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authorIngo Molnar <[email protected]>2015-07-31 10:23:35 +0200
committerIngo Molnar <[email protected]>2015-07-31 10:23:35 +0200
commit5b929bd11df23922daf1be5d52731cc3900c1d79 (patch)
tree105fa5987b03c9f4e0260a9eb04dff7bb3d16839 /drivers/misc/cxl/context.c
parentb2c51106c7581866c37ffc77c5d739f3d4b7cbc9 (diff)
parent37868fe113ff2ba814b3b4eb12df214df555f8dc (diff)
Merge branch 'x86/urgent' into x86/asm, before applying dependent patches
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'drivers/misc/cxl/context.c')
-rw-r--r--drivers/misc/cxl/context.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index 2a4c80ac322a..1287148629c0 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -113,11 +113,11 @@ static int cxl_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
if (ctx->afu->current_mode == CXL_MODE_DEDICATED) {
area = ctx->afu->psn_phys;
- if (offset > ctx->afu->adapter->ps_size)
+ if (offset >= ctx->afu->adapter->ps_size)
return VM_FAULT_SIGBUS;
} else {
area = ctx->psn_phys;
- if (offset > ctx->psn_size)
+ if (offset >= ctx->psn_size)
return VM_FAULT_SIGBUS;
}
@@ -145,8 +145,16 @@ static const struct vm_operations_struct cxl_mmap_vmops = {
*/
int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma)
{
+ u64 start = vma->vm_pgoff << PAGE_SHIFT;
u64 len = vma->vm_end - vma->vm_start;
- len = min(len, ctx->psn_size);
+
+ if (ctx->afu->current_mode == CXL_MODE_DEDICATED) {
+ if (start + len > ctx->afu->adapter->ps_size)
+ return -EINVAL;
+ } else {
+ if (start + len > ctx->psn_size)
+ return -EINVAL;
+ }
if (ctx->afu->current_mode != CXL_MODE_DEDICATED) {
/* make sure there is a valid per process space for this AFU */