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- This patch makes /proc/self/exe executable even if proc
- is not mounted. It is especially useful on NOMMU arches.
- diff -urp ../linux-2.6.30.org/fs/exec.c linux-2.6.30/fs/exec.c
- --- ../linux-2.6.30.org/fs/exec.c 2009-06-10 05:05:27.000000000 +0200
- +++ linux-2.6.30/fs/exec.c 2009-06-25 00:20:13.000000000 +0200
- @@ -652,9 +652,25 @@ struct file *open_exec(const char *name)
- file = do_filp_open(AT_FDCWD, name,
- O_LARGEFILE | O_RDONLY | FMODE_EXEC, 0,
- MAY_EXEC | MAY_OPEN);
- - if (IS_ERR(file))
- - goto out;
- + if (IS_ERR(file)) {
- + if ((PTR_ERR(file) == -ENOENT || PTR_ERR(file) == -EACCES)
- + && strcmp(name, "/proc/self/exe") == 0
- + ) {
- + struct file *sv = file;
- + struct mm_struct *mm;
-
- + mm = get_task_mm(current);
- + if (!mm)
- + goto out;
- + file = get_mm_exe_file(mm);
- + mmput(mm);
- + if (file)
- + goto ok;
- + file = sv;
- + }
- + goto out;
- + }
- +ok:
- err = -EACCES;
- if (!S_ISREG(file->f_path.dentry->d_inode->i_mode))
- goto exit;
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