-2c858ce5da8ae6689c75182b73bc455a291cad41.tar.xz qemu-2c858ce5da8ae6689c75182b73bc455a291cad41.zip | |
pvrdma: check number of pages when creating rings
When creating CQ/QP rings, an object can have up to
PVRDMA_MAX_FAST_REG_PAGES 8 pages. Check 'npages' parameter
to avoid excessive memory allocation or a null dereference.
Reported-by: Li Qiang <liq3ea@163.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Diffstat (limited to 'hw/rdma/vmw')
| -rw-r--r-- | hw/rdma/vmw/pvrdma_cmd.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/hw/rdma/vmw/pvrdma_cmd.c b/hw/rdma/vmw/pvrdma_cmd.c index 3b94545761..f236ac4795 100644 --- a/hw/rdma/vmw/pvrdma_cmd.c +++ b/hw/rdma/vmw/pvrdma_cmd.c @@ -259,6 +259,11 @@ static int create_cq_ring(PCIDevice *pci_dev , PvrdmaRing **ring, int rc = -EINVAL; char ring_name[MAX_RING_NAME_SZ]; + if (!nchunks || nchunks > PVRDMA_MAX_FAST_REG_PAGES) { + pr_dbg("invalid nchunks: %d\n", nchunks); + return rc; + } + pr_dbg("pdir_dma=0x%llx\n", (long long unsigned int)pdir_dma); dir = rdma_pci_dma_map(pci_dev, pdir_dma, TARGET_PAGE_SIZE); if (!dir) { @@ -372,6 +377,12 @@ static int create_qp_rings(PCIDevice *pci_dev, uint64_t pdir_dma, char ring_name[MAX_RING_NAME_SZ]; uint32_t wqe_sz; + if (!spages || spages > PVRDMA_MAX_FAST_REG_PAGES + || !rpages || rpages > PVRDMA_MAX_FAST_REG_PAGES) { + pr_dbg("invalid pages: %d, %d\n", spages, rpages); + return rc; + } + pr_dbg("pdir_dma=0x%llx\n", (long long unsigned int)pdir_dma); dir = rdma_pci_dma_map(pci_dev, pdir_dma, TARGET_PAGE_SIZE); if (!dir) { |