4.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
commit f15133df088ecadd141ea1907f2c96df67c729f0 upstream.
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().
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/namei.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3228,7 +3228,7 @@ static struct file *path_openat(int dfd,
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, nd);
@@ -3258,6 +3258,7 @@ static struct file *path_openat(int dfd,
}
out:
path_cleanup(nd);
+out2:
if (!(opened & FILE_OPENED)) {
BUG_ON(!error);
put_filp(file);
--
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