diff options
| author | Lv Yunlong <[email protected]> | 2021-04-26 07:06:14 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <[email protected]> | 2021-04-27 15:22:29 -0300 |
| commit | 34b39efa5ae82fc0ad0acc27653c12a56328dbbe (patch) | |
| tree | a820f438285564302f2905d592049195d9be8513 | |
| parent | 3093ee182f01689b89e9f8797b321603e5de4f63 (diff) | |
RDMA/bnxt_re: Fix a double free in bnxt_qplib_alloc_res
In bnxt_qplib_alloc_res, it calls bnxt_qplib_alloc_dpi_tbl(). Inside
bnxt_qplib_alloc_dpi_tbl, dpit->dbr_bar_reg_iomem is freed via
pci_iounmap() in unmap_io error branch. After the callee returns err code,
bnxt_qplib_alloc_res calls
bnxt_qplib_free_res()->bnxt_qplib_free_dpi_tbl() in the fail branch. Then
dpit->dbr_bar_reg_iomem is freed in the second time by pci_iounmap().
My patch set dpit->dbr_bar_reg_iomem to NULL after it is freed by
pci_iounmap() in the first time, to avoid the double free.
Fixes: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lv Yunlong <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Acked-by: Devesh Sharma <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>
| -rw-r--r-- | drivers/infiniband/hw/bnxt_re/qplib_res.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c index fa7878336100..3ca47004b752 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_res.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c @@ -854,6 +854,7 @@ static int bnxt_qplib_alloc_dpi_tbl(struct bnxt_qplib_res *res, unmap_io: pci_iounmap(res->pdev, dpit->dbr_bar_reg_iomem); + dpit->dbr_bar_reg_iomem = NULL; return -ENOMEM; } |