diff options
| author | Sebastian Sanchez <sebastian.sanchez@intel.com> | 2018-05-01 05:35:58 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-09 09:50:22 +0200 |
| commit | 900ed3ec5634236a48e623ad3272ba59b0b1e842 (patch) | |
| tree | 30af38750344a11140dfbbc5f8ac46dfd24d907c | |
| parent | 7508e14f327f002093918800873e723337f0ceb7 (diff) | |
IB/hfi1: Fix NULL pointer dereference when invalid num_vls is used
commit 45d924571a5e1329580811f2419da61b07ac3613 upstream.
When an invalid num_vls is used as a module parameter, the code
execution follows an exception path where the macro dd_dev_err()
expects dd->pcidev->dev not to be NULL in hfi1_init_dd(). This
causes a NULL pointer dereference.
Fix hfi1_init_dd() by initializing dd->pcidev and dd->pcidev->dev
earlier in the code. If a dd exists, then dd->pcidev and
dd->pcidev->dev always exists.
BUG: unable to handle kernel NULL pointer dereference
at 00000000000000f0
IP: __dev_printk+0x15/0x90
Workqueue: events work_for_cpu_fn
RIP: 0010:__dev_printk+0x15/0x90
Call Trace:
dev_err+0x6c/0x90
? hfi1_init_pportdata+0x38d/0x3f0 [hfi1]
hfi1_init_dd+0xdd/0x2530 [hfi1]
? pci_conf1_read+0xb2/0xf0
? pci_read_config_word.part.9+0x64/0x80
? pci_conf1_write+0xb0/0xf0
? pcie_capability_clear_and_set_word+0x57/0x80
init_one+0x141/0x490 [hfi1]
local_pci_probe+0x3f/0xa0
work_for_cpu_fn+0x10/0x20
process_one_work+0x152/0x350
worker_thread+0x1cf/0x3e0
kthread+0xf5/0x130
? max_active_store+0x80/0x80
? kthread_bind+0x10/0x10
? do_syscall_64+0x6e/0x1a0
? SyS_exit_group+0x10/0x10
ret_from_fork+0x35/0x40
Cc: <stable@vger.kernel.org> # 4.9.x
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/infiniband/hw/hfi1/init.c | 2 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/pcie.c | 3 |
2 files changed, 2 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c index 84a97f3f9299..ae1f90ddd4e8 100644 --- a/drivers/infiniband/hw/hfi1/init.c +++ b/drivers/infiniband/hw/hfi1/init.c @@ -1049,6 +1049,8 @@ struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra) return ERR_PTR(-ENOMEM); dd->num_pports = nports; dd->pport = (struct hfi1_pportdata *)(dd + 1); + dd->pcidev = pdev; + pci_set_drvdata(pdev, dd); INIT_LIST_HEAD(&dd->list); idr_preload(GFP_KERNEL); diff --git a/drivers/infiniband/hw/hfi1/pcie.c b/drivers/infiniband/hw/hfi1/pcie.c index 335613a1a46a..717626046ee5 100644 --- a/drivers/infiniband/hw/hfi1/pcie.c +++ b/drivers/infiniband/hw/hfi1/pcie.c @@ -162,9 +162,6 @@ int hfi1_pcie_ddinit(struct hfi1_devdata *dd, struct pci_dev *pdev) unsigned long len; resource_size_t addr; - dd->pcidev = pdev; - pci_set_drvdata(pdev, dd); - addr = pci_resource_start(pdev, 0); len = pci_resource_len(pdev, 0); |