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vfs: show_vfsstat: do not ignore errors from show_devname method

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Explicitly check show_devname method return code and bail out in case
of an error.  This fixes regression introduced by commit 9d4d65748a.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Dmitry V. Levin 2015-03-19 11:10:54 +00:00 committed by Al Viro
parent a5b3a80b89
commit 5f8d498d43
1 changed files with 2 additions and 0 deletions
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2
fs/proc_namespace.c
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@ -199,6 +199,8 @@ static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt)
if (sb->s_op->show_devname) {
seq_puts(m, "device ");
err = sb->s_op->show_devname(m, mnt_path.dentry);
if (err)
goto out;
} else {
if (r->mnt_devname) {
seq_puts(m, "device ");