diff options
| author | Al Viro <viro@ZenIV.linux.org.uk> | 2008-01-02 14:09:57 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-01-02 13:13:27 -0800 |
| commit | 831830b5a2b5d413407adf380ef62fe17d6fcbf2 (patch) | |
| tree | b08f54f15374b5b98b0b3bea20a1d2ea8d1f50e0 /include/linux | |
| parent | ac40532ef0b8649e6f7f83859ea0de1c4ed08a19 (diff) | |
| download | blackbird-op-linux-831830b5a2b5d413407adf380ef62fe17d6fcbf2.tar.gz blackbird-op-linux-831830b5a2b5d413407adf380ef62fe17d6fcbf2.zip | |
restrict reading from /proc/<pid>/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 <viro@zeniv.linux.org.uk>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ptrace.h | 1 |
1 files changed, 1 insertions, 0 deletions
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) |
