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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-08-30 16:06:38 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-08-30 16:06:38 -0700 |
| commit | 1ac731c529cd4d6adbce134754b51ff7d822b145 (patch) | |
| tree | 143ab3f35ca5f3b69f583c84e6964b17139c2ec1 /fs/proc/task_mmu.c | |
| parent | 07b4c950f27bef0362dc6ad7ee713aab61d58149 (diff) | |
| parent | 54116d442e001e1b6bd482122043b1870998a1f3 (diff) | |
Merge branch 'next' into for-linus
Prepare input updates for 6.6 merge window.
Diffstat (limited to 'fs/proc/task_mmu.c')
| -rw-r--r-- | fs/proc/task_mmu.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 6a96e1713fd5..420510f6a545 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -782,7 +782,6 @@ static void smap_gather_stats(struct vm_area_struct *vma, if (start >= vma->vm_end) return; -#ifdef CONFIG_SHMEM if (vma->vm_file && shmem_mapping(vma->vm_file->f_mapping)) { /* * For shared or readonly shmem mappings we know that all @@ -803,7 +802,7 @@ static void smap_gather_stats(struct vm_area_struct *vma, ops = &smaps_shmem_walk_ops; } } -#endif + /* mmap_lock is held in m_start */ if (!start) walk_page_vma(vma, ops, mss); @@ -1689,8 +1688,13 @@ static ssize_t pagemap_read(struct file *file, char __user *buf, /* watch out for wraparound */ start_vaddr = end_vaddr; - if (svpfn <= (ULONG_MAX >> PAGE_SHIFT)) - start_vaddr = untagged_addr(svpfn << PAGE_SHIFT); + if (svpfn <= (ULONG_MAX >> PAGE_SHIFT)) { + ret = mmap_read_lock_killable(mm); + if (ret) + goto out_free; + start_vaddr = untagged_addr_remote(mm, svpfn << PAGE_SHIFT); + mmap_read_unlock(mm); + } /* Ensure the address is inside the task */ if (start_vaddr > mm->task_size) |