diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 69a1889f379..e8dcfc7de86 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -30,6 +30,7 @@ #include <linux/perf_event.h> #include <linux/audit.h> #include <linux/khugepaged.h> +#include <linux/uprobes.h> #include <asm/uaccess.h> #include <asm/cacheflush.h> @@ -546,8 +547,15 @@ again: remove_next = 1 + (end > next->vm_end); if (file) { mapping = file->f_mapping; - if (!(vma->vm_flags & VM_NONLINEAR)) + if (!(vma->vm_flags & VM_NONLINEAR)) { root = &mapping->i_mmap; + uprobe_munmap(vma, vma->vm_start, vma->vm_end); + + if (adjust_next) + uprobe_munmap(next, next->vm_start, + next->vm_end); + } + mutex_lock(&mapping->i_mmap_mutex); if (insert) { /* @@ -617,8 +625,16 @@ again: remove_next = 1 + (end > next->vm_end); if (mapping) mutex_unlock(&mapping->i_mmap_mutex); + if (root) { + uprobe_mmap(vma); + + if (adjust_next) + uprobe_mmap(next); + } + if (remove_next) { if (file) { + uprobe_munmap(next, next->vm_start, next->vm_end); fput(file); if (next->vm_flags & VM_EXECUTABLE) removed_exe_file_vma(mm); @@ -638,6 +654,8 @@ again: remove_next = 1 + (end > next->vm_end); goto again; } } + if (insert && file) + uprobe_mmap(insert); validate_mm(mm); @@ -1371,6 +1389,11 @@ out: mm->locked_vm += (len >> PAGE_SHIFT); } else if ((flags & MAP_POPULATE) && !(flags & MAP_NONBLOCK)) make_pages_present(addr, addr + len); + + if (file && uprobe_mmap(vma)) + /* matching probes but cannot insert */ + goto unmap_and_free_vma; + return addr; unmap_and_free_vma: @@ -2358,6 +2381,10 @@ int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma) if ((vma->vm_flags & VM_ACCOUNT) && security_vm_enough_memory_mm(mm, vma_pages(vma))) return -ENOMEM; + + if (vma->vm_file && uprobe_mmap(vma)) + return -EINVAL; + vma_link(mm, vma, prev, rb_link, rb_parent); return 0; } @@ -2427,6 +2454,10 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, new_vma->vm_pgoff = pgoff; if (new_vma->vm_file) { get_file(new_vma->vm_file); + + if (uprobe_mmap(new_vma)) + goto out_free_mempol; + if (vma->vm_flags & VM_EXECUTABLE) added_exe_file_vma(mm); } |