Fix ACC_MODE() for real

commit 5300990c0370e804e49d9a59d928c5d53fb73487 had stepped on a rather
nasty mess: definitions of ACC_MODE used to be different.  Fixed the
resulting breakage, converting them to variant that takes O_... value;
all callers have that and it actually simplifies life (see tomoyo part
of changes).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 3 insertions, 8 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 1b26b1620664..d930f1856ed2 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1620,7 +1620,7 @@ struct file *do_filp_open(int dfd, const char *pathname,
                 open_flag |= O_DSYNC;
 
         if (!acc_mode)
-                acc_mode = MAY_OPEN | ACC_MODE(flag);
+                acc_mode = MAY_OPEN | ACC_MODE(open_flag);
 
         /* O_TRUNC implies we need access checks for write permissions */
         if (flag & O_TRUNC)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9147ca88f253..b1bcb275b596 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2463,7 +2463,7 @@ int proc_nr_files(struct ctl_table *table, int write,
 
 int __init get_filesystem_list(char *buf);
 
-#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
+#define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
 #define OPEN_FMODE(flag) ((__force fmode_t)((flag + 1) & O_ACCMODE))
 
 #endif /* __KERNEL__ */
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
index 8a00ade85166..2aceebf5f354 100644
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
@@ -80,9 +80,8 @@ static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
                 return tomoyo_find_next_domain(bprm);
         /*
          * Read permission is checked against interpreters using next domain.
-         * '1' is the result of open_to_namei_flags(O_RDONLY).
          */
-        return tomoyo_check_open_permission(domain, &bprm->file->f_path, 1);
+        return tomoyo_check_open_permission(domain, &bprm->file->f_path, O_RDONLY);
 }
 
 static int tomoyo_path_truncate(struct path *path, loff_t length,
@@ -184,10 +183,6 @@ static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
 static int tomoyo_dentry_open(struct file *f, const struct cred *cred)
 {
         int flags = f->f_flags;
-
-        if ((flags + 1) & O_ACCMODE)
-                flags++;
-        flags |= f->f_flags & (O_APPEND | O_TRUNC);
         /* Don't check read permission here if called from do_execve(). */
         if (current->in_execve)
                 return 0;