vfio: Fix NULL pointer dereference caused by uninitialized group->iommufd
group->iommufd is not initialized for the iommufd_ctx_put()
[20018.331541] BUG: kernel NULL pointer dereference, address: 0000000000000000
[20018.377508] RIP: 0010:iommufd_ctx_put+0x5/0x10 [iommufd]
...
[20018.476483] Call Trace:
[20018.479214] <TASK>
[20018.481555] vfio_group_fops_unl_ioctl+0x506/0x690 [vfio]
[20018.487586] __x64_sys_ioctl+0x6a/0xb0
[20018.491773] ? trace_hardirqs_on+0xc5/0xe0
[20018.496347] do_syscall_64+0x67/0x90
[20018.500340] entry_SYSCALL_64_after_hwframe+0x4b/0xb5
Fixes: 9eefba8002c2 ("vfio: Move vfio group specific code into group.c")
Cc: stable@vger.kernel.org
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230222074938.13681-1-yan.y.zhao@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
1 file changed
