[PATCH 1/6] uprobes/tracing: Fix dentry/mount leak in create_trace_uprobe()

[Oleg Nesterov <oleg@redhat.com>]

create_trace_uprobe() does kern_path() to find ->d_inode, but forgets
to do path_put(). We can do this right after igrab().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
 kernel/trace/trace_uprobe.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 7d5b407..6563f00 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -253,12 +253,13 @@ static int create_trace_uprobe(int argc, char **argv)
 	if (ret)
 		goto fail_address_parse;
 
+	inode = igrab(path.dentry->d_inode);
+	path_put(&path);
+
 	ret = kstrtoul(arg, 0, &offset);
 	if (ret)
 		goto fail_address_parse;
 
-	inode = igrab(path.dentry->d_inode);
-
 	argc -= 2;
 	argv += 2;
 
-- 
1.5.5.1