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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 10:19:01 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 10:19:01 +0200 |
| commit | 9749c37275cb1f72d309e676642f45eb92724190 (patch) | |
| tree | 7ecfdc655eebb56ddfee430f7f05e641ec4b49bb /mm/migrate.c | |
| parent | 4f9adc8f91ba996374cd9487ecd1180fa99b9438 (diff) | |
| parent | cc4a41fe5541a73019a864883297bd5043aa6d98 (diff) | |
| download | linux-9749c37275cb1f72d309e676642f45eb92724190.tar.bz2 | |
Merge 4.13-rc7 into char-misc-next
We want the binder fix in here as well for testing and merge issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index d68a41da6abb..e84eeb4e4356 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -41,6 +41,7 @@ #include <linux/page_idle.h> #include <linux/page_owner.h> #include <linux/sched/mm.h> +#include <linux/ptrace.h> #include <asm/tlbflush.h> @@ -1652,7 +1653,6 @@ SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages, const int __user *, nodes, int __user *, status, int, flags) { - const struct cred *cred = current_cred(), *tcred; struct task_struct *task; struct mm_struct *mm; int err; @@ -1676,14 +1676,9 @@ SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages, /* * Check if this process has the right to modify the specified - * process. The right exists if the process has administrative - * capabilities, superuser privileges or the same - * userid as the target process. + * process. Use the regular "ptrace_may_access()" checks. */ - tcred = __task_cred(task); - if (!uid_eq(cred->euid, tcred->suid) && !uid_eq(cred->euid, tcred->uid) && - !uid_eq(cred->uid, tcred->suid) && !uid_eq(cred->uid, tcred->uid) && - !capable(CAP_SYS_NICE)) { + if (!ptrace_may_access(task, PTRACE_MODE_READ_REALCREDS)) { rcu_read_unlock(); err = -EPERM; goto out; |