diff options
| -rw-r--r-- | kernel/sys.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 00a96746e28a..a3f4ef0bbda3 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -2007,11 +2007,14 @@ static int prctl_set_mm_map(int opt, const void __user *addr, unsigned long data if (prctl_map.exe_fd != (u32)-1) { /* - * Make sure the caller has the rights to - * change /proc/pid/exe link: only local sys admin should - * be allowed to. + * Check if the current user is checkpoint/restore capable. + * At the time of this writing, it checks for CAP_SYS_ADMIN + * or CAP_CHECKPOINT_RESTORE. + * Note that a user with access to ptrace can masquerade an + * arbitrary program as any executable, even setuid ones. + * This may have implications in the tomoyo subsystem. */ - if (!ns_capable(current_user_ns(), CAP_SYS_ADMIN)) + if (!checkpoint_restore_ns_capable(current_user_ns())) return -EINVAL; error = prctl_set_mm_exe_file(mm, prctl_map.exe_fd); |