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prctl: avoid using mmap_sem for exe_file serialization
[linux-2.6-block.git]
/
fs
/
exec.c
diff --git
a/fs/exec.c
b/fs/exec.c
index c7f9b733406dc22165647a8f415ce00324ae7daf..a5fef835ebc59fe1dab0311dab0f4fe427894b50 100644
(file)
--- a/
fs/exec.c
+++ b/
fs/exec.c
@@
-1078,7
+1078,13
@@
int flush_old_exec(struct linux_binprm * bprm)
if (retval)
goto out;
+ /*
+ * Must be called _before_ exec_mmap() as bprm->mm is
+ * not visibile until then. This also enables the update
+ * to be lockless.
+ */
set_mm_exe_file(bprm->mm, bprm->file);
+
/*
* Release all of the old mmap stuff
*/