diff options
Diffstat (limited to 'fs/proc/task_mmu.c')
-rw-r--r-- | fs/proc/task_mmu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 956b75d61809..6dee68d013ff 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c | |||
@@ -1325,6 +1325,9 @@ out: | |||
1325 | 1325 | ||
1326 | static int pagemap_open(struct inode *inode, struct file *file) | 1326 | static int pagemap_open(struct inode *inode, struct file *file) |
1327 | { | 1327 | { |
1328 | /* do not disclose physical addresses: attack vector */ | ||
1329 | if (!capable(CAP_SYS_ADMIN)) | ||
1330 | return -EPERM; | ||
1328 | pr_warn_once("Bits 55-60 of /proc/PID/pagemap entries are about " | 1331 | pr_warn_once("Bits 55-60 of /proc/PID/pagemap entries are about " |
1329 | "to stop being page-shift some time soon. See the " | 1332 | "to stop being page-shift some time soon. See the " |
1330 | "linux/Documentation/vm/pagemap.txt for details.\n"); | 1333 | "linux/Documentation/vm/pagemap.txt for details.\n"); |