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Diffstat (limited to 'include/linux/binfmts.h')
-rw-r--r--include/linux/binfmts.h19
1 files changed, 14 insertions, 5 deletions
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index e1a708337be3..91c8c07fe8b7 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -6,11 +6,13 @@
struct pt_regs;
/*
- * MAX_ARG_PAGES defines the number of pages allocated for arguments
- * and envelope for the new program. 32 should suffice, this gives
- * a maximum env+arg of 128kB w/4KB pages!
+ * These are the maximum length and maximum number of strings passed to the
+ * execve() system call. MAX_ARG_STRLEN is essentially random but serves to
+ * prevent the kernel from being unduly impacted by misaddressed pointers.
+ * MAX_ARG_STRINGS is chosen to fit in a signed 32-bit integer.
*/
-#define MAX_ARG_PAGES 32
+#define MAX_ARG_STRLEN (PAGE_SIZE * 32)
+#define MAX_ARG_STRINGS 0x7FFFFFFF
/* sizeof(linux_binprm->buf) */
#define BINPRM_BUF_SIZE 128
@@ -24,7 +26,12 @@ struct pt_regs;
*/
struct linux_binprm{
char buf[BINPRM_BUF_SIZE];
+#ifdef CONFIG_MMU
+ struct vm_area_struct *vma;
+#else
+# define MAX_ARG_PAGES 32
struct page *page[MAX_ARG_PAGES];
+#endif
struct mm_struct *mm;
unsigned long p; /* current top of mem */
int sh_bang;
@@ -40,6 +47,7 @@ struct linux_binprm{
unsigned interp_flags;
unsigned interp_data;
unsigned long loader, exec;
+ unsigned long argv_len;
};
#define BINPRM_FLAGS_ENFORCE_NONDUMP_BIT 0
@@ -68,7 +76,7 @@ extern int register_binfmt(struct linux_binfmt *);
extern int unregister_binfmt(struct linux_binfmt *);
extern int prepare_binprm(struct linux_binprm *);
-extern void remove_arg_zero(struct linux_binprm *);
+extern int __must_check remove_arg_zero(struct linux_binprm *);
extern int search_binary_handler(struct linux_binprm *,struct pt_regs *);
extern int flush_old_exec(struct linux_binprm * bprm);
@@ -85,6 +93,7 @@ extern int suid_dumpable;
extern int setup_arg_pages(struct linux_binprm * bprm,
unsigned long stack_top,
int executable_stack);
+extern int bprm_mm_init(struct linux_binprm *bprm);
extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
extern void compute_creds(struct linux_binprm *binprm);
extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);