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-rw-r--r--mm/process_vm_access.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c
index 07514d41ebcc..be8dc8d1edb9 100644
--- a/mm/process_vm_access.c
+++ b/mm/process_vm_access.c
@@ -88,12 +88,16 @@ static int process_vm_rw_single_vec(unsigned long addr,
88 ssize_t rc = 0; 88 ssize_t rc = 0;
89 unsigned long max_pages_per_loop = PVM_MAX_KMALLOC_PAGES 89 unsigned long max_pages_per_loop = PVM_MAX_KMALLOC_PAGES
90 / sizeof(struct pages *); 90 / sizeof(struct pages *);
91 unsigned int flags = FOLL_REMOTE;
91 92
92 /* Work out address and page range required */ 93 /* Work out address and page range required */
93 if (len == 0) 94 if (len == 0)
94 return 0; 95 return 0;
95 nr_pages = (addr + len - 1) / PAGE_SIZE - addr / PAGE_SIZE + 1; 96 nr_pages = (addr + len - 1) / PAGE_SIZE - addr / PAGE_SIZE + 1;
96 97
98 if (vm_write)
99 flags |= FOLL_WRITE;
100
97 while (!rc && nr_pages && iov_iter_count(iter)) { 101 while (!rc && nr_pages && iov_iter_count(iter)) {
98 int pages = min(nr_pages, max_pages_per_loop); 102 int pages = min(nr_pages, max_pages_per_loop);
99 size_t bytes; 103 size_t bytes;
@@ -104,8 +108,7 @@ static int process_vm_rw_single_vec(unsigned long addr,
104 * current/current->mm 108 * current/current->mm
105 */ 109 */
106 pages = __get_user_pages_unlocked(task, mm, pa, pages, 110 pages = __get_user_pages_unlocked(task, mm, pa, pages,
107 vm_write, 0, process_pages, 111 process_pages, flags);
108 FOLL_REMOTE);
109 if (pages <= 0) 112 if (pages <= 0)
110 return -EFAULT; 113 return -EFAULT;
111 114