4 files changed, 10 insertions, 3 deletions

diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c
index f95ae9789c91..f9c88d0c8ced 100644
--- a/fs/binfmt_em86.c
+++ b/fs/binfmt_em86.c
@@ -43,7 +43,7 @@ static int load_em86(struct linux_binprm *bprm,struct pt_regs *regs)
                         return -ENOEXEC;
         }
 
-        bprm->sh_bang++;        /* Well, the bang-shell is implicit... */
+        bprm->sh_bang = 1;      /* Well, the bang-shell is implicit... */
         allow_write_access(bprm->file);
         fput(bprm->file);
         bprm->file = NULL;
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index dbf0ac0523de..7191306367c5 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -115,6 +115,12 @@ static int load_misc_binary(struct linux_binprm *bprm, struct pt_regs *regs)
         if (!enabled)
                 goto _ret;
 
+        retval = -ENOEXEC;
+        if (bprm->misc_bang)
+                goto _ret;
+
+        bprm->misc_bang = 1;
+
         /* to keep locking time low, we copy the interpreter string */
         read_lock(&entries_lock);
         fmt = check_file(bprm);
diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c
index ab33939b12a7..9e3963f7ebf1 100644
--- a/fs/binfmt_script.c
+++ b/fs/binfmt_script.c
@@ -29,7 +29,7 @@ static int load_script(struct linux_binprm *bprm,struct pt_regs *regs)
          * Sorta complicated, but hopefully it will work.  -TYT
          */
 
-        bprm->sh_bang++;
+        bprm->sh_bang = 1;
         allow_write_access(bprm->file);
         fput(bprm->file);
         bprm->file = NULL;
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 1dd756731c95..b512e48f6d8e 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -34,7 +34,8 @@ struct linux_binprm{
 #endif
         struct mm_struct *mm;
         unsigned long p; /* current top of mem */
-        int sh_bang;
+        unsigned int sh_bang:1,
+                     misc_bang:1;
         struct file * file;
         int e_uid, e_gid;
         kernel_cap_t cap_inheritable, cap_permitted;