Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jmorris/selin...

[linux-2.6] / fs / binfmt_elf.c

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 90461f49e9026e55c5c725131a446f8646ad9402..51db1182b27e4470edbc6945574aa1158a110bea 100644 (file)
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -76,7 +76,8 @@ static struct linux_binfmt elf_format = {
                .load_binary    = load_elf_binary,
                .load_shlib     = load_elf_library,
                .core_dump      = elf_core_dump,
-               .min_coredump   = ELF_EXEC_PAGESIZE
+               .min_coredump   = ELF_EXEC_PAGESIZE,
+               .hasvdso        = 1
 };
 
 #define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
@@ -682,6 +683,15 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
                        retval = PTR_ERR(interpreter);
                        if (IS_ERR(interpreter))
                                goto out_free_interp;
+
+                       /*
+                        * If the binary is not readable then enforce
+                        * mm->dumpable = 0 regardless of the interpreter's
+                        * permissions.
+                        */
+                       if (file_permission(interpreter, MAY_READ) < 0)
+                               bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
+
                        retval = kernel_read(interpreter, 0, bprm->buf,
                                             BINPRM_BUF_SIZE);
                        if (retval != BINPRM_BUF_SIZE) {