From 26500475ac1b499d8636ff281311d633909f5d20 Mon Sep 17 00:00:00 2001 From: Tycho Andersen Date: Wed, 11 Oct 2017 09:39:21 -0600 Subject: ptrace, seccomp: add support for retrieving seccomp metadata With the new SECCOMP_FILTER_FLAG_LOG, we need to be able to extract these flags for checkpoint restore, since they describe the state of a filter. So, let's add PTRACE_SECCOMP_GET_METADATA, similar to ..._GET_FILTER, which returns the metadata of the nth filter (right now, just the flags). Hopefully this will be future proof, and new per-filter metadata can be added to this struct. Signed-off-by: Tycho Andersen CC: Kees Cook CC: Andy Lutomirski CC: Oleg Nesterov Signed-off-by: Kees Cook --- include/linux/seccomp.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux') diff --git a/include/linux/seccomp.h b/include/linux/seccomp.h index 10f25f7e4304..c723a5c4e3ff 100644 --- a/include/linux/seccomp.h +++ b/include/linux/seccomp.h @@ -95,11 +95,19 @@ static inline void get_seccomp_filter(struct task_struct *tsk) #if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE) extern long seccomp_get_filter(struct task_struct *task, unsigned long filter_off, void __user *data); +extern long seccomp_get_metadata(struct task_struct *task, + unsigned long filter_off, void __user *data); #else static inline long seccomp_get_filter(struct task_struct *task, unsigned long n, void __user *data) { return -EINVAL; } +static inline long seccomp_get_metadata(struct task_struct *task, + unsigned long filter_off, + void __user *data) +{ + return -EINVAL; +} #endif /* CONFIG_SECCOMP_FILTER && CONFIG_CHECKPOINT_RESTORE */ #endif /* _LINUX_SECCOMP_H */ -- cgit v1.2.3