diff options
| author | Denys Vlasenko | 2009-07-02 12:04:50 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2009-07-02 12:04:50 +0200 |
| commit | cf4e503875814ce6e4ff8666fb4a0350ca72c6e4 (patch) | |
| tree | 0ceea8f27a73df6ea0b137c92ba467c21ddbae06 /examples/linux-2.6.30_proc_self_exe.patch | |
| parent | 7d5ddf14a3ce2b9c3e8251e40d67333b13287a15 (diff) | |
| download | busybox-cf4e503875814ce6e4ff8666fb4a0350ca72c6e4.zip busybox-cf4e503875814ce6e4ff8666fb4a0350ca72c6e4.tar.gz | |
Added kernel patch for /proc/self/exe to examples
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'examples/linux-2.6.30_proc_self_exe.patch')
| -rw-r--r-- | examples/linux-2.6.30_proc_self_exe.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/examples/linux-2.6.30_proc_self_exe.patch b/examples/linux-2.6.30_proc_self_exe.patch new file mode 100644 index 0000000..a36581b --- /dev/null +++ b/examples/linux-2.6.30_proc_self_exe.patch @@ -0,0 +1,34 @@ +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; |