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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-19 15:32:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-19 15:32:38 +0200 |
| commit | 70139ad9eba06eec22aa4a03d6198dce7b1d7963 (patch) | |
| tree | 869cb46a94bfae79f97cf941297b37f0652e6869 /arch/powerpc/platforms/powernv/memtrace.c | |
| parent | 0cb30e3f5e2fdff1c4271330db21cec387d3d85c (diff) | |
| parent | 23fdf46589db718d538fa3e65ab0d57362d50b4a (diff) | |
Merge v6.12.34linux-rolling-lts
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/platforms/powernv/memtrace.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/memtrace.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c index 877720c64515..35471b679638 100644 --- a/arch/powerpc/platforms/powernv/memtrace.c +++ b/arch/powerpc/platforms/powernv/memtrace.c @@ -48,11 +48,15 @@ static ssize_t memtrace_read(struct file *filp, char __user *ubuf, static int memtrace_mmap(struct file *filp, struct vm_area_struct *vma) { struct memtrace_entry *ent = filp->private_data; + unsigned long ent_nrpages = ent->size >> PAGE_SHIFT; + unsigned long vma_nrpages = vma_pages(vma); - if (ent->size < vma->vm_end - vma->vm_start) + /* The requested page offset should be within object's page count */ + if (vma->vm_pgoff >= ent_nrpages) return -EINVAL; - if (vma->vm_pgoff << PAGE_SHIFT >= ent->size) + /* The requested mapping range should remain within the bounds */ + if (vma_nrpages > ent_nrpages - vma->vm_pgoff) return -EINVAL; vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |