f88a7dd06a
This patch adds a NULL check to fix this crash reported during the freeing of root PT entry: BUG: unable to handle page fault for address: ffffc9002d637aa0 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page RIP: 0010:amdgpu_vm_pt_free+0x66/0xe0 [amdgpu] PKRU: 55555554 Call Trace: <TASK> amdgpu_vm_pt_free_root+0x60/0xa0 [amdgpu] amdgpu_vm_fini+0x2cb/0x5d0 [amdgpu] ? amdgpu_ctx_mgr_entity_fini+0x53/0x1c0 [amdgpu] amdgpu_driver_postclose_kms+0x191/0x2d0 [amdgpu] drm_file_free.part.0+0x1e5/0x260 [drm] Cc: Christian König <Christian.Koenig@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Felix Kuehling <felix.kuehling@amd.com> Cc: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com> Acked-by: Christian König <Christian.Koenig@amd.com> Signed-off-by: Shashank Sharma <shashank.sharma@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.