diff options
| author | Dennis Dalessandro <dennis.dalessandro@intel.com> | 2016-05-19 05:26:44 -0700 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-05-26 11:35:13 -0400 |
| commit | e11ffbd57520c3832e05f2f5f19e9ff6adbb7cdc (patch) | |
| tree | 6926bb60c32447ffc09e68e909492d85c0044c38 /mm/huge_memory.c | |
| parent | 8a1882ebd4b593df0e36ba0b72e4e2f632573274 (diff) | |
IB/hfi1: Do not free hfi1 cdev parent structure early
The deletion of a cdev is not a fence for holding off references to the
structure. The driver attempts to delete the cdev and then proceeds to
free the parent structure, the hfi1_devdata, or dd. This can potentially
lead to a kernel panic in situations where a user has an FD for the cdev
open, and the pci device gets removed. If the user then closes the FD
there will be a NULL dereference when trying to do put on the cdev's
kobject.
Fix this by pointing the cdev's kobject.parent at a new kobject embedded
in its parent structure. Also take a reference when the device is opened
and put it back when it is closed.
Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'mm/huge_memory.c')
0 files changed, 0 insertions, 0 deletions