[PATCH] binfmt_flat mmap flag fix

Make sure that binfmt_flat passes the correct flags into do_mmap().  nommu's
validate_mmap_request() will simple return -EINVAL if we try and pass it a
flags value of zero.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index f0cd67d..c8998dc 100644 (file)
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -520,7 +520,7 @@ static int load_flat_file(struct linux_binprm * bprm,
                DBG_FLT("BINFMT_FLAT: ROM mapping of file (we hope)\n");
 
                down_write(&current->mm->mmap_sem);
-               textpos = do_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC, 0, 0);
+               textpos = do_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC, MAP_SHARED, 0);
                up_write(&current->mm->mmap_sem);
                if (!textpos  || textpos >= (unsigned long) -4096) {
                        if (!textpos)
@@ -532,7 +532,7 @@ static int load_flat_file(struct linux_binprm * bprm,
                down_write(&current->mm->mmap_sem);
                realdatastart = do_mmap(0, 0, data_len + extra +
                                MAX_SHARED_LIBS * sizeof(unsigned long),
-                               PROT_READ|PROT_WRITE|PROT_EXEC, 0, 0);
+                               PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 0);
                up_write(&current->mm->mmap_sem);
 
                if (realdatastart == 0 || realdatastart >= (unsigned long)-4096) {
@@ -574,7 +574,7 @@ static int load_flat_file(struct linux_binprm * bprm,
                down_write(&current->mm->mmap_sem);
                textpos = do_mmap(0, 0, text_len + data_len + extra +
                                        MAX_SHARED_LIBS * sizeof(unsigned long),
-                               PROT_READ | PROT_EXEC | PROT_WRITE, 0, 0);
+                               PROT_READ | PROT_EXEC | PROT_WRITE, MAP_PRIVATE, 0);
                up_write(&current->mm->mmap_sem);
                if (!textpos  || textpos >= (unsigned long) -4096) {
                        if (!textpos)