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authorAl Viro <viro@zeniv.linux.org.uk>2013-09-23 00:27:52 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2013-10-25 07:34:54 +0400
commit72c2d53192004845cbc19cd8a30b3212a9288140 (patch)
tree31fcd924438f03d5aa09d13ffd813fb153da37c3 /fs/exec.c
parent22bd002ee76aa7d7a3393f39d977f6c106153c60 (diff)
downloadlinux-72c2d53192004845cbc19cd8a30b3212a9288140.tar.xz
file->f_op is never NULL...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c35
1 files changed, 15 insertions, 20 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 8875dd10ae7a..351440fbf1ee 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -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();