From 2fadaef41283aad7100fa73f01998cddaca25833 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 15 Feb 2011 22:52:11 -0500 Subject: [PATCH] auxv: require the target to be tracable (or yourself) same as for environ, except that we didn't do any checks to prevent access after suid execve Signed-off-by: Al Viro --- fs/proc/base.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index fc471b8766d1..e94b58b496f1 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -281,9 +281,9 @@ static int proc_pid_cmdline(struct task_struct *task, char * buffer) static int proc_pid_auxv(struct task_struct *task, char *buffer) { - int res = 0; - struct mm_struct *mm = get_task_mm(task); - if (mm) { + struct mm_struct *mm = mm_for_maps(task); + int res = PTR_ERR(mm); + if (mm && !IS_ERR(mm)) { unsigned int nwords = 0; do { nwords += 2;