From 2d66e6a23822a500ecf6610411941e99127129c8 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Thu, 28 May 2015 01:43:47 -0500 Subject: Attempt to fix the mkdir LSM race. Doing a world writeable mkdir and _then_ adding a label seems like a race window, so set the global "create stuff with these labels" context, then do the creates. --- lib/lsm.h | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'lib/lsm.h') diff --git a/lib/lsm.h b/lib/lsm.h index 660917aa..d7e7de9c 100644 --- a/lib/lsm.h +++ b/lib/lsm.h @@ -7,6 +7,7 @@ #include #else #define is_selinux_enabled() 0 +#define setfscreatecon(...) (-1) #define getcon(...) (-1) #define getfilecon(...) (-1) #define lgetfilecon(...) (-1) @@ -27,6 +28,7 @@ #define smack_new_label_from_self(...) (-1) #define smack_new_label_from_path(...) (-1) #define smack_new_label_from_file(...) (-1) +#define smack_set_label_for_self(...) (-1) #define smack_set_label_for_path(...) (-1) #define smack_set_label_for_file(...) (-1) #endif @@ -58,6 +60,14 @@ static inline char *lsm_context(void) return ok ? result : strdup("?"); } +// Set default label to apply to newly created stuff (NULL to clear it) +static inline int lsm_set_create(char *context) +{ + if (CFG_TOYBOX_SMACK) return smack_set_label_for_self(context); + else return setfscreatecon(context); +} + +// Label a file, following symlinks static inline int lsm_set_context(char *filename, char *context) { if (CFG_TOYBOX_SMACK) @@ -65,6 +75,7 @@ static inline int lsm_set_context(char *filename, char *context) else return setfilecon(filename, context); } +// Label a file, don't follow symlinks static inline int lsm_lset_context(char *filename, char *context) { if (CFG_TOYBOX_SMACK) @@ -72,6 +83,7 @@ static inline int lsm_lset_context(char *filename, char *context) else return lsetfilecon(filename, context); } +// Label a file by filehandle static inline int lsm_fset_context(int file, char *context) { if (CFG_TOYBOX_SMACK) @@ -79,7 +91,6 @@ static inline int lsm_fset_context(int file, char *context) else return fsetfilecon(file, context); } - // returns -1 in case of error or else the length of the context */ // context can be NULL to get the length only */ static inline int lsm_get_context(char *filename, char **context) -- cgit v1.2.3