lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 23 Jan 2014 14:32:40 -0500 From: Richard Guy Briggs <rgb@...hat.com> To: linux-audit@...hat.com, linux-kernel@...r.kernel.org Cc: Richard Guy Briggs <rgb@...hat.com>, eparis@...hat.com, sgrubb@...hat.com, akpm@...ux-foundation.org, peterz@...radead.org, oleg@...hat.com, stable@...r.kernel.org, "Eric W. Biederman" <ebiederm@...ssion.com> Subject: [PATCH 7/7] pid: get pid_t ppid of task in init_pid_ns Added the functions task_ppid_nr_ns() and task_ppid_nr() to abstract the lookup of the PPID (real_parent's pid_t) of a process, including rcu locking, in the arbitrary and init_pid_ns. This provides an alternative to sys_getppid(), which is relative to the child process' pid namespace. (informed by ebiederman's 6c621b7e) Cc: stable@...r.kernel.org Cc: Eric W. Biederman <ebiederm@...ssion.com> Signed-off-by: Richard Guy Briggs <rgb@...hat.com> --- include/linux/sched.h | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index 2016d92..cba2486 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1561,6 +1561,24 @@ static inline pid_t task_tgid_vnr(const struct task_struct *tsk) } +static int pid_alive(const struct task_struct *p); +static inline pid_t task_ppid_nr_ns(const struct task_struct *tsk, struct pid_namespace *ns) +{ + pid_t pid = 0; + + rcu_read_lock(); + if (pid_alive(tsk)) + pid = task_tgid_nr_ns(rcu_dereference(tsk->real_parent), ns); + rcu_read_unlock(); + + return pid; +} + +static inline pid_t task_ppid_nr(const struct task_struct *tsk) +{ + return task_ppid_nr_ns(tsk, &init_pid_ns); +} + static inline pid_t task_pgrp_nr_ns(const struct task_struct *tsk, struct pid_namespace *ns) { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists