binfmt_elf_fdpic: wire up AT_EXECFD, AT_EXECFN, AT_SECURE

These auxvec entries are the only ones left unhandled out of the current
base implementation. This syncs up binfmt_elf_fdpic with linux/auxvec.h
and current binfmt_elf.

Signed-off-by: Paul Mundt <[email protected]>
Acked-by: David Howells <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

fs/binfmt_elf_fdpic.c

@@ -25,6 +25,7 @@
 #include <linux/fcntl.h>
 #include <linux/slab.h>
 #include <linux/pagemap.h>
+#include <linux/security.h>
 #include <linux/highmem.h>
 #include <linux/highuid.h>
 #include <linux/personality.h>
@@ -560,11 +561,14 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
 	}
 
 	/* force 16 byte _final_ alignment here for generality */
-#define DLINFO_ITEMS 13
+#define DLINFO_ITEMS 15
 
 	nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) +
 		(k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH;
 
+	if (bprm->interp_flags & BINPRM_FLAGS_EXECFD)
+		nitems++;
+
 	csp = sp;
 	sp -= nitems * 2 * sizeof(unsigned long);
 	sp -= (bprm->envc + 1) * sizeof(char *);	/* envv[] */
@@ -602,6 +606,12 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
 			    (elf_addr_t) (unsigned long) u_base_platform);
 	}
 
+	if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) {
+		nr = 0;
+		csp -= 2 * sizeof(unsigned long);
+		NEW_AUX_ENT(AT_EXECFD, bprm->interp_data);
+	}
+
 	nr = 0;
 	csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long);
 	NEW_AUX_ENT(AT_HWCAP,	hwcap);
@@ -617,6 +627,8 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
 	NEW_AUX_ENT(AT_EUID,	(elf_addr_t) current->euid);
 	NEW_AUX_ENT(AT_GID,	(elf_addr_t) current->gid);
 	NEW_AUX_ENT(AT_EGID,	(elf_addr_t) current->egid);
+	NEW_AUX_ENT(AT_SECURE,	security_bprm_secureexec(bprm));
+	NEW_AUX_ENT(AT_EXECFN,	bprm->exec);
 
 #ifdef ARCH_DLINFO
 	nr = 0;