New locking/refcounting for fs_struct

[linux-2.6-omap-h63xx.git] / fs / compat.c

diff --git a/fs/compat.c b/fs/compat.c
index 55efdfebdf5ae14f5937add03075fdc8e716819d..baabf203b8479a771f7e702bc6f60cc934d7e7e3 100644 (file)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -51,6 +51,7 @@
 #include <linux/poll.h>
 #include <linux/mm.h>
 #include <linux/eventpoll.h>
+#include <linux/fs_struct.h>
 
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
@@ -1441,12 +1442,15 @@ int compat_do_execve(char * filename,
        bprm->cred = prepare_exec_creds();
        if (!bprm->cred)
                goto out_unlock;
-       check_unsafe_exec(bprm);
+
+       retval = check_unsafe_exec(bprm);
+       if (retval)
+               goto out_unlock;
 
        file = open_exec(filename);
        retval = PTR_ERR(file);
        if (IS_ERR(file))
-               goto out_unlock;
+               goto out_unmark;
 
        sched_exec();
 
@@ -1488,6 +1492,9 @@ int compat_do_execve(char * filename,
                goto out;
 
        /* execve succeeded */
+       write_lock(&current->fs->lock);
+       current->fs->in_exec = 0;
+       write_unlock(&current->fs->lock);
        current->in_execve = 0;
        mutex_unlock(&current->cred_exec_mutex);
        acct_update_integrals(current);
@@ -1506,6 +1513,11 @@ out_file:
                fput(bprm->file);
        }
 
+out_unmark:
+       write_lock(&current->fs->lock);
+       current->fs->in_exec = 0;
+       write_unlock(&current->fs->lock);
+
 out_unlock:
        current->in_execve = 0;
        mutex_unlock(&current->cred_exec_mutex);