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file->f_op is never NULL...

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Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2013-09-22 16:27:52 -04:00
commit 72c2d53192
29 changed files with 74 additions and 97 deletions
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35
fs/exec.c
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@ -106,6 +106,7 @@ static inline void put_binfmt(struct linux_binfmt * fmt)
*/
SYSCALL_DEFINE1(uselib, const char __user *, library)
{
struct linux_binfmt *fmt;
struct file *file;
struct filename *tmp = getname(library);
int error = PTR_ERR(tmp);
@ -136,24 +137,21 @@ SYSCALL_DEFINE1(uselib, const char __user *, library)
fsnotify_open(file);
error = -ENOEXEC;
if(file->f_op) {
struct linux_binfmt * fmt;
read_lock(&binfmt_lock);
list_for_each_entry(fmt, &formats, lh) {
if (!fmt->load_shlib)
continue;
if (!try_module_get(fmt->module))
continue;
read_unlock(&binfmt_lock);
error = fmt->load_shlib(file);
read_lock(&binfmt_lock);
put_binfmt(fmt);
if (error != -ENOEXEC)
break;
}
read_lock(&binfmt_lock);
list_for_each_entry(fmt, &formats, lh) {
if (!fmt->load_shlib)
continue;
if (!try_module_get(fmt->module))
continue;
read_unlock(&binfmt_lock);
error = fmt->load_shlib(file);
read_lock(&binfmt_lock);
put_binfmt(fmt);
if (error != -ENOEXEC)
break;
}
read_unlock(&binfmt_lock);
exit:
fput(file);
out:
@ -1277,13 +1275,10 @@ static int check_unsafe_exec(struct linux_binprm *bprm)
*/
int prepare_binprm(struct linux_binprm *bprm)
{
umode_t mode;
struct inode * inode = file_inode(bprm->file);
struct inode *inode = file_inode(bprm->file);
umode_t mode = inode->i_mode;
int retval;
mode = inode->i_mode;
if (bprm->file->f_op == NULL)
return -EACCES;
/* clear any previous set[ug]id data from a previous binary */
bprm->cred->euid = current_euid();