1This patch makes /proc/self/exe executable even if proc 2is not mounted. It is especially useful on NOMMU arches. 3 4diff -urp ../linux-2.6.30.org/fs/exec.c linux-2.6.30/fs/exec.c 5--- ../linux-2.6.30.org/fs/exec.c 2009-06-10 05:05:27.000000000 +0200 6+++ linux-2.6.30/fs/exec.c 2009-06-25 00:20:13.000000000 +0200 7@@ -652,9 +652,25 @@ struct file *open_exec(const char *name) 8 file = do_filp_open(AT_FDCWD, name, 9 O_LARGEFILE | O_RDONLY | FMODE_EXEC, 0, 10 MAY_EXEC | MAY_OPEN); 11- if (IS_ERR(file)) 12- goto out; 13+ if (IS_ERR(file)) { 14+ if ((PTR_ERR(file) == -ENOENT || PTR_ERR(file) == -EACCES) 15+ && strcmp(name, "/proc/self/exe") == 0 16+ ) { 17+ struct file *sv = file; 18+ struct mm_struct *mm; 19 20+ mm = get_task_mm(current); 21+ if (!mm) 22+ goto out; 23+ file = get_mm_exe_file(mm); 24+ mmput(mm); 25+ if (file) 26+ goto ok; 27+ file = sv; 28+ } 29+ goto out; 30+ } 31+ok: 32 err = -EACCES; 33 if (!S_ISREG(file->f_path.dentry->d_inode->i_mode)) 34 goto exit; 35