From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
[ Upstream commit f15133df088ecadd141ea1907f2c96df67c729f0 ]
path_openat() jumps to the wrong place after do_tmpfile() - it has
already done path_cleanup() (as part of path_lookupat() called by
do_tmpfile()), so doing that again can lead to double fput().
Cc: stable@xxxxxxxxxxxxxxx # v3.11+
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
fs/namei.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/namei.c b/fs/namei.c
index 890d358..d20f061 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3197,7 +3197,7 @@ static struct file *path_openat(int dfd, struct filename *pathname,
if (unlikely(file->f_flags & __O_TMPFILE)) {
error = do_tmpfile(dfd, pathname, nd, flags, op, file, &opened);
- goto out;
+ goto out2;
}
error = path_init(dfd, pathname->name, flags | LOOKUP_PARENT, nd, &base);
@@ -3235,6 +3235,7 @@ out:
path_put(&nd->root);
if (base)
fput(base);
+out2:
if (!(opened & FILE_OPENED)) {
BUG_ON(!error);
put_filp(file);
--
2.1.0
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