mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-16 09:02:21 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/xe/xe_pagefault: Disallow writes to read-only VMAs

Browse Source 
The page fault handler should reject write/atomic access to read only
VMAs.  Add code to handle this in xe_pagefault_service after the VMA
lookup.

v2:
- Apply max line length (Matthew)

Fixes: fb544b8445 ("drm/xe: Implement xe_pagefault_queue_work")
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Cc: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260324152935.72444-7-jonathan.cavitt@intel.com
This commit is contained in:
Jonathan Cavitt
2026-03-24 15:29:37 +00:00
committed by Matthew Brost
parent aec6969f75
commit 714ee6754a
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/xe/xe_pagefault.c
View File

@@ -187,6 +187,12 @@ static int xe_pagefault_service(struct xe_pagefault *pf)
goto unlock_vm;
}
if (xe_vma_read_only(vma) &&
pf->consumer.access_type != XE_PAGEFAULT_ACCESS_TYPE_READ) {
err = -EPERM;
goto unlock_vm;
}
atomic = xe_pagefault_access_is_atomic(pf->consumer.access_type);
if (xe_vma_is_cpu_addr_mirror(vma))