diff options
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 4530fc654455..167b535fe1a9 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -567,6 +567,7 @@ static int check_kill_permission(int sig, struct siginfo *info, struct task_struct *t) { struct pid *sid; + uid_t uid, euid; int error; if (!valid_signal(sig)) @@ -579,8 +580,10 @@ static int check_kill_permission(int sig, struct siginfo *info, if (error) return error; - if ((current->euid ^ t->suid) && (current->euid ^ t->uid) && - (current->uid ^ t->suid) && (current->uid ^ t->uid) && + uid = current_uid(); + euid = current_euid(); + if ((euid ^ t->suid) && (euid ^ t->uid) && + (uid ^ t->suid) && (uid ^ t->uid) && !capable(CAP_KILL)) { switch (sig) { case SIGCONT: @@ -844,7 +847,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t, q->info.si_errno = 0; q->info.si_code = SI_USER; q->info.si_pid = task_pid_vnr(current); - q->info.si_uid = current->uid; + q->info.si_uid = current_uid(); break; case (unsigned long) SEND_SIG_PRIV: q->info.si_signo = sig; @@ -1598,7 +1601,7 @@ void ptrace_notify(int exit_code) info.si_signo = SIGTRAP; info.si_code = exit_code; info.si_pid = task_pid_vnr(current); - info.si_uid = current->uid; + info.si_uid = current_uid(); /* Let the debugger run. */ spin_lock_irq(¤t->sighand->siglock); @@ -2211,7 +2214,7 @@ sys_kill(pid_t pid, int sig) info.si_errno = 0; info.si_code = SI_USER; info.si_pid = task_tgid_vnr(current); - info.si_uid = current->uid; + info.si_uid = current_uid(); return kill_something_info(sig, &info, pid); } @@ -2228,7 +2231,7 @@ static int do_tkill(pid_t tgid, pid_t pid, int sig) info.si_errno = 0; info.si_code = SI_TKILL; info.si_pid = task_tgid_vnr(current); - info.si_uid = current->uid; + info.si_uid = current_uid(); rcu_read_lock(); p = find_task_by_vpid(pid); |