From 831830b5a2b5d413407adf380ef62fe17d6fcbf2 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 2 Jan 2008 14:09:57 +0000 Subject: restrict reading from /proc//maps to those who share ->mm or can ptrace pid Contents of /proc/*/maps is sensitive and may become sensitive after open() (e.g. if target originally shares our ->mm and later does exec on suid-root binary). Check at read() (actually, ->start() of iterator) time that mm_struct we'd grabbed and locked is - still the ->mm of target - equal to reader's ->mm or the target is ptracable by reader. Signed-off-by: Al Viro Acked-by: Rik van Riel Signed-off-by: Linus Torvalds --- include/linux/ptrace.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h index ae8146abd746..3ea5750a0f7e 100644 --- a/include/linux/ptrace.h +++ b/include/linux/ptrace.h @@ -97,6 +97,7 @@ extern void __ptrace_link(struct task_struct *child, extern void __ptrace_unlink(struct task_struct *child); extern void ptrace_untrace(struct task_struct *child); extern int ptrace_may_attach(struct task_struct *task); +extern int __ptrace_may_attach(struct task_struct *task); static inline void ptrace_link(struct task_struct *child, struct task_struct *new_parent) -- cgit v1.2.2